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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-05 17:09:27 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-05 17:09:27 -0700 |
commit | 55a7b2125cf4739a8478d2d7223310ae7393408c (patch) | |
tree | 8beb7d6a335d744998f559745de8fb9702871a51 /arch/arm64/kernel/ptrace.c | |
parent | e5f76a2e0e84ca2a215ecbf6feae88780d055c56 (diff) | |
parent | 425e1ed73e6574e4fe186ec82fd37213cbd47df0 (diff) |
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
- RAS reporting via GHES/APEI (ACPI)
- Indirect ftrace trampolines for modules
- Improvements to kernel fault reporting
- Page poisoning
- Sigframe cleanups and preparation for SVE context
- Core dump fixes
- Sparse fixes (mainly relating to endianness)
- xgene SoC PMU v3 driver
- Misc cleanups and non-critical fixes
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (75 commits)
arm64: fix endianness annotation for 'struct jit_ctx' and friends
arm64: cpuinfo: constify attribute_group structures.
arm64: ptrace: Fix incorrect get_user() use in compat_vfp_set()
arm64: ptrace: Remove redundant overrun check from compat_vfp_set()
arm64: ptrace: Avoid setting compat FP[SC]R to garbage if get_user fails
arm64: fix endianness annotation for __apply_alternatives()/get_alt_insn()
arm64: fix endianness annotation in get_kaslr_seed()
arm64: add missing conversion to __wsum in ip_fast_csum()
arm64: fix endianness annotation in acpi_parking_protocol.c
arm64: use readq() instead of readl() to read 64bit entry_point
arm64: fix endianness annotation for reloc_insn_movw() & reloc_insn_imm()
arm64: fix endianness annotation for aarch64_insn_write()
arm64: fix endianness annotation in aarch64_insn_read()
arm64: fix endianness annotation in call_undef_hook()
arm64: fix endianness annotation for debug-monitors.c
ras: mark stub functions as 'inline'
arm64: pass endianness info to sparse
arm64: ftrace: fix !CONFIG_ARM64_MODULE_PLTS kernels
arm64: signal: Allow expansion of the signal frame
acpi: apei: check for pending errors when probing GHES entries
...
Diffstat (limited to 'arch/arm64/kernel/ptrace.c')
-rw-r--r-- | arch/arm64/kernel/ptrace.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index c142459a88f3..1b38c0150aec 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -623,6 +623,10 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset, { struct user_fpsimd_state *uregs; uregs = &target->thread.fpsimd_state.user_fpsimd; + + if (target == current) + fpsimd_preserve_current_state(); + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, -1); } @@ -648,6 +652,10 @@ static int tls_get(struct task_struct *target, const struct user_regset *regset, void *kbuf, void __user *ubuf) { unsigned long *tls = &target->thread.tp_value; + + if (target == current) + tls_preserve_current_state(); + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, tls, 0, -1); } @@ -894,21 +902,27 @@ static int compat_vfp_get(struct task_struct *target, { struct user_fpsimd_state *uregs; compat_ulong_t fpscr; - int ret; + int ret, vregs_end_pos; uregs = &target->thread.fpsimd_state.user_fpsimd; + if (target == current) + fpsimd_preserve_current_state(); + /* * The VFP registers are packed into the fpsimd_state, so they all sit * nicely together for us. We just need to create the fpscr separately. */ - ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, - VFP_STATE_SIZE - sizeof(compat_ulong_t)); + vregs_end_pos = VFP_STATE_SIZE - sizeof(compat_ulong_t); + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, + 0, vregs_end_pos); if (count && !ret) { fpscr = (uregs->fpsr & VFP_FPSCR_STAT_MASK) | (uregs->fpcr & VFP_FPSCR_CTRL_MASK); - ret = put_user(fpscr, (compat_ulong_t *)ubuf); + + ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &fpscr, + vregs_end_pos, VFP_STATE_SIZE); } return ret; @@ -921,20 +935,21 @@ static int compat_vfp_set(struct task_struct *target, { struct user_fpsimd_state *uregs; compat_ulong_t fpscr; - int ret; - - if (pos + count > VFP_STATE_SIZE) - return -EIO; + int ret, vregs_end_pos; uregs = &target->thread.fpsimd_state.user_fpsimd; + vregs_end_pos = VFP_STATE_SIZE - sizeof(compat_ulong_t); ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, - VFP_STATE_SIZE - sizeof(compat_ulong_t)); + vregs_end_pos); if (count && !ret) { - ret = get_user(fpscr, (compat_ulong_t *)ubuf); - uregs->fpsr = fpscr & VFP_FPSCR_STAT_MASK; - uregs->fpcr = fpscr & VFP_FPSCR_CTRL_MASK; + ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &fpscr, + vregs_end_pos, VFP_STATE_SIZE); + if (!ret) { + uregs->fpsr = fpscr & VFP_FPSCR_STAT_MASK; + uregs->fpcr = fpscr & VFP_FPSCR_CTRL_MASK; + } } fpsimd_flush_task_state(target); |