From 6fac4829ce0ef9b7f24369086ce5f0e9f38d37bc Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Tue, 13 Nov 2012 14:20:55 +0100 Subject: cputime: Use accessors to read task cputime stats This is in preparation for the full dynticks feature. While remotely reading the cputime of a task running in a full dynticks CPU, we'll need to do some extra-computation. This way we can account the time it spent tickless in userspace since its last cputime snapshot. Signed-off-by: Frederic Weisbecker Cc: Andrew Morton Cc: Ingo Molnar Cc: Li Zhong Cc: Namhyung Kim Cc: Paul E. McKenney Cc: Paul Gortmaker Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner --- kernel/signal.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 372771e948c2..776a45a3661b 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1638,6 +1638,7 @@ bool do_notify_parent(struct task_struct *tsk, int sig) unsigned long flags; struct sighand_struct *psig; bool autoreap = false; + cputime_t utime, stime; BUG_ON(sig == -1); @@ -1675,8 +1676,9 @@ bool do_notify_parent(struct task_struct *tsk, int sig) task_uid(tsk)); rcu_read_unlock(); - info.si_utime = cputime_to_clock_t(tsk->utime + tsk->signal->utime); - info.si_stime = cputime_to_clock_t(tsk->stime + tsk->signal->stime); + task_cputime(tsk, &utime, &stime); + info.si_utime = cputime_to_clock_t(utime + tsk->signal->utime); + info.si_stime = cputime_to_clock_t(stime + tsk->signal->stime); info.si_status = tsk->exit_code & 0x7f; if (tsk->exit_code & 0x80) @@ -1740,6 +1742,7 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, unsigned long flags; struct task_struct *parent; struct sighand_struct *sighand; + cputime_t utime, stime; if (for_ptracer) { parent = tsk->parent; @@ -1758,8 +1761,9 @@ static void do_notify_parent_cldstop(struct task_struct *tsk, info.si_uid = from_kuid_munged(task_cred_xxx(parent, user_ns), task_uid(tsk)); rcu_read_unlock(); - info.si_utime = cputime_to_clock_t(tsk->utime); - info.si_stime = cputime_to_clock_t(tsk->stime); + task_cputime(tsk, &utime, &stime); + info.si_utime = cputime_to_clock_t(utime); + info.si_stime = cputime_to_clock_t(stime); info.si_code = why; switch (why) { -- cgit v1.2.3 From eaca6eae3e0c41d41fcb9d1d70e00934988dff2e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 25 Nov 2012 23:12:10 -0500 Subject: sanitize rt_sigaction() situation a bit Switch from __ARCH_WANT_SYS_RT_SIGACTION to opposite (!CONFIG_ODD_RT_SIGACTION); the only two architectures that need it are alpha and sparc. The reason for use of CONFIG_... instead of __ARCH_... is that it's needed only kernel-side and doing it that way avoids a mess with include order on many architectures. Signed-off-by: Al Viro --- arch/Kconfig | 5 +++++ arch/alpha/Kconfig | 1 + arch/ia64/include/asm/unistd.h | 4 ---- arch/powerpc/include/asm/syscalls.h | 3 --- arch/sparc/Kconfig | 1 + arch/sparc/kernel/sys_sparc_32.c | 11 +++++------ arch/x86/um/shared/sysdep/syscalls_32.h | 5 ----- arch/xtensa/include/asm/syscall.h | 5 ----- include/asm-generic/syscalls.h | 5 ----- include/linux/syscalls.h | 6 ++++++ kernel/signal.c | 4 ++-- 11 files changed, 20 insertions(+), 30 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 7f8f281f2585..6e4c32a5a358 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -373,4 +373,9 @@ config CLONE_BACKWARDS2 help Architecture has the first two arguments of clone(2) swapped. +config ODD_RT_SIGACTION + bool + help + Architecture has unusual rt_sigaction(2) arguments + source "kernel/gcov/Kconfig" diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 9d5904cc7712..8696c03a9d73 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -23,6 +23,7 @@ config ALPHA select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select GENERIC_SIGALTSTACK + select ODD_RT_SIGACTION help The Alpha is a 64-bit general-purpose processor designed and marketed by the Digital Equipment Corporation of blessed memory, diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h index c3cc42a15af1..bfbb109458be 100644 --- a/arch/ia64/include/asm/unistd.h +++ b/arch/ia64/include/asm/unistd.h @@ -49,10 +49,6 @@ asmlinkage unsigned long sys_mmap2( struct pt_regs; struct sigaction; asmlinkage long sys_ia64_pipe(void); -asmlinkage long sys_rt_sigaction(int sig, - const struct sigaction __user *act, - struct sigaction __user *oact, - size_t sigsetsize); /* * "Conditional" syscalls diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h index b5308d3e6d39..5c51659e61d5 100644 --- a/arch/powerpc/include/asm/syscalls.h +++ b/arch/powerpc/include/asm/syscalls.h @@ -19,9 +19,6 @@ asmlinkage unsigned long sys_mmap2(unsigned long addr, size_t len, unsigned long fd, unsigned long pgoff); asmlinkage long sys_pipe(int __user *fildes); asmlinkage long sys_pipe2(int __user *fildes, int flags); -asmlinkage long sys_rt_sigaction(int sig, - const struct sigaction __user *act, - struct sigaction __user *oact, size_t sigsetsize); asmlinkage long ppc64_personality(unsigned long personality); asmlinkage int ppc_rtas(struct rtas_args __user *uargs); asmlinkage time_t sys64_time(time_t __user * tloc); diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 9f2edb5c5551..89dde2f0653a 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -41,6 +41,7 @@ config SPARC select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select MODULES_USE_ELF_RELA + select ODD_RT_SIGACTION config SPARC32 def_bool !64BIT diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index 2da0bdcae52f..cdd2d7035930 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -197,12 +197,11 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act, return ret; } -asmlinkage long -sys_rt_sigaction(int sig, - const struct sigaction __user *act, - struct sigaction __user *oact, - void __user *restorer, - size_t sigsetsize) +SYSCALL_DEFINE5(rt_sigaction, int, sig, + const struct sigaction __user *, act, + struct sigaction __user *, oact, + void __user *, restorer, + size_t, sigsetsize) { struct k_sigaction new_ka, old_ka; int ret; diff --git a/arch/x86/um/shared/sysdep/syscalls_32.h b/arch/x86/um/shared/sysdep/syscalls_32.h index 8436079be914..68fd2cf526fd 100644 --- a/arch/x86/um/shared/sysdep/syscalls_32.h +++ b/arch/x86/um/shared/sysdep/syscalls_32.h @@ -8,11 +8,6 @@ typedef long syscall_handler_t(struct pt_regs); -/* Not declared on x86, incompatible declarations on x86_64, so these have - * to go here rather than in sys_call_table.c - */ -extern syscall_handler_t sys_rt_sigaction; - extern syscall_handler_t *sys_call_table[]; #define EXECUTE_SYSCALL(syscall, regs) \ diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h index 8d5e47fad095..6cf7c6c07a84 100644 --- a/arch/xtensa/include/asm/syscall.h +++ b/arch/xtensa/include/asm/syscall.h @@ -9,15 +9,10 @@ */ struct pt_regs; -struct sigaction; asmlinkage long xtensa_ptrace(long, long, long, long); asmlinkage long xtensa_sigreturn(struct pt_regs*); asmlinkage long xtensa_rt_sigreturn(struct pt_regs*); asmlinkage long xtensa_sigaltstack(struct pt_regs *regs); -asmlinkage long sys_rt_sigaction(int, - const struct sigaction __user *, - struct sigaction __user *, - size_t); asmlinkage long xtensa_shmat(int, char __user *, int); asmlinkage long xtensa_fadvise64_64(int, int, unsigned long long, unsigned long long); diff --git a/include/asm-generic/syscalls.h b/include/asm-generic/syscalls.h index 1db51b8524e9..6a8d620a84d4 100644 --- a/include/asm-generic/syscalls.h +++ b/include/asm-generic/syscalls.h @@ -36,9 +36,4 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs); asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize); #endif -#ifndef sys_rt_sigaction -asmlinkage long sys_rt_sigaction(int sig, const struct sigaction __user *act, - struct sigaction __user *oact, size_t sigsetsize); -#endif - #endif /* __ASM_GENERIC_SYSCALLS_H */ diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 45e2db270255..75defcd1c276 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -377,6 +377,12 @@ asmlinkage long sys_init_module(void __user *umod, unsigned long len, asmlinkage long sys_delete_module(const char __user *name_user, unsigned int flags); +#ifndef CONFIG_ODD_RT_SIGACTION +asmlinkage long sys_rt_sigaction(int, + const struct sigaction __user *, + struct sigaction __user *, + size_t); +#endif asmlinkage long sys_rt_sigprocmask(int how, sigset_t __user *set, sigset_t __user *oset, size_t sigsetsize); asmlinkage long sys_rt_sigpending(sigset_t __user *set, size_t sigsetsize); diff --git a/kernel/signal.c b/kernel/signal.c index 53cd5c4d1172..00cd1ce998be 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3231,7 +3231,7 @@ SYSCALL_DEFINE3(sigprocmask, int, how, old_sigset_t __user *, nset, } #endif /* __ARCH_WANT_SYS_SIGPROCMASK */ -#ifdef __ARCH_WANT_SYS_RT_SIGACTION +#ifndef CONFIG_ODD_RT_SIGACTION /** * sys_rt_sigaction - alter an action taken by a process * @sig: signal to be sent @@ -3265,7 +3265,7 @@ SYSCALL_DEFINE4(rt_sigaction, int, sig, out: return ret; } -#endif /* __ARCH_WANT_SYS_RT_SIGACTION */ +#endif /* !CONFIG_ODD_RT_SIGACTION */ #ifdef __ARCH_WANT_SYS_SGETMASK -- cgit v1.2.3 From ad4b65a434bdd2ff37d095ab1ccd836203e985ba Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 24 Dec 2012 21:43:56 -0500 Subject: consolidate rt_sigsuspend() * pull compat version alongside with the native one * make little-endian compat variant just call the native * don't bother with separate conditional for compat (both native and compat are going to become unconditional very soon). Signed-off-by: Al Viro --- kernel/compat.c | 17 ----------------- kernel/signal.c | 24 +++++++++++++++++++++++- 2 files changed, 23 insertions(+), 18 deletions(-) (limited to 'kernel/signal.c') diff --git a/kernel/compat.c b/kernel/compat.c index adf7646343da..0c07d435254f 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -1067,23 +1067,6 @@ asmlinkage long compat_sys_stime(compat_time_t __user *tptr) #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ -#ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND -asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) -{ - sigset_t newset; - compat_sigset_t newset32; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - - if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) - return -EFAULT; - sigset_from_compat(&newset, &newset32); - return sigsuspend(&newset); -} -#endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ - asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) { struct timex txc; diff --git a/kernel/signal.c b/kernel/signal.c index 00cd1ce998be..4a0934e03d5c 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3352,7 +3352,29 @@ SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *, unewset, size_t, sigsetsize) return -EFAULT; return sigsuspend(&newset); } -#endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */ + +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_size_t, sigsetsize) +{ +#ifdef __BIG_ENDIAN + sigset_t newset; + compat_sigset_t newset32; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) + return -EFAULT; + sigset_from_compat(&newset, &newset32); + return sigsuspend(&newset); +#else + /* on little-endian bitmaps don't care about granularity */ + return sys_rt_sigsuspend((sigset_t __user *)unewset, sigsetsize); +#endif +} +#endif +#endif __attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma) { -- cgit v1.2.3 From 322a56cb1fcbe228eee5cdb8a9c6df9f797d998c Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 13:32:58 -0500 Subject: generic compat_sys_rt_sigprocmask() conditional on GENERIC_COMPAT_RT_SIGPROCMASK; by the end of that series it will become the same thing as COMPAT and conditional will die out. Signed-off-by: Al Viro --- arch/Kconfig | 3 +++ include/linux/compat.h | 8 +++++++- kernel/compat.c | 13 ++++++++++++- kernel/signal.c | 41 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 63 insertions(+), 2 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 6e4c32a5a358..374a68adbf1f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -359,6 +359,9 @@ config MODULES_USE_ELF_REL config GENERIC_SIGALTSTACK bool +config GENERIC_COMPAT_RT_SIGPROCMASK + bool + # # ABI hall of shame # diff --git a/include/linux/compat.h b/include/linux/compat.h index dec7e2d18875..9d3c2a98d537 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -401,7 +401,8 @@ asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); extern int compat_printk(const char *fmt, ...); -extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); +extern void sigset_from_compat(sigset_t *set, const compat_sigset_t *compat); +extern void sigset_to_compat(compat_sigset_t *compat, const sigset_t *set); asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes, @@ -592,6 +593,11 @@ asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, struct compat_timespec __user *uts, compat_size_t sigsetsize); asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize); +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK +asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, + compat_sigset_t __user *oset, + compat_size_t sigsetsize); +#endif asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg); diff --git a/kernel/compat.c b/kernel/compat.c index 0c07d435254f..e2a9c4785988 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -971,7 +971,7 @@ long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, } void -sigset_from_compat (sigset_t *set, compat_sigset_t *compat) +sigset_from_compat(sigset_t *set, const compat_sigset_t *compat) { switch (_NSIG_WORDS) { case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); @@ -982,6 +982,17 @@ sigset_from_compat (sigset_t *set, compat_sigset_t *compat) } EXPORT_SYMBOL_GPL(sigset_from_compat); +void +sigset_to_compat(compat_sigset_t *compat, const sigset_t *set) +{ + switch (_NSIG_WORDS) { + case 4: compat->sig[7] = (set->sig[3] >> 32); compat->sig[6] = set->sig[3]; + case 3: compat->sig[5] = (set->sig[2] >> 32); compat->sig[4] = set->sig[2]; + case 2: compat->sig[3] = (set->sig[1] >> 32); compat->sig[2] = set->sig[1]; + case 1: compat->sig[1] = (set->sig[0] >> 32); compat->sig[0] = set->sig[0]; + } +} + asmlinkage long compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, struct compat_siginfo __user *uinfo, diff --git a/kernel/signal.c b/kernel/signal.c index 4a0934e03d5c..bce1222b7315 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2613,6 +2613,47 @@ SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset, return 0; } +#ifdef CONFIG_COMPAT +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK +COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, + compat_sigset_t __user *, oset, compat_size_t, sigsetsize) +{ +#ifdef __BIG_ENDIAN + sigset_t old_set = current->blocked; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (nset) { + compat_sigset_t new32; + sigset_t new_set; + int error; + if (copy_from_user(&new32, nset, sizeof(compat_sigset_t))) + return -EFAULT; + + sigset_from_compat(&new_set, &new32); + sigdelsetmask(&new_set, sigmask(SIGKILL)|sigmask(SIGSTOP)); + + error = sigprocmask(how, &new_set, NULL); + if (error) + return error; + } + if (oset) { + compat_sigset_t old32; + sigset_to_compat(&old32, &old_set); + if (copy_to_user(oset, &old_set, sizeof(sigset_t))) + return -EFAULT; + } + return 0; +#else + return sys_rt_sigprocmask(how, (sigset_t __user *)nset, + (sigset_t __user *)oset, sigsetsize); +#endif +} +#endif +#endif + long do_sigpending(void __user *set, unsigned long sigsetsize) { long error = -EINVAL; -- cgit v1.2.3 From fe9c1db2cfc363cd30ecfe6480481b280abf8c0a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 14:31:38 -0500 Subject: generic compat_sys_rt_sigpending() conditional on GENERIC_COMPAT_RT_SIGPENDING; by the end of that series it will become the same thing as COMPAT and conditional will die out. Signed-off-by: Al Viro --- arch/Kconfig | 3 +++ include/linux/compat.h | 4 ++++ include/linux/signal.h | 1 - kernel/signal.c | 52 +++++++++++++++++++++++++++++++++----------------- 4 files changed, 42 insertions(+), 18 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 374a68adbf1f..18c0383dcc42 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -362,6 +362,9 @@ config GENERIC_SIGALTSTACK config GENERIC_COMPAT_RT_SIGPROCMASK bool +config GENERIC_COMPAT_RT_SIGPENDING + bool + # # ABI hall of shame # diff --git a/include/linux/compat.h b/include/linux/compat.h index 9d3c2a98d537..75548a43a1c5 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -598,6 +598,10 @@ asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, compat_size_t sigsetsize); #endif +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPENDING +asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, + compat_size_t sigsetsize); +#endif asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg); diff --git a/include/linux/signal.h b/include/linux/signal.h index 0a89ffc48466..786bd99fde65 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -243,7 +243,6 @@ extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); extern long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info); -extern long do_sigpending(void __user *, unsigned long); extern int do_sigtimedwait(const sigset_t *, siginfo_t *, const struct timespec *); extern int sigprocmask(int, sigset_t *, sigset_t *); diff --git a/kernel/signal.c b/kernel/signal.c index bce1222b7315..3040c349b0e1 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2654,28 +2654,19 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, #endif #endif -long do_sigpending(void __user *set, unsigned long sigsetsize) +static int do_sigpending(void *set, unsigned long sigsetsize) { - long error = -EINVAL; - sigset_t pending; - if (sigsetsize > sizeof(sigset_t)) - goto out; + return -EINVAL; spin_lock_irq(¤t->sighand->siglock); - sigorsets(&pending, ¤t->pending.signal, + sigorsets(set, ¤t->pending.signal, ¤t->signal->shared_pending.signal); spin_unlock_irq(¤t->sighand->siglock); /* Outside the lock because only this thread touches it. */ - sigandsets(&pending, ¤t->blocked, &pending); - - error = -EFAULT; - if (!copy_to_user(set, &pending, sigsetsize)) - error = 0; - -out: - return error; + sigandsets(set, ¤t->blocked, set); + return 0; } /** @@ -2684,10 +2675,37 @@ out: * @set: stores pending signals * @sigsetsize: size of sigset_t type or larger */ -SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, set, size_t, sigsetsize) +SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize) +{ + sigset_t set; + int err = do_sigpending(&set, sigsetsize); + if (!err && copy_to_user(uset, &set, sigsetsize)) + err = -EFAULT; + return err; +} + +#ifdef CONFIG_COMPAT +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPENDING +COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset, + compat_size_t, sigsetsize) { - return do_sigpending(set, sigsetsize); +#ifdef __BIG_ENDIAN + sigset_t set; + int err = do_sigpending(&set, sigsetsize); + if (!err) { + compat_sigset_t set32; + sigset_to_compat(&set32, &set); + /* we can get here only if sigsetsize <= sizeof(set) */ + if (copy_to_user(uset, &set32, sigsetsize)) + err = -EFAULT; + } + return err; +#else + return sys_rt_sigpending((sigset_t __user *)uset, sigsetsize); +#endif } +#endif +#endif #ifndef HAVE_ARCH_COPY_SIGINFO_TO_USER @@ -3216,7 +3234,7 @@ int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp) */ SYSCALL_DEFINE1(sigpending, old_sigset_t __user *, set) { - return do_sigpending(set, sizeof(*set)); + return sys_rt_sigpending((sigset_t __user *)set, sizeof(old_sigset_t)); } #endif -- cgit v1.2.3 From 75907d4d7bc5d79b82d1453d9689efc588de1b43 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 15:19:12 -0500 Subject: