This is a note to let you know that I've just added the patch titled
metag/ptrace: Preserve previous registers for short regset write
to the 4.4-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-preserve-previous-registers-for-short-regset-write.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a78ce80d2c9178351b34d78fec805140c29c193e Mon Sep 17 00:00:00 2001
From: Dave Martin <Dave.Martin@xxxxxxx>
Date: Mon, 27 Mar 2017 15:10:55 +0100
Subject: metag/ptrace: Preserve previous registers for short regset write
From: Dave Martin <Dave.Martin@xxxxxxx>
commit a78ce80d2c9178351b34d78fec805140c29c193e upstream.
Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET
to fill all the registers, the thread's old registers are preserved.
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, 1 insertion(+), 1 deletion(-)
--- a/arch/metag/kernel/ptrace.c
+++ b/arch/metag/kernel/ptrace.c
@@ -303,7 +303,7 @@ static int metag_tls_set(struct task_str
const void *kbuf, const void __user *ubuf)
{
int ret;
- void __user *tls;
+ void __user *tls = target->thread.tls_ptr;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
if (ret)
Patches currently in stable-queue which might be from Dave.Martin@xxxxxxx are
queue-4.4/metag-ptrace-reject-partial-nt_metag_rpipe-writes.patch
queue-4.4/metag-ptrace-preserve-previous-registers-for-short-regset-write.patch
queue-4.4/metag-ptrace-provide-default-txstatus-for-short-nt_prstatus.patch
queue-4.4/c6x-ptrace-remove-useless-ptrace_setregset-implementation.patch
queue-4.4/mips-ptrace-preserve-previous-registers-for-short-regset-write.patch
queue-4.4/h8300-ptrace-fix-incorrect-register-transfer-count.patch
queue-4.4/sparc-ptrace-preserve-previous-registers-for-short-regset-write.patch