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authorMaciej W. Rozycki <macro@mips.com>2017-12-11 22:55:40 +0000
committerRalf Baechle <ralf@linux-mips.org>2017-12-12 19:13:42 +0100
commit006501e039eec411842bb3150c41358867d320c2 (patch)
tree51c985773a4bcd13b9154b05ef318956d1f30aad /arch/mips
parentbe07a6a1188372b6d19a3307ec33211fc9c9439d (diff)
downloadlinux-006501e039eec411842bb3150c41358867d320c2.tar.bz2
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>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/kernel/ptrace.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 0a939593ccb7..256908951a7c 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,