From d6c83f5607bfcc1420e869cde808caf5b6013964 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Fri, 6 Jan 2017 17:54:51 +0000 Subject: tile/ptrace: Preserve previous registers for short regset write [ Upstream commit fd7c99142d77dc4a851879a66715abf12a3193fb ] Ensure that if userspace supplies insufficient data to PTRACE_SETREGSET to fill all the registers, the thread's old registers are preserved. Cc: stable@vger.kernel.org Signed-off-by: Dave Martin Signed-off-by: Chris Metcalf Signed-off-by: Sasha Levin --- arch/tile/kernel/ptrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c index f84eed8243da..1231bff72582 100644 --- a/arch/tile/kernel/ptrace.c +++ b/arch/tile/kernel/ptrace.c @@ -111,7 +111,7 @@ 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)); -- cgit v1.2.3