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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-08 21:48:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-08 21:48:15 -0700
commit5ad18b2e60b75c7297a998dea702451d33a052ed (patch)
treec47fb503b4cfc8d3e99ad425aadede9832e96dc4 /arch/s390
parent92c1d6522135050cb377a18cc6e30d08dfb87efb (diff)
parent318759b4737c3b3789e2fd64d539f437d52386f5 (diff)
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull force_sig() argument change from Eric Biederman: "A source of error over the years has been that force_sig has taken a task parameter when it is only safe to use force_sig with the current task. The force_sig function is built for delivering synchronous signals such as SIGSEGV where the userspace application caused a synchronous fault (such as a page fault) and the kernel responded with a signal. Because the name force_sig does not make this clear, and because the force_sig takes a task parameter the function force_sig has been abused for sending other kinds of signals over the years. Slowly those have been fixed when the oopses have been tracked down. This set of changes fixes the remaining abusers of force_sig and carefully rips out the task parameter from force_sig and friends making this kind of error almost impossible in the future" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (27 commits) signal/x86: Move tsk inside of CONFIG_MEMORY_FAILURE in do_sigbus signal: Remove the signal number and task parameters from force_sig_info signal: Factor force_sig_info_to_task out of force_sig_info signal: Generate the siginfo in force_sig signal: Move the computation of force into send_signal and correct it. signal: Properly set TRACE_SIGNAL_LOSE_INFO in __send_signal signal: Remove the task parameter from force_sig_fault signal: Use force_sig_fault_to_task for the two calls that don't deliver to current signal: Explicitly call force_sig_fault on current signal/unicore32: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from ptrace_break signal/nds32: Remove tsk parameter from send_sigtrap signal/riscv: Remove tsk parameter from do_trap signal/sh: Remove tsk parameter from force_sig_info_fault signal/um: Remove task parameter from send_sigtrap signal/x86: Remove task parameter from send_sigtrap signal: Remove task parameter from force_sig_mceerr signal: Remove task parameter from force_sig signal: Remove task parameter from force_sigsegv ...
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/compat_signal.c4
-rw-r--r--arch/s390/kernel/signal.c4
-rw-r--r--arch/s390/kernel/traps.c6
-rw-r--r--arch/s390/mm/fault.c6
4 files changed, 9 insertions, 11 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 6f2a193ccccc..38d4bdbc34b9 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -194,7 +194,7 @@ COMPAT_SYSCALL_DEFINE0(sigreturn)
load_sigregs();
return regs->gprs[2];
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return 0;
}
@@ -217,7 +217,7 @@ COMPAT_SYSCALL_DEFINE0(rt_sigreturn)
load_sigregs();
return regs->gprs[2];
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return 0;
}
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 22f08245aa5d..e6fca5498e1f 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -232,7 +232,7 @@ SYSCALL_DEFINE0(sigreturn)
load_sigregs();
return regs->gprs[2];
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return 0;
}
@@ -256,7 +256,7 @@ SYSCALL_DEFINE0(rt_sigreturn)
load_sigregs();
return regs->gprs[2];
badframe:
- force_sig(SIGSEGV, current);
+ force_sig(SIGSEGV);
return 0;
}
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 4736b6ec0ad2..164c0282b41a 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -45,7 +45,7 @@ int is_valid_bugaddr(unsigned long addr)
void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
{
if (user_mode(regs)) {
- force_sig_fault(si_signo, si_code, get_trap_ip(regs), current);
+ force_sig_fault(si_signo, si_code, get_trap_ip(regs));
report_user_fault(regs, si_signo, 0);
} else {
const struct exception_table_entry *fixup;
@@ -79,7 +79,7 @@ void do_per_trap(struct pt_regs *regs)
if (!current->ptrace)
return;
force_sig_fault(SIGTRAP, TRAP_HWBKPT,
- (void __force __user *) current->thread.per_event.address, current);
+ (void __force __user *) current->thread.per_event.address);
}
NOKPROBE_SYMBOL(do_per_trap);
@@ -165,7 +165,7 @@ void illegal_op(struct pt_regs *regs)
return;
if (*((__u16 *) opcode) == S390_BREAKPOINT_U16) {
if (current->ptrace)
- force_sig_fault(SIGTRAP, TRAP_BRKPT, location, current);
+ force_sig_fault(SIGTRAP, TRAP_BRKPT, location);
else
signal = SIGILL;
#ifdef CONFIG_UPROBES
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index df75d574246d..0ba174f779da 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -248,8 +248,7 @@ static noinline void do_sigsegv(struct pt_regs *regs, int si_code)
{
report_user_fault(regs, SIGSEGV, 1);
force_sig_fault(SIGSEGV, si_code,
- (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK),
- current);
+ (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK));
}
const struct exception_table_entry *s390_search_extables(unsigned long addr)
@@ -310,8 +309,7 @@ static noinline void do_sigbus(struct pt_regs *regs)
* or user mode.
*/
force_sig_fault(SIGBUS, BUS_ADRERR,
- (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK),
- current);
+ (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK));
}
static noinline int signal_return(struct pt_regs *regs)