generic compat_sys_rt_sigqueueinfo() conditional on GENERIC_COMPAT_RT_SIGQUEUEINFO; by the end of that series it will become the same thing as COMPAT and conditional will die out. Signed-off-by: Al Viro --- arch/Kconfig | 3 +++ include/linux/compat.h | 4 ++++ kernel/signal.c | 45 ++++++++++++++++++++++++++++++++------------- 3 files changed, 39 insertions(+), 13 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 18c0383dcc42..c612b5ccfd84 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -365,6 +365,9 @@ config GENERIC_COMPAT_RT_SIGPROCMASK config GENERIC_COMPAT_RT_SIGPENDING bool +config GENERIC_COMPAT_RT_SIGQUEUEINFO + bool + # # ABI hall of shame # diff --git a/include/linux/compat.h b/include/linux/compat.h index 75548a43a1c5..bbee15ef3ae9 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -602,6 +602,10 @@ asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, compat_size_t sigsetsize); #endif +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO +asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, + struct compat_siginfo __user *uinfo); +#endif asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg); diff --git a/kernel/signal.c b/kernel/signal.c index 3040c349b0e1..6cd3023cc66b 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2983,6 +2983,22 @@ SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig) return do_tkill(0, pid, sig); } +static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info) +{ + /* Not even root can pretend to send signals from the kernel. + * Nor can they impersonate a kill()/tgkill(), which adds source info. + */ + if (info->si_code >= 0 || info->si_code == SI_TKILL) { + /* We used to allow any < 0 si_code */ + WARN_ON_ONCE(info->si_code < 0); + return -EPERM; + } + info->si_signo = sig; + + /* POSIX.1b doesn't mention process groups. */ + return kill_proc_info(sig, info, pid); +} + /** * sys_rt_sigqueueinfo - send signal information to a signal * @pid: the PID of the thread @@ -2993,23 +3009,26 @@ SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, siginfo_t __user *, uinfo) { siginfo_t info; - if (copy_from_user(&info, uinfo, sizeof(siginfo_t))) return -EFAULT; + return do_rt_sigqueueinfo(pid, sig, &info); +} - /* Not even root can pretend to send signals from the kernel. - * Nor can they impersonate a kill()/tgkill(), which adds source info. - */ - if (info.si_code >= 0 || info.si_code == SI_TKILL) { - /* We used to allow any < 0 si_code */ - WARN_ON_ONCE(info.si_code < 0); - return -EPERM; - } - info.si_signo = sig; - - /* POSIX.1b doesn't mention process groups. */ - return kill_proc_info(sig, &info, pid); +#ifdef CONFIG_COMPAT +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO +COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo, + compat_pid_t, pid, + int, sig, + struct compat_siginfo __user *, uinfo) +{ + siginfo_t info; + int ret = copy_siginfo_from_user32(&info, uinfo); + if (unlikely(ret)) + return ret; + return do_rt_sigqueueinfo(pid, sig, &info); } +#endif +#endif long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) { -- cgit v1.2.3 From 0a0e8cdf734ce723bfc4ca6032ffbc03ce17c642 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 16:04:12 -0500 Subject: old sigsuspend variants in kernel/signal.c conditional on OLD_SIGSUSPEND/OLD_SIGSUSPEND3, depending on which variety of that fossil is needed. Signed-off-by: Al Viro --- arch/Kconfig | 10 ++++++++++ include/linux/syscalls.h | 8 ++++++++ kernel/signal.c | 17 +++++++++++++++++ 3 files changed, 35 insertions(+) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index c612b5ccfd84..6b1df95ffefc 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -387,4 +387,14 @@ config ODD_RT_SIGACTION help Architecture has unusual rt_sigaction(2) arguments +config OLD_SIGSUSPEND + bool + help + Architecture has old sigsuspend(2) syscall, of one-argument variety + +config OLD_SIGSUSPEND3 + bool + help + Even weirder antique ABI - three-argument sigsuspend(2) + source "kernel/gcov/Kconfig" diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 75defcd1c276..d2dd2f63d220 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -377,6 +377,14 @@ asmlinkage long sys_init_module(void __user *umod, unsigned long len, asmlinkage long sys_delete_module(const char __user *name_user, unsigned int flags); +#ifdef CONFIG_OLD_SIGSUSPEND +asmlinkage long sys_sigsuspend(old_sigset_t mask); +#endif + +#ifdef CONFIG_OLD_SIGSUSPEND3 +asmlinkage long sys_sigsuspend(int unused1, int unused2, old_sigset_t mask); +#endif + #ifndef CONFIG_ODD_RT_SIGACTION asmlinkage long sys_rt_sigaction(int, const struct sigaction __user *, diff --git a/kernel/signal.c b/kernel/signal.c index 6cd3023cc66b..93fd4b83d866 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3454,6 +3454,23 @@ COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_ #endif #endif +#ifdef CONFIG_OLD_SIGSUSPEND +SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask) +{ + sigset_t blocked; + siginitset(&blocked, mask); + return sigsuspend(&blocked); +} +#endif +#ifdef CONFIG_OLD_SIGSUSPEND3 +SYSCALL_DEFINE3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask) +{ + sigset_t blocked; + siginitset(&blocked, mask); + return sigsuspend(&blocked); +} +#endif + __attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma) { return NULL; -- cgit v1.2.3 From 9aae8fc05d2d130797be436eb7cae29c32710193 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 24 Dec 2012 23:12:04 -0500 Subject: switch rt_tgsigqueueinfo to COMPAT_SYSCALL_DEFINE C ABI violations on sparc, ppc and mips Signed-off-by: Al Viro --- include/linux/signal.h | 2 -- kernel/compat.c | 11 ----------- kernel/signal.c | 17 ++++++++++++++++- 3 files changed, 16 insertions(+), 14 deletions(-) (limited to 'kernel/signal.c') diff --git a/include/linux/signal.h b/include/linux/signal.h index 786bd99fde65..ed1e71f1aac7 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -241,8 +241,6 @@ extern int do_send_sig_info(int sig, struct siginfo *info, struct task_struct *p, bool group); extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p); extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *); -extern long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, - siginfo_t *info); extern int do_sigtimedwait(const sigset_t *, siginfo_t *, const struct timespec *); extern int sigprocmask(int, sigset_t *, sigset_t *); diff --git a/kernel/compat.c b/kernel/compat.c index a53b04a2b5eb..cf75a288f0c0 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -1025,17 +1025,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese, return ret; } -asmlinkage long -compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, - struct compat_siginfo __user *uinfo) -{ - siginfo_t info; - - if (copy_siginfo_from_user32(&info, uinfo)) - return -EFAULT; - return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); -} - #ifdef __ARCH_WANT_COMPAT_SYS_TIME /* compat_time_t is a 32 bit "long" and needs to get converted. */ diff --git a/kernel/signal.c b/kernel/signal.c index 93fd4b83d866..5a4aed1244fb 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3030,7 +3030,7 @@ COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo, #endif #endif -long do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) +static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) { /* This is only valid for single tasks */ if (pid <= 0 || tgid <= 0) @@ -3060,6 +3060,21 @@ SYSCALL_DEFINE4(rt_tgsigqueueinfo, pid_t, tgid, pid_t, pid, int, sig, return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); } +#ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_tgsigqueueinfo, + compat_pid_t, tgid, + compat_pid_t, pid, + int, sig, + struct compat_siginfo __user *, uinfo) +{ + siginfo_t info; + + if (copy_siginfo_from_user32(&info, uinfo)) + return -EFAULT; + return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); +} +#endif + int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) { struct task_struct *t = current; -- cgit v1.2.3 From 08d32fe504a7670cab3190c624448695adcf70e4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 18:38:15 -0500 Subject: generic sys_compat_rt_sigaction() Again, protected by a temporary config symbol (GENERIC_COMPAT_RT_SIGACTION); will be gone by the end of series. Signed-off-by: Al Viro --- arch/Kconfig | 3 +++ include/linux/compat.h | 24 ++++++++++++++++++++++++ kernel/signal.