4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Maciej W. Rozycki <ma...@mips.com>
commit 006501e039eec411842bb3150c41358867d320c2 upstream.
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 <ma...@mips.com>
Fixes: d614fd58a283 ("mips/ptrace: Preserve previous registers for short regset
write")
Cc: James Hogan <james.ho...@mips.com>
Cc: Paul Burton <paul.bur...@mips.com>
Cc: Alex Smith <a...@alex-smith.me.uk>
Cc: Dave Martin <dave.mar...@arm.com>
Cc: linux-m...@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17929/
Signed-off-by: Ralf Baechle <r...@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/mips/kernel/ptrace.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -438,6 +438,7 @@ static int fpr_get_msa(struct task_struc
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,
