| From | Jiri Slaby <> | Subject | [PATCH 3.12 005/113] tile/ptrace: Preserve previous registers for short regset write | Date | Mon, 6 Mar 2017 10:10:29 +0100 |
| |
From: Dave Martin <Dave.Martin@arm.com>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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@arm.com> Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- arch/tile/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index de98c6ddf136..2343126c4ad2 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -110,7 +110,7 @@ static int tile_gpr_set(struct task_struct *target, 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)); -- 2.12.0
|