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 6b1df95ffefc..3b4a416fc448 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -368,6 +368,9 @@ config GENERIC_COMPAT_RT_SIGPENDING config GENERIC_COMPAT_RT_SIGQUEUEINFO bool +config GENERIC_COMPAT_RT_SIGACTION + bool + # # ABI hall of shame # diff --git a/include/linux/compat.h b/include/linux/compat.h index bbee15ef3ae9..0d53ab4f79c5 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -142,6 +142,22 @@ typedef struct { compat_sigset_word sig[_COMPAT_NSIG_WORDS]; } compat_sigset_t; +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION +struct compat_sigaction { +#ifndef __ARCH_HAS_ODD_SIGACTION + compat_uptr_t sa_handler; + compat_ulong_t sa_flags; +#else + compat_ulong_t sa_flags; + compat_uptr_t sa_handler; +#endif +#ifdef __ARCH_HAS_SA_RESTORER + compat_uptr_t sa_restorer; +#endif + compat_sigset_t sa_mask __packed; +}; +#endif + /* * These functions operate strictly on struct compat_time* */ @@ -602,6 +618,14 @@ asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, compat_size_t sigsetsize); #endif +#ifndef CONFIG_ODD_RT_SIGACTION +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION +asmlinkage long compat_sys_rt_sigaction(int, + const struct compat_sigaction __user *, + struct compat_sigaction __user *, + compat_size_t); +#endif +#endif #ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo); diff --git a/kernel/signal.c b/kernel/signal.c index 5a4aed1244fb..f3665f3de660 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3358,6 +3358,55 @@ SYSCALL_DEFINE4(rt_sigaction, int, sig, out: return ret; } +#ifdef CONFIG_COMPAT +#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION +COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, + const struct compat_sigaction __user *, act, + struct compat_sigaction __user *, oact, + compat_size_t, sigsetsize) +{ + struct k_sigaction new_ka, old_ka; + compat_sigset_t mask; +#ifdef __ARCH_HAS_SA_RESTORER + compat_uptr_t restorer; +#endif + int ret; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + + if (act) { + compat_uptr_t handler; + ret = get_user(handler, &act->sa_handler); + new_ka.sa.sa_handler = compat_ptr(handler); +#ifdef __ARCH_HAS_SA_RESTORER + ret |= get_user(restorer, &act->sa_restorer); + new_ka.sa.sa_restorer = compat_ptr(restorer); +#endif + ret |= copy_from_user(&mask, &act->sa_mask, sizeof(mask)); + ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); + if (ret) + return -EFAULT; + sigset_from_compat(&new_ka.sa.sa_mask, &mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + if (!ret && oact) { + sigset_to_compat(&mask, &old_ka.sa.sa_mask); + ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), + &oact->sa_handler); + ret |= copy_to_user(&oact->sa_mask, &mask, sizeof(mask)); + ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); +#ifdef __ARCH_HAS_SA_RESTORER + ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), + &oact->sa_restorer); +#endif + } + return ret; +} +#endif +#endif #endif /* !CONFIG_ODD_RT_SIGACTION */ #ifdef __ARCH_WANT_SYS_SGETMASK -- cgit v1.2.3 From 495dfbf767553980dbd40a19a96a8ca5fa1be616 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 25 Dec 2012 19:09:45 -0500 Subject: generic sys_sigaction() and compat_sys_sigaction() conditional on OLD_SIGACTION/COMPAT_OLD_SIGACTION Signed-off-by: Al Viro --- arch/Kconfig | 11 +++++++ include/linux/compat.h | 14 +++++++++ include/linux/signal.h | 9 ++++++ include/linux/syscalls.h | 5 ++++ kernel/signal.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 117 insertions(+) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index 3b4a416fc448..e50d3af294d4 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -400,4 +400,15 @@ config OLD_SIGSUSPEND3 help Even weirder antique ABI - three-argument sigsuspend(2) +config OLD_SIGACTION + bool + help + Architecture has old sigaction(2) syscall. Nope, not the same + as OLD_SIGSUSPEND | OLD_SIGSUSPEND3 - alpha has sigsuspend(2), + but fairly different variant of sigaction(2), thanks to OSF/1 + compatibility... + +config COMPAT_OLD_SIGACTION + bool + source "kernel/gcov/Kconfig" diff --git a/include/linux/compat.h b/include/linux/compat.h index 0d53ab4f79c5..e20b8b404ae9 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -299,6 +299,15 @@ struct compat_robust_list_head { compat_uptr_t list_op_pending; }; +#ifdef CONFIG_COMPAT_OLD_SIGACTION +struct compat_old_sigaction { + compat_uptr_t sa_handler; + compat_old_sigset_t sa_mask; + compat_ulong_t sa_flags; + compat_uptr_t sa_restorer; +}; +#endif + struct compat_statfs; struct compat_statfs64; struct compat_old_linux_dirent; @@ -383,6 +392,11 @@ int get_compat_sigevent(struct sigevent *event, const struct compat_sigevent __user *u_event); long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo); +#ifdef CONFIG_COMPAT_OLD_SIGACTION +asmlinkage long compat_sys_sigaction(int sig, + const struct compat_old_sigaction __user *act, + struct compat_old_sigaction __user *oact); +#endif static inline int compat_timeval_compare(struct compat_timeval *lhs, struct compat_timeval *rhs) diff --git a/include/linux/signal.h b/include/linux/signal.h index 0b6878e882da..e28e8d455d6e 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -269,6 +269,15 @@ struct k_sigaction { __sigrestore_t ka_restorer; #endif }; + +#ifdef CONFIG_OLD_SIGACTION +struct old_sigaction { + __sighandler_t sa_handler; + old_sigset_t sa_mask; + unsigned long sa_flags; + __sigrestore_t sa_restorer; +}; +#endif extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); extern void signal_delivered(int sig, siginfo_t *info, struct k_sigaction *ka, struct pt_regs *regs, int stepping); diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 1c4938bf901e..02b045012785 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -385,6 +385,11 @@ asmlinkage long sys_sigsuspend(old_sigset_t mask); asmlinkage long sys_sigsuspend(int unused1, int unused2, old_sigset_t mask); #endif +#ifdef CONFIG_OLD_SIGACTION +asmlinkage long sys_sigaction(int, const struct old_sigaction __user *, + struct old_sigaction __user *); +#endif + #ifndef CONFIG_ODD_RT_SIGACTION asmlinkage long sys_rt_sigaction(int, const struct sigaction __user *, diff --git a/kernel/signal.c b/kernel/signal.c index f3665f3de660..79998f5b0f11 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3409,6 +3409,84 @@ COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, #endif #endif /* !CONFIG_ODD_RT_SIGACTION */ +#ifdef CONFIG_OLD_SIGACTION +SYSCALL_DEFINE3(sigaction, int, sig, + const struct old_sigaction __user *, act, + struct old_sigaction __user *, oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; +#ifdef __ARCH_HAS_KA_RESTORER + new_ka.ka_restorer = NULL; +#endif + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + + return ret; +} +#endif +#ifdef CONFIG_COMPAT_OLD_SIGACTION +COMPAT_SYSCALL_DEFINE3(sigaction, int, sig, + const struct compat_old_sigaction __user *, act, + struct compat_old_sigaction __user *, oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + compat_old_sigset_t mask; + compat_uptr_t handler, restorer; + + if (act) { + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(handler, &act->sa_handler) || + __get_user(restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) + return -EFAULT; + +#ifdef __ARCH_HAS_KA_RESTORER + new_ka.ka_restorer = NULL; +#endif + new_ka.sa.sa_handler = compat_ptr(handler); + new_ka.sa.sa_restorer = compat_ptr(restorer); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(ptr_to_compat(old_ka.sa.sa_handler), + &oact->sa_handler) || + __put_user(ptr_to_compat(old_ka.sa.sa_restorer), + &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) + return -EFAULT; + } + return ret; +} +#endif + #ifdef __ARCH_WANT_SYS_SGETMASK /* -- cgit v1.2.3 From 2ce5da17570771330f44ac993b77749debf7954b Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 7 Nov 2012 15:11:25 -0500 Subject: new helper: signal_setup_done() usual "call force_sigsegv or signal_delivered" logics. Takes ksignal instead of separate siginfo/k_sigaction. Signed-off-by: Al Viro --- include/linux/signal.h | 1 + kernel/signal.c | 9 +++++++++ 2 files changed, 10 insertions(+) (limited to 'kernel/signal.c') diff --git a/include/linux/signal.h b/include/linux/signal.h index 7c2744198dba..a2dcb94ea49d 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -286,6 +286,7 @@ struct ksignal { }; extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie); +extern void signal_setup_done(int failed, struct ksignal *ksig, int stepping); extern void signal_delivered(int sig, siginfo_t *info, struct k_sigaction *ka, struct pt_regs *regs, int stepping); extern void exit_signals(struct task_struct *tsk); diff --git a/kernel/signal.c b/kernel/signal.c index 79998f5b0f11..775f5552fa0e 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2396,6 +2396,15 @@ void signal_delivered(int sig, siginfo_t *info, struct k_sigaction *ka, tracehook_signal_handler(sig, info, ka, regs, stepping); } +void signal_setup_done(int failed, struct ksignal *ksig, int stepping) +{ + if (failed) + force_sigsegv(ksig->sig, current); + else + signal_delivered(ksig->sig, &ksig->info, &ksig->ka, + signal_pt_regs(), stepping); +} + /* * It could be that complete_signal() picked us to notify about the * group-wide signal. Other threads should be notified now to take -- cgit v1.2.3 From bde208d2e10b8e8cf01cadadf203f5abcf1e4fe2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 25 Nov 2012 01:36:15 -0500 Subject: switch mips to generic rt_sigsuspend(), make it unconditional mips was the last architecture not using the generic variant. Both native and compat variants switched to generic, which is made unconditional now. Signed-off-by: Al Viro --- arch/mips/kernel/scall64-n32.S | 2 +- arch/mips/kernel/scall64-o32.S | 2 +- arch/mips/kernel/signal.c | 13 ------------- arch/mips/kernel/signal32.c | 17 ----------------- arch/mips/kernel/signal_n32.c | 21 --------------------- kernel/signal.c | 2 -- 6 files changed, 2 insertions(+), 55 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 7388e25984b2..ab34b32f1e34 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -232,7 +232,7 @@ EXPORT(sysn32_call_table) PTR sys_32_rt_sigpending /* 6125 */ PTR compat_sys_rt_sigtimedwait PTR sys_32_rt_sigqueueinfo - PTR sysn32_rt_sigsuspend + PTR compat_sys_rt_sigsuspend PTR compat_sys_sigaltstack PTR compat_sys_utime /* 6130 */ PTR sys_mknod diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index 058a6c1e00a1..144d904cdb22 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -391,7 +391,7 @@ sys_call_table: PTR sys_32_rt_sigpending PTR compat_sys_rt_sigtimedwait PTR sys_32_rt_sigqueueinfo - PTR sys32_rt_sigsuspend + PTR compat_sys_rt_sigsuspend PTR sys_32_pread /* 4200 */ PTR sys_32_pwrite PTR sys_chown diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index eab30865b2bd..f221722a6d43 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -259,19 +259,6 @@ asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs) } #endif -SYSCALL_DEFINE2(rt_sigsuspend, sigset_t __user *,unewset, size_t, sigsetsize) -{ - sigset_t newset; - - /* XXX Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - - if (copy_from_user(&newset, unewset, sizeof(newset))) - return -EFAULT; - return