3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Maciej W. Rozycki <[email protected]> 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 <[email protected]> Fixes: c23b3d1a5311 ("MIPS: ptrace: Change GP regset to use correct core dump register layout") Cc: James Hogan <[email protected]> Cc: Paul Burton <[email protected]> Cc: Alex Smith <[email protected]> Cc: Dave Martin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/17930/ Signed-off-by: Ralf Baechle <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/mips/kernel/ptrace.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -530,6 +530,9 @@ static int fpr_set(struct task_struct *t BUG_ON(count % sizeof(elf_fpreg_t)); + if (pos + count > sizeof(elf_fpregset_t)) + return -EIO; + if (sizeof(target->thread.fpu.fpr[0]) == sizeof(elf_fpreg_t)) err = fpr_set_fpa(target, &pos, &count, &kbuf, &ubuf); else
