3.16.55-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: "Maciej W. Rozycki" <ma...@mips.com>
commit c8c5a3a24d395b14447a9a89d61586a913840a3b upstream.
Complement commit c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use
correct core dump register layout") and also reject outsized
PTRACE_SETREGSET requests to the NT_PRFPREG regset, like with the
NT_PRSTATUS regset.
Signed-off-by: Maciej W. Rozycki <ma...@mips.com>
Fixes: c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump
register layout")
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/17930/
Signed-off-by: Ralf Baechle <r...@linux-mips.org>
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
arch/mips/kernel/ptrace.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -568,6 +568,9 @@ static int fpr_set(struct task_struct *t
BUG_ON(count % sizeof(elf_fpreg_t));
+ if (pos + count > sizeof(elf_fpregset_t))
+ return -EIO;
+
init_fp_ctx(target);
if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t))