sigsuspend(&newset); -} - #ifdef CONFIG_TRAD_SIGNALS SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act, struct sigaction __user *, oact) diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c index bb3ec6f0863e..ff6146dddf5f 100644 --- a/arch/mips/kernel/signal32.c +++ b/arch/mips/kernel/signal32.c @@ -284,23 +284,6 @@ asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs) return sigsuspend(&newset); } -asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) -{ - compat_sigset_t __user *uset; - sigset_t newset; - size_t sigsetsize; - - /* XXX Don't preclude handling different sized sigset_t's. */ - sigsetsize = regs.regs[5]; - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - - uset = (compat_sigset_t __user *) regs.regs[4]; - if (get_sigset(&newset, uset)) - return -EFAULT; - return sigsuspend(&newset); -} - SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act, struct sigaction32 __user *, oact) { diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c index e62e2bc63a81..5f4ef2ae6199 100644 --- a/arch/mips/kernel/signal_n32.c +++ b/arch/mips/kernel/signal_n32.c @@ -65,27 +65,6 @@ struct rt_sigframe_n32 { struct ucontextn32 rs_uc; }; -extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); - -asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) -{ - compat_sigset_t __user *unewset; - compat_sigset_t uset; - size_t sigsetsize; - sigset_t newset; - - /* XXX Don't preclude handling different sized sigset_t's. */ - sigsetsize = regs.regs[5]; - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - - unewset = (compat_sigset_t __user *) regs.regs[4]; - if (copy_from_user(&uset, unewset, sizeof(uset))) - return -EFAULT; - sigset_from_compat(&newset, &uset); - return sigsuspend(&newset); -} - asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) { struct rt_sigframe_n32 __user *frame; diff --git a/kernel/signal.c b/kernel/signal.c index 775f5552fa0e..87c09e3061d2 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3562,7 +3562,6 @@ int sigsuspend(sigset_t *set) return -ERESTARTNOHAND; } -#ifdef __ARCH_WANT_SYS_RT_SIGSUSPEND /** * sys_rt_sigsuspend - replace the signal mask for a value with the * @unewset value until a signal is received @@ -3603,7 +3602,6 @@ COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_ #endif } #endif -#endif #ifdef CONFIG_OLD_SIGSUSPEND SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask) -- cgit v1.2.3 From e9b04b5b67ec628a5e9a312e14b6864f8f73ba12 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 20 Nov 2012 11:14:10 -0500 Subject: make do_sigaltstack() static Signed-off-by: Al Viro --- include/linux/sched.h | 1 - kernel/signal.c | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) (limited to 'kernel/signal.c') diff --git a/include/linux/sched.h b/include/linux/sched.h index 8f983293b403..6dd06494997a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2259,7 +2259,6 @@ extern struct sigqueue *sigqueue_alloc(void); extern void sigqueue_free(struct sigqueue *); extern int send_sigqueue(struct sigqueue *, struct task_struct *, int group); extern int do_sigaction(int, struct k_sigaction *, struct k_sigaction *); -extern int do_sigaltstack(const stack_t __user *, stack_t __user *, unsigned long); static inline void restore_saved_sigmask(void) { diff --git a/kernel/signal.c b/kernel/signal.c index 87c09e3061d2..6919050c8156 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -3129,7 +3129,7 @@ int do_sigaction(int sig, struct k_sigaction *act, struct k_sigaction *oact) return 0; } -int +static int do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long sp) { stack_t oss; -- cgit v1.2.3 From d64008a8f30e0b381b292788ec6f3ee509b3bb40 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 25 Nov 2012 23:12:10 -0500 Subject: burying unused conditionals __ARCH_WANT_SYS_RT_SIGACTION, __ARCH_WANT_SYS_RT_SIGSUSPEND, __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND, __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} - can be assumed always set. --- arch/Kconfig | 15 --------------- arch/alpha/Kconfig | 1 - arch/alpha/include/asm/unistd.h | 1 - arch/arm/Kconfig | 1 - arch/arm/include/asm/unistd.h | 2 -- arch/arm64/Kconfig | 5 ----- arch/arm64/include/asm/unistd.h | 2 -- arch/avr32/Kconfig | 1 - arch/avr32/include/asm/unistd.h | 2 -- arch/blackfin/Kconfig | 1 - arch/blackfin/include/asm/unistd.h | 2 -- arch/c6x/Kconfig | 1 - arch/cris/Kconfig | 1 - arch/cris/include/asm/unistd.h | 2 -- arch/frv/Kconfig | 1 - arch/frv/include/asm/unistd.h | 2 -- arch/h8300/Kconfig | 1 - arch/h8300/include/asm/unistd.h | 2 -- arch/hexagon/Kconfig | 1 - arch/ia64/Kconfig | 1 - arch/ia64/include/asm/unistd.h | 3 --- arch/m32r/Kconfig | 1 - arch/m32r/include/asm/unistd.h | 2 -- arch/m68k/Kconfig | 1 - arch/m68k/include/asm/unistd.h | 2 -- arch/microblaze/Kconfig | 1 - arch/microblaze/include/asm/unistd.h | 2 -- arch/mips/Kconfig | 5 ----- arch/mips/include/asm/unistd.h | 1 - arch/mn10300/Kconfig | 1 - arch/mn10300/include/asm/unistd.h | 2 -- arch/openrisc/Kconfig | 1 - arch/parisc/Kconfig | 5 ----- arch/parisc/include/asm/unistd.h | 3 --- arch/powerpc/Kconfig | 5 ----- arch/powerpc/include/asm/unistd.h | 4 ---- arch/s390/Kconfig | 5 ----- arch/s390/include/asm/unistd.h | 3 --- arch/score/Kconfig | 1 - arch/sh/Kconfig | 1 - arch/sh/include/asm/unistd.h | 2 -- arch/sparc/Kconfig | 5 ----- arch/sparc/include/asm/unistd.h | 3 --- arch/tile/Kconfig | 5 ----- arch/tile/include/asm/unistd.h | 1 - arch/unicore32/Kconfig | 1 - arch/x86/Kconfig | 4 ---- arch/x86/include/asm/unistd.h | 2 -- arch/x86/um/Kconfig | 1 - arch/xtensa/Kconfig | 1 - arch/xtensa/include/asm/unistd.h | 2 -- include/asm-generic/syscalls.h | 7 ------- include/asm-generic/unistd.h | 3 --- include/linux/compat.h | 14 -------------- include/linux/syscalls.h | 2 -- kernel/signal.c | 12 ------------ 56 files changed, 159 deletions(-) (limited to 'kernel/signal.c') diff --git a/arch/Kconfig b/arch/Kconfig index e50d3af294d4..956756c27ac6 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -356,21 +356,6 @@ config MODULES_USE_ELF_REL Modules only use ELF REL relocations. Modules with ELF RELA relocations will give an error. -config GENERIC_SIGALTSTACK - bool - -config GENERIC_COMPAT_RT_SIGPROCMASK - bool - -config GENERIC_COMPAT_RT_SIGPENDING - bool - -config GENERIC_COMPAT_RT_SIGQUEUEINFO - bool - -config GENERIC_COMPAT_RT_SIGACTION - bool - # # ABI hall of shame # diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 15740cf29bd4..dd083c403ab3 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -22,7 +22,6 @@ config ALPHA select GENERIC_STRNLEN_USER select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK select ODD_RT_SIGACTION select OLD_SIGSUSPEND help diff --git a/arch/alpha/include/asm/unistd.h b/arch/alpha/include/asm/unistd.h index b3396ee039b7..6d6fe7ab5473 100644 --- a/arch/alpha/include/asm/unistd.h +++ b/arch/alpha/include/asm/unistd.h @@ -14,7 +14,6 @@ #define __ARCH_WANT_SYS_OLD_GETRLIMIT #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index db3152d6dd88..fcb406633328 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -56,7 +56,6 @@ config ARM select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND select MODULES_USE_ELF_REL select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND3 select OLD_SIGACTION help diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h index 21a2700d2957..e4ddfb39ca34 100644 --- a/arch/arm/include/asm/unistd.h +++ b/arch/arm/include/asm/unistd.h @@ -26,8 +26,6 @@ #define __ARCH_WANT_SYS_NICE #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_OLD_MMAP #define __ARCH_WANT_SYS_OLD_SELECT diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1f27c58f44ad..626ab20f12ea 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -6,15 +6,10 @@ config ARM64 select CLONE_BACKWARDS select COMMON_CLK select GENERIC_CLOCKEVENTS - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGPENDING - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGQUEUEINFO select GENERIC_HARDIRQS_NO_DEPRECATED select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW - select GENERIC_SIGALTSTACK select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select HARDIRQS_SW_RESEND diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 744087fb521c..82ce217e94cf 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -20,10 +20,8 @@ #define __ARCH_WANT_SYS_GETPGRP #define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_NICE -#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_COMPAT_SYS_SENDFILE #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig index e888b72b6e10..2ae6591b3a55 100644 --- a/arch/avr32/Kconfig +++ b/arch/avr32/Kconfig @@ -17,7 +17,6 @@ config AVR32 select GENERIC_CLOCKEVENTS select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK help AVR32 is a high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular diff --git a/arch/avr32/include/asm/unistd.h b/arch/avr32/include/asm/unistd.h index 0bdf6371574e..dc4d5a931112 100644 --- a/arch/avr32/include/asm/unistd.h +++ b/arch/avr32/include/asm/unistd.h @@ -37,8 +37,6 @@ #define __ARCH_WANT_SYS_GETPGRP #define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_GETPGRP -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index a8a9ca7d40f3..b6f3ad5441c5 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -45,7 +45,6 @@ config BLACKFIN select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK config GENERIC_CSUM def_bool y diff --git a/arch/blackfin/include/asm/unistd.h b/arch/blackfin/include/asm/unistd.h index e943cb130048..04e83ea8d5cc 100644 --- a/arch/blackfin/include/asm/unistd.h +++ b/arch/blackfin/include/asm/unistd.h @@ -18,8 +18,6 @@ #define __ARCH_WANT_SYS_GETPGRP #define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_NICE -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_VFORK /* diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig index 12d97b7ef0dc..f6a3648f5ec3 100644 --- a/arch/c6x/Kconfig +++ b/arch/c6x/Kconfig @@ -18,7 +18,6 @@ config C6X select OF_EARLY_FLATTREE select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK config MMU def_bool n diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index c2a1d0a8924c..0e5c187ac7d2 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -50,7 +50,6 @@ config CRIS select GENERIC_CMOS_UPDATE select MODULES_USE_ELF_RELA select CLONE_BACKWARDS2 - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND select OLD_SIGACTION diff --git a/arch/cris/include/asm/unistd.h b/arch/cris/include/asm/unistd.h index 6d062bdf92d4..be57a988bfb9 100644 --- a/arch/cris/include/asm/unistd.h +++ b/arch/cris/include/asm/unistd.h @@ -30,8 +30,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index e3f8ffdd4e7b..b7465cd3dbbb 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -12,7 +12,6 @@ config FRV select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CPU_DEVICES select ARCH_WANT_IPC_PARSE_VERSION - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND3 select OLD_SIGACTION diff --git a/arch/frv/include/asm/unistd.h b/arch/frv/include/asm/unistd.h index d685da17f5fb..4cfcc7bba25a 100644 --- a/arch/frv/include/asm/unistd.h +++ b/arch/frv/include/asm/unistd.h @@ -27,8 +27,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT /* #define __ARCH_WANT_SYS_SIGPENDING */ #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 0b0176ce2c35..05b613af223a 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -9,7 +9,6 @@ config H8300 select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND3 select OLD_SIGACTION diff --git a/arch/h8300/include/asm/unistd.h b/arch/h8300/include/asm/unistd.h index aa38105959fb..6721856d841b 100644 --- a/arch/h8300/include/asm/unistd.h +++ b/arch/h8300/include/asm/unistd.h @@ -29,8 +29,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 3e6e27c11f93..0744f7d7b1fd 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -31,7 +31,6 @@ config HEXAGON select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK ---help--- Qualcomm Hexagon is a processor architecture designed for high performance and low power across a wide variety of applications. diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 98482d1cbc5b..3279646120e3 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -42,7 +42,6 @@ config IA64 select GENERIC_TIME_VSYSCALL_OLD select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK default y help The Itanium Processor Family is Intel's 64-bit successor to diff --git a/arch/ia64/include/asm/unistd.h b/arch/ia64/include/asm/unistd.h index c827049eb62c..096373800f73 100644 --- a/arch/ia64/include/asm/unistd.h +++ b/arch/ia64/include/asm/unistd.h @@ -27,9 +27,6 @@ #define __IGNORE_vfork /* clone() */ #define __IGNORE_umount2 /* umount() */ -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND - #if !defined(__ASSEMBLY__) && !defined(ASSEMBLER) #include diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index 1f550d4dd5d0..f807721e19a5 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -15,7 +15,6 @@ config M32R select GENERIC_ATOMIC64 select ARCH_USES_GETTIMEOFFSET select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK config SBUS bool diff --git a/arch/m32r/include/asm/unistd.h b/arch/m32r/include/asm/unistd.h index 79b063caec85..555629b05267 100644 --- a/arch/m32r/include/asm/unistd.h +++ b/arch/m32r/include/asm/unistd.h @@ -20,8 +20,6 @@ #define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_OLD_GETRLIMIT /*will be unused*/ #define __ARCH_WANT_SYS_OLDUMOUNT -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_CLONE #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index a358bf63defe..efb1ce1f14a3 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -18,7 +18,6 @@ config M68K select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_REL select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND3 select OLD_SIGACTION diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h index 847994ce6804..df19631cc4de 100644 --- a/arch/m68k/include/asm/unistd.h +++ b/arch/m68k/include/asm/unistd.h @@ -29,8 +29,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 5e30d75c74ed..ba3b7c8c04b8 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -27,7 +27,6 @@ config MICROBLAZE select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK config SWAP def_bool n diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h index 10f8ac186855..b3778391d9cc 100644 --- a/arch/microblaze/include/asm/unistd.h +++ b/arch/microblaze/include/asm/unistd.h @@ -33,8 +33,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_CLONE #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_FORK diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0772b5c5bc72..a3d4646098fe 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -42,11 +42,6 @@ config MIPS select MODULES_USE_ELF_REL if MODULES select MODULES_USE_ELF_RELA if MODULES && 64BIT select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING menu "Machine selection" diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h index 06f6463c24ad..64f661e32879 100644 --- a/arch/mips/include/asm/unistd.h +++ b/arch/mips/include/asm/unistd.h @@ -35,7 +35,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION # ifdef CONFIG_32BIT # define __ARCH_WANT_STAT64 # define __ARCH_WANT_SYS_TIME diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig index 12bf06f9abe5..ad0caea0bfea 100644 --- a/arch/mn10300/Kconfig +++ b/arch/mn10300/Kconfig @@ -10,7 +10,6 @@ config MN10300 select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND3 select OLD_SIGACTION diff --git a/arch/mn10300/include/asm/unistd.h b/arch/mn10300/include/asm/unistd.h index e6d2ed4ba68f..7f9d9adfa51e 100644 --- a/arch/mn10300/include/asm/unistd.h +++ b/arch/mn10300/include/asm/unistd.h @@ -41,8 +41,6 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index d3632eb98a1c..0ac66f67521f 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -22,7 +22,6 @@ config OPENRISC select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK config MMU def_bool y diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 2bd407ffaebf..b77feffbadea 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -23,11 +23,6 @@ config PARISC select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING help The PA-RISC microprocessor is designed by Hewlett-Packard and used diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h index 3043194547cd..93b1d089864b 100644 --- a/arch/parisc/include/asm/unistd.h +++ b/arch/parisc/include/asm/unistd.h @@ -160,9 +160,6 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND -#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK #define __ARCH_WANT_SYS_CLONE diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index ec89a7b11f7b..cf90f0526411 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -144,11 +144,6 @@ config PPC select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING select OLD_SIGSUSPEND select OLD_SIGACTION if PPC32 diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index 1d4864a40e35..f25b5c45c435 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -44,17 +44,13 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #ifdef CONFIG_PPC32 #define __ARCH_WANT_OLD_STAT #endif #ifdef CONFIG_PPC64 #define __ARCH_WANT_COMPAT_SYS_TIME -#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_NEWFSTATAT #define __ARCH_WANT_COMPAT_SYS_SENDFILE -#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL #endif #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index bcdcf31fa672..ec12a3582ae9 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -140,11 +140,6 @@ config S390 select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS2 - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING select OLD_SIGSUSPEND3 select OLD_SIGACTION diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h index 636530872516..a6667a952969 100644 --- a/arch/s390/include/asm/unistd.h +++ b/arch/s390/include/asm/unistd.h @@ -43,15 +43,12 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND # ifndef CONFIG_64BIT # define __ARCH_WANT_STAT64 # define __ARCH_WANT_SYS_TIME # endif # ifdef CONFIG_COMPAT # define __ARCH_WANT_COMPAT_SYS_TIME -# define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND # endif #define __ARCH_WANT_SYS_FORK #define __ARCH_WANT_SYS_VFORK diff --git a/arch/score/Kconfig b/arch/score/Kconfig index a125d7207bcc..3b1482e7afac 100644 --- a/arch/score/Kconfig +++ b/arch/score/Kconfig @@ -14,7 +14,6 @@ config SCORE select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_REL select CLONE_BACKWARDS - select GENERIC_SIGALTSTACK choice prompt "System type" diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index b5fd9f3c9925..5f9b0a3f5f00 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -40,7 +40,6 @@ config SUPERH select GENERIC_STRNLEN_USER select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK select OLD_SIGSUSPEND select OLD_SIGACTION help diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h index 012004ed3330..5e90fa2b7eed 100644 --- a/arch/sh/include/asm/unistd.h +++ b/arch/sh/include/asm/unistd.h @@ -4,7 +4,6 @@ # include # endif -# define __ARCH_WANT_SYS_RT_SIGSUSPEND # define __ARCH_WANT_OLD_READDIR # define __ARCH_WANT_OLD_STAT # define __ARCH_WANT_STAT64 @@ -27,7 +26,6 @@ # define __ARCH_WANT_SYS_OLDUMOUNT # define __ARCH_WANT_SYS_SIGPENDING # define __ARCH_WANT_SYS_SIGPROCMASK -# define __ARCH_WANT_SYS_RT_SIGACTION # define __ARCH_WANT_SYS_FORK # define __ARCH_WANT_SYS_VFORK # define __ARCH_WANT_SYS_CLONE diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index e557b0821540..9821a0ff9864 