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.
Cc: stable@vger.kernel.org # v3.17+ Fixes: c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") Signed-off-by: Maciej W. Rozycki macro@mips.com ---
Changes from v1:
- regenerated.
--- arch/mips/kernel/ptrace.c | 3 +++ 1 file changed, 3 insertions(+)
linux-mips-nt-prfpreg-size.diff Index: linux-sfr-test/arch/mips/kernel/ptrace.c =================================================================== --- linux-sfr-test.orig/arch/mips/kernel/ptrace.c 2017-12-08 16:22:08.062741000 +0000 +++ linux-sfr-test/arch/mips/kernel/ptrace.c 2017-12-08 16:22:17.727811000 +0000 @@ -541,6 +541,9 @@ 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))