This is a note to let you know that I've just added the patch titled metag/ptrace: Reject partial NT_METAG_RPIPE writes to the 4.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: metag-ptrace-reject-partial-nt_metag_rpipe-writes.patch and it can be found in the queue-4.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 7195ee3120d878259e8d94a5d9f808116f34d5ea Mon Sep 17 00:00:00 2001 From: Dave Martin <Dave.Martin@xxxxxxx> Date: Mon, 27 Mar 2017 15:10:57 +0100 Subject: metag/ptrace: Reject partial NT_METAG_RPIPE writes From: Dave Martin <Dave.Martin@xxxxxxx> commit 7195ee3120d878259e8d94a5d9f808116f34d5ea upstream. It's not clear what behaviour is sensible when doing partial write of NT_METAG_RPIPE, so just don't bother. This patch assumes that userspace will never rely on a partial SETREGSET in this case, since it's not clear what should happen anyway. Signed-off-by: Dave Martin <Dave.Martin@xxxxxxx> Acked-by: James Hogan <james.hogan@xxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/metag/kernel/ptrace.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/metag/kernel/ptrace.c +++ b/arch/metag/kernel/ptrace.c @@ -253,6 +253,8 @@ int metag_rp_state_copyin(struct pt_regs unsigned long long *ptr; int ret, i; + if (count < 4*13) + return -EINVAL; /* Read the entire pipeline before making any changes */ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &rp, 0, 4*13); Patches currently in stable-queue which might be from Dave.Martin@xxxxxxx are queue-4.10/metag-ptrace-reject-partial-nt_metag_rpipe-writes.patch queue-4.10/metag-ptrace-preserve-previous-registers-for-short-regset-write.patch queue-4.10/metag-ptrace-provide-default-txstatus-for-short-nt_prstatus.patch queue-4.10/c6x-ptrace-remove-useless-ptrace_setregset-implementation.patch queue-4.10/mips-ptrace-preserve-previous-registers-for-short-regset-write.patch queue-4.10/h8300-ptrace-fix-incorrect-register-transfer-count.patch queue-4.10/sparc-ptrace-preserve-previous-registers-for-short-regset-write.patch