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -42,11 +42,6 @@ config SPARC select GENERIC_STRNLEN_USER select MODULES_USE_ELF_RELA select ODD_RT_SIGACTION - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING - select GENERIC_COMPAT_RT_SIGACTION select OLD_SIGSUSPEND config SPARC32 diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h index 87ce24c5eb95..5356810bd7e7 100644 --- a/arch/sparc/include/asm/unistd.h +++ b/arch/sparc/include/asm/unistd.h @@ -38,14 +38,11 @@ #define __ARCH_WANT_SYS_OLDUMOUNT #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #ifdef __32bit_syscall_numbers__ #define __ARCH_WANT_SYS_IPC #else #define __ARCH_WANT_COMPAT_SYS_TIME -#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_COMPAT_SYS_SENDFILE -#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL #endif /* diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 96a717ebb1fa..875d008828b8 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -21,11 +21,6 @@ config TILE select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_CLOCKEVENTS select MODULES_USE_ELF_RELA - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPROCMASK - select GENERIC_COMPAT_RT_SIGPENDING # FIXME: investigate whether we need/want these options. # select HAVE_IOREMAP_PROT diff --git a/arch/tile/include/asm/unistd.h b/arch/tile/include/asm/unistd.h index 6ac21034f69a..940831fe9e94 100644 --- a/arch/tile/include/asm/unistd.h +++ b/arch/tile/include/asm/unistd.h @@ -14,7 +14,6 @@ /* In compat mode, we use sys_llseek() for compat_sys_llseek(). */ #ifdef CONFIG_COMPAT #define __ARCH_WANT_SYS_LLSEEK -#define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL #endif #define __ARCH_WANT_SYS_NEWFSTATAT #define __ARCH_WANT_SYS_CLONE diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index a62786fdcaab..60651df5f952 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -16,7 +16,6 @@ config UNICORE32 select ARCH_WANT_FRAME_POINTERS select GENERIC_IOMAP select MODULES_USE_ELF_REL - select GENERIC_SIGALTSTACK help UniCore-32 is 32-bit Instruction Set Architecture, including a series of low-power-consumption RISC chip diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 87d09175a0a9..49fb44e95f3c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -113,10 +113,6 @@ config X86 select MODULES_USE_ELF_REL if X86_32 select MODULES_USE_ELF_RELA if X86_64 select CLONE_BACKWARDS if X86_32 - select GENERIC_SIGALTSTACK - select GENERIC_COMPAT_RT_SIGACTION - select GENERIC_COMPAT_RT_SIGQUEUEINFO - select GENERIC_COMPAT_RT_SIGPENDING select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION select OLD_SIGACTION if X86_32 select COMPAT_OLD_SIGACTION if IA32_EMULATION diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h index a0790e07ba65..3d5df1c4447f 100644 --- a/arch/x86/include/asm/unistd.h +++ b/arch/x86/include/asm/unistd.h @@ -38,8 +38,6 @@ # define __ARCH_WANT_SYS_OLD_GETRLIMIT # define __ARCH_WANT_SYS_OLD_UNAME # define __ARCH_WANT_SYS_PAUSE -# define __ARCH_WANT_SYS_RT_SIGACTION -# define __ARCH_WANT_SYS_RT_SIGSUSPEND # define __ARCH_WANT_SYS_SGETMASK # define __ARCH_WANT_SYS_SIGNAL # define __ARCH_WANT_SYS_SIGPENDING diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index cf0f2731484e..fafc94193bc8 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -13,7 +13,6 @@ endmenu config UML_X86 def_bool y select GENERIC_FIND_FIRST_BIT - select GENERIC_SIGALTSTACK config 64BIT bool "64-bit kernel" if SUBARCH = "x86" diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 23cc6ae35da0..5aab1acabf1c 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -16,7 +16,6 @@ config XTENSA select ARCH_WANT_OPTIONAL_GPIOLIB select CLONE_BACKWARDS select IRQ_DOMAIN - select GENERIC_SIGALTSTACK help Xtensa processors are 32-bit RISC machines designed by Tensilica primarily for embedded systems. These processors are both diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h index eb63ea87815c..c38834de9ac7 100644 --- a/arch/xtensa/include/asm/unistd.h +++ b/arch/xtensa/include/asm/unistd.h @@ -15,8 +15,6 @@ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_UTIME #define __ARCH_WANT_SYS_LLSEEK -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_GETPGRP /* diff --git a/include/asm-generic/syscalls.h b/include/asm-generic/syscalls.h index 9e25a3179d6c..1f74be5113b2 100644 --- a/include/asm-generic/syscalls.h +++ b/include/asm-generic/syscalls.h @@ -21,13 +21,6 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, unsigned long fd, off_t pgoff); #endif -#ifndef CONFIG_GENERIC_SIGALTSTACK -#ifndef sys_sigaltstack -asmlinkage long sys_sigaltstack(const stack_t __user *, stack_t __user *, - struct pt_regs *); -#endif -#endif - #ifndef sys_rt_sigreturn asmlinkage long sys_rt_sigreturn(struct pt_regs *regs); #endif diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h index a36991ab334e..257c55ec4f77 100644 --- a/include/asm-generic/unistd.h +++ b/include/asm-generic/unistd.h @@ -9,9 +9,6 @@ #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_LLSEEK #endif -#define __ARCH_WANT_SYS_RT_SIGACTION -#define __ARCH_WANT_SYS_RT_SIGSUSPEND -#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND /* * "Conditional" syscalls diff --git a/include/linux/compat.h b/include/linux/compat.h index 8de903587fb9..de095b0462a7 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -68,7 +68,6 @@ #ifndef compat_user_stack_pointer #define compat_user_stack_pointer() current_user_stack_pointer() #endif -#ifdef CONFIG_GENERIC_SIGALTSTACK #ifndef compat_sigaltstack /* we'll need that for MIPS */ typedef struct compat_sigaltstack { compat_uptr_t ss_sp; @@ -76,7 +75,6 @@ typedef struct compat_sigaltstack { compat_size_t ss_size; } compat_stack_t; #endif -#endif #define compat_jiffies_to_clock_t(x) \ (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) @@ -142,7 +140,6 @@ typedef struct { compat_sigset_word sig[_COMPAT_NSIG_WORDS]; } compat_sigset_t; -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION struct compat_sigaction { #ifndef __ARCH_HAS_ODD_SIGACTION compat_uptr_t sa_handler; @@ -156,7 +153,6 @@ struct compat_sigaction { #endif compat_sigset_t sa_mask __packed; }; -#endif /* * These functions operate strictly on struct compat_time* @@ -623,27 +619,19 @@ asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, struct compat_timespec __user *uts, compat_size_t sigsetsize); asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize); -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, compat_size_t sigsetsize); -#endif -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPENDING asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, compat_size_t sigsetsize); -#endif #ifndef CONFIG_ODD_RT_SIGACTION -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION asmlinkage long compat_sys_rt_sigaction(int, const struct compat_sigaction __user *, struct compat_sigaction __user *, compat_size_t); #endif -#endif -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo); -#endif asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info); asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg); @@ -694,13 +682,11 @@ asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid, asmlinkage long compat_sys_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, compat_size_t count); -#ifdef CONFIG_GENERIC_SIGALTSTACK asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr, compat_stack_t __user *uoss_ptr); int compat_restore_altstack(const compat_stack_t __user *uss); int __compat_save_altstack(compat_stack_t __user *, unsigned long); -#endif asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval); diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 66d298f69f98..313a8e0a6553 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -300,10 +300,8 @@ asmlinkage long sys_personality(unsigned int personality); asmlinkage long sys_sigpending(old_sigset_t __user *set); asmlinkage long sys_sigprocmask(int how, old_sigset_t __user *set, old_sigset_t __user *oset); -#ifdef CONFIG_GENERIC_SIGALTSTACK asmlinkage long sys_sigaltstack(const struct sigaltstack __user *uss, struct sigaltstack __user *uoss); -#endif asmlinkage long sys_getitimer(int which, struct itimerval __user *value); asmlinkage long sys_setitimer(int which, diff --git a/kernel/signal.c b/kernel/signal.c index 6919050c8156..2b8282bb487c 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2623,7 +2623,6 @@ SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset, } #ifdef CONFIG_COMPAT -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPROCMASK COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, compat_sigset_t __user *, oset, compat_size_t, sigsetsize) { @@ -2661,7 +2660,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, #endif } #endif -#endif static int do_sigpending(void *set, unsigned long sigsetsize) { @@ -2694,7 +2692,6 @@ SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize) } #ifdef CONFIG_COMPAT -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGPENDING COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset, compat_size_t, sigsetsize) { @@ -2714,7 +2711,6 @@ COMPAT_SYSCALL_DEFINE2(rt_sigpending, compat_sigset_t __user *, uset, #endif } #endif -#endif #ifndef HAVE_ARCH_COPY_SIGINFO_TO_USER @@ -3024,7 +3020,6 @@ SYSCALL_DEFINE3(rt_sigqueueinfo, pid_t, pid, int, sig, } #ifdef CONFIG_COMPAT -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGQUEUEINFO COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo, compat_pid_t, pid, int, sig, @@ -3037,7 +3032,6 @@ COMPAT_SYSCALL_DEFINE3(rt_sigqueueinfo, return do_rt_sigqueueinfo(pid, sig, &info); } #endif -#endif static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) { @@ -3194,12 +3188,10 @@ do_sigaltstack (const stack_t __user *uss, stack_t __user *uoss, unsigned long s out: return error; } -#ifdef CONFIG_GENERIC_SIGALTSTACK