| From 355093cd56abe976cffe8581d7dee70cf61c7523 Mon Sep 17 00:00:00 2001 |
| From: Dave Martin <Dave.Martin@arm.com> |
| Date: Mon, 27 Mar 2017 15:10:59 +0100 |
| Subject: [PATCH] sparc/ptrace: Preserve previous registers for short regset |
| write |
| |
| commit d3805c546b275c8cc7d40f759d029ae92c7175f2 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> |
| Acked-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c |
| index 9ddc4928a089..c1566170964f 100644 |
| --- a/arch/sparc/kernel/ptrace_64.c |
| +++ b/arch/sparc/kernel/ptrace_64.c |
| @@ -311,7 +311,7 @@ static int genregs64_set(struct task_struct *target, |
| } |
| |
| if (!ret) { |
| - unsigned long y; |
| + unsigned long y = regs->y; |
| |
| ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, |
| &y, |
| -- |
| 2.12.0 |
| |
