Commit d6c83f56 authored by Dave Martin's avatar Dave Martin Committed by Sasha Levin

tile/ptrace: Preserve previous registers for short regset write

[ Upstream commit fd7c9914 ]

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: default avatarDave Martin <Dave.Martin@arm.com>
Signed-off-by: default avatarChris Metcalf <cmetcalf@mellanox.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent f24c4f60
......@@ -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, &regs, 0,
sizeof(regs));
......
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