SYSCALL_DEFINE2(sigaltstack,const stack_t __user *,uss, stack_t __user *,uoss) { return do_sigaltstack(uss, uoss, current_user_stack_pointer()); } -#endif int restore_altstack(const stack_t __user *uss) { @@ -3217,7 +3209,6 @@ int __save_altstack(stack_t __user *uss, unsigned long sp) } #ifdef CONFIG_COMPAT -#ifdef CONFIG_GENERIC_SIGALTSTACK COMPAT_SYSCALL_DEFINE2(sigaltstack, const compat_stack_t __user *, uss_ptr, compat_stack_t __user *, uoss_ptr) @@ -3267,7 +3258,6 @@ int __compat_save_altstack(compat_stack_t __user *uss, unsigned long sp) __put_user(t->sas_ss_size, &uss->ss_size); } #endif -#endif #ifdef __ARCH_WANT_SYS_SIGPENDING @@ -3368,7 +3358,6 @@ out: return ret; } #ifdef CONFIG_COMPAT -#ifdef CONFIG_GENERIC_COMPAT_RT_SIGACTION COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, const struct compat_sigaction __user *, act, struct compat_sigaction __user *, oact, @@ -3415,7 +3404,6 @@ COMPAT_SYSCALL_DEFINE4(rt_sigaction, int, sig, return ret; } #endif -#endif #endif /* !CONFIG_ODD_RT_SIGACTION */ #ifdef CONFIG_OLD_SIGACTION -- cgit v1.2.3 From 66dd34ad31e5963d72a700ec3f2449291d322921 Mon Sep 17 00:00:00 2001 From: Andrey Vagin Date: Wed, 27 Feb 2013 17:03:12 -0800 Subject: signal: allow to send any siginfo to itself The idea is simple. We need to get the siginfo for each signal on checkpointing dump, and then return it back on restore. The first problem is that the kernel doesn't report complete siginfos to userspace. In a signal handler the kernel strips SI_CODE from siginfo. When a siginfo is received from signalfd, it has a different format with fixed sizes of fields. The interface of signalfd was extended. If a signalfd is created with the flag SFD_RAW, it returns siginfo in a raw format. rt_sigqueueinfo looks suitable for restoring signals, but it can't send siginfo with a positive si_code, because these codes are reserved for the kernel. In the real world each person has right to do anything with himself, so I think a process should able to send any siginfo to itself. This patch: The kernel prevents sending of siginfo with positive si_code, because these codes are reserved for kernel. I think we can allow a task to send such a siginfo to itself. This operation should not be dangerous. This functionality is required for restoring signals in checkpoint/restart. Signed-off-by: Andrey Vagin Cc: Serge Hallyn Cc: "Eric W. Biederman" Cc: Al Viro Cc: Michael Kerrisk Cc: Pavel Emelyanov Cc: Cyrill Gorcunov Cc: Michael Kerrisk Reviewed-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/signal.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 2a7ae2963185..c6209135cca4 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2996,7 +2996,8 @@ static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info) /* Not even root can pretend to send signals from the kernel. * Nor can they impersonate a kill()/tgkill(), which adds source info. */ - if (info->si_code >= 0 || info->si_code == SI_TKILL) { + if ((info->si_code >= 0 || info->si_code == SI_TKILL) && + (task_pid_vnr(current) != pid)) { /* We used to allow any < 0 si_code */ WARN_ON_ONCE(info->si_code < 0); return -EPERM; @@ -3045,7 +3046,8 @@ static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info) /* Not even root can pretend to send signals from the kernel. * Nor can they impersonate a kill()/tgkill(), which adds source info. */ - if (info->si_code >= 0 || info->si_code == SI_TKILL) { + if (((info->si_code >= 0 || info->si_code == SI_TKILL)) && + (task_pid_vnr(current) != pid)) { /* We used to allow any < 0 si_code */ WARN_ON_ONCE(info->si_code < 0); return -EPERM; -- cgit v1.2.3 From 5d1fadc1472396d602f0eeb10d37519e2a14e8bc Mon Sep 17 00:00:00 2001 From: Valdis Kletnieks Date: Wed, 27 Feb 2013 17:03:13 -0800 Subject: kernel/signal.c: fix suboptimal printk usage Several printk's were missing KERN_INFO and KERN_CONT flags. In addition, a printk that was outside a #if/#endif should have been inside, which would result in stray blank line on non-x86 boxes. Signed-off-by: Valdis Kletnieks Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/signal.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index c6209135cca4..2676aac4103d 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1157,11 +1157,11 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, static void print_fatal_signal(int signr) { struct pt_regs *regs = signal_pt_regs(); - printk("%s/%d: potentially unexpected fatal signal %d.\n", + printk(KERN_INFO "%s/%d: potentially unexpected fatal signal %d.\n", current->comm, task_pid_nr(current), signr); #if defined(__i386__) && !defined(__arch_um__) - printk("code at %08lx: ", regs->ip); + printk(KERN_INFO "code at %08lx: ", regs->ip); { int i; for (i = 0; i < 16; i++) { @@ -1169,11 +1169,11 @@ static void print_fatal_signal(int signr) if (get_user(insn, (unsigned char *)(regs->ip + i))) break; - printk("%02x ", insn); + printk(KERN_CONT "%02x ", insn); } } + printk(KERN_CONT "\n"); #endif - printk("\n"); preempt_disable(); show_regs(regs); preempt_enable(); -- cgit v1.2.3 From db61ec29fd56e089007cb7d9a646ea9ddf518c4d Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 2 Mar 2013 20:39:15 -0500 Subject: fix compat_sys_rt_sigprocmask() Converting bitmask to 32bit granularity is fine, but we'd better _do_ something with the result. Such as "copy it to userland"... Signed-off-by: Al Viro --- kernel/signal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 2a7ae2963185..8d1b785f0dc9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2653,7 +2653,7 @@ COMPAT_SYSCALL_DEFINE4(rt_sigprocmask, int, how, compat_sigset_t __user *, nset, if (oset) { compat_sigset_t old32; sigset_to_compat(&old32, &old_set); - if (copy_to_user(oset, &old_set, sizeof(sigset_t))) + if (copy_to_user(oset, &old32, sizeof(compat_sigset_t))) return -EFAULT; } return 0; -- cgit v1.2.3 From 20f22ab42e9c832bde6e9a7ed04cdc73ec737e5b Mon Sep 17 00:00:00 2001 From: Randy Dunlap Date: Mon, 4 Mar 2013 14:32:59 -0800 Subject: signals: fix new kernel-doc warnings Fix new kernel-doc warnings in kernel/signal.c: Warning(kernel/signal.c:2689): No description found for parameter 'uset' Warning(kernel/signal.c:2689): Excess function parameter 'set' description in 'sys_rt_sigpending' Signed-off-by: Randy Dunlap Cc: Alexander Viro Signed-off-by: Linus Torvalds --- kernel/signal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 2ec870a4c3c4..d63c79e7e415 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2682,7 +2682,7 @@ static int do_sigpending(void *set, unsigned long sigsetsize) /** * sys_rt_sigpending - examine a pending signal that has been raised * while blocked - * @set: stores pending signals + * @uset: stores pending signals * @sigsetsize: size of sigset_t type or larger */ SYSCALL_DEFINE2(rt_sigpending, sigset_t __user *, uset, size_t, sigsetsize) -- cgit v1.2.3 From 2ca39528c01a933f6689cd6505ce65bd6d68a530 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 13 Mar 2013 14:59:33 -0700 Subject: signal: always clear sa_restorer on execve When the new signal handlers are set up, the location of sa_restorer is not cleared, leaking a parent process's address space location to children. This allows for a potential bypass of the parent's ASLR by examining the sa_restorer value returned when calling sigaction(). Based on what should be considered "secret" about addresses, it only matters across the exec not the fork (since the VMAs haven't changed until the exec). But since exec sets SIG_DFL and keeps sa_restorer, this is where it should be fixed. Given the few uses of sa_restorer, a "set" function was not written since this would be the only use. Instead, we use __ARCH_HAS_SA_RESTORER, as already done in other places. Example of the leak before applying this patch: $ cat /proc/$$/maps ... 7fb9f3083000-7fb9f3238000 r-xp 00000000 fd:01 404469 .../libc-2.15.so ... $ ./leak ... 7f278bc74000-7f278be29000 r-xp 00000000 fd:01 404469 .../libc-2.15.so ... 1 0 (nil) 0x7fb9f30b94a0 2 4000000 (nil) 0x7f278bcaa4a0 3 4000000 (nil) 0x7f278bcaa4a0 4 0 (nil) 0x7fb9f30b94a0 ... [akpm@linux-foundation.org: use SA_RESTORER for backportability] Signed-off-by: Kees Cook Reported-by: Emese Revfy Cc: Emese Revfy Cc: PaX Team Cc: Al Viro Cc: Oleg Nesterov Cc: "Eric W. Biederman" Cc: Serge Hallyn Cc: Julien Tinnes Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/signal.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index d63c79e7e415..43b0d4a1b7ba 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -485,6 +485,9 @@ flush_signal_handlers(struct task_struct *t, int force_default) if (force_default || ka->sa.sa_handler != SIG_IGN) ka->sa.sa_handler = SIG_DFL; ka->sa.sa_flags = 0; +#ifdef SA_RESTORER + ka->sa.sa_restorer = NULL; +#endif sigemptyset(&ka->sa.sa_mask); ka++; } -- cgit v1.2.3 From 522cff142d7d2f9230839c9e1f21a4d8bcc22a4a Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Wed, 13 Mar 2013 14:59:34 -0700 Subject: kernel/signal.c: use __ARCH_HAS_SA_RESTORER instead of SA_RESTORER __ARCH_HAS_SA_RESTORER is the preferred conditional for use in 3.9 and later kernels, per Kees. Cc: Emese Revfy Cc: Emese Revfy Cc: PaX Team Cc: Al Viro Cc: Oleg Nesterov Cc: "Eric W. Biederman" Cc: Serge Hallyn Cc: Julien Tinnes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/signal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/signal.c') diff --git a/kernel/signal.c b/kernel/signal.c index 43b0d4a1b7ba..dd72567767d9 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -485,7 +485,7 @@ flush_signal_handlers(struct task_struct *t, int force_default) if (force_default || ka->sa.sa_handler != SIG_IGN) ka->sa.sa_handler = SIG_DFL; ka->sa.sa_flags = 0; -#ifdef SA_RESTORER +#ifdef __ARCH_HAS_SA_RESTORER ka->sa.sa_restorer = NULL; #endif sigemptyset(&ka->sa.sa_mask); -- cgit v1.2.3