4.4-stable 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: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/mips/kernel/ptrace.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -570,6 +570,9 @@ 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))