This is a note to let you know that I've just added the patch titled
tile/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:
tile-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 fd7c99142d77dc4a851879a66715abf12a3193fb Mon Sep 17 00:00:00 2001
From: Dave Martin <Dave.Martin@xxxxxxx>
Date: Fri, 6 Jan 2017 17:54:51 +0000
Subject: tile/ptrace: Preserve previous registers for short regset write
From: Dave Martin <Dave.Martin@xxxxxxx>
commit fd7c99142d77dc4a851879a66715abf12a3193fb 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>
Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/tile/kernel/ptrace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/tile/kernel/ptrace.c
+++ b/arch/tile/kernel/ptrace.c
@@ -111,7 +111,7 @@ static int tile_gpr_set(struct task_stru
const void *kbuf, const void __user *ubuf)
{
int ret;
- struct pt_regs regs;
+ struct pt_regs regs = *task_pt_regs(target);
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®s, 0,
sizeof(regs));
Patches currently in stable-queue which might be from Dave.Martin@xxxxxxx are
queue-4.4/tile-ptrace-preserve-previous-registers-for-short-regset-write.patch
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