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| author | Maciej W. Rozycki <macro@mips.com> | 2017-12-11 22:55:40 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-12-12 19:13:42 +0100 |
| commit | 006501e039eec411842bb3150c41358867d320c2 (patch) | |
| tree | 51c985773a4bcd13b9154b05ef318956d1f30aad | |
| parent | be07a6a1188372b6d19a3307ec33211fc9c9439d (diff) | |
| download | op-kernel-dev-006501e039eec411842bb3150c41358867d320c2.zip op-kernel-dev-006501e039eec411842bb3150c41358867d320c2.tar.gz | |
MIPS: Also verify sizeof `elf_fpreg_t' with PTRACE_SETREGSET
Complement commit d614fd58a283 ("mips/ptrace: Preserve previous
registers for short regset write") and like with the PTRACE_GETREGSET
ptrace(2) request also apply a BUILD_BUG_ON check for the size of the
`elf_fpreg_t' type in the PTRACE_SETREGSET request handler.
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Fixes: d614fd58a283 ("mips/ptrace: Preserve previous registers for short regset write")
Cc: James Hogan <james.hogan@mips.com>
Cc: Paul Burton <Paul.Burton@mips.com>
Cc: Alex Smith <alex@alex-smith.me.uk>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # v4.11+
Patchwork: https://patchwork.linux-mips.org/patch/17929/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/kernel/ptrace.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index 0a93959..2569089 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -447,6 +447,7 @@ static int fpr_get_msa(struct task_struct *target, u64 fpr_val; int err; + BUILD_BUG_ON(sizeof(fpr_val) != sizeof(elf_fpreg_t)); for (i = 0; i < NUM_FPU_REGS; i++) { fpr_val = get_fpr64(&target->thread.fpu.fpr[i], 0); err = user_regset_copyout(pos, count, kbuf, ubuf, |
