Commit fd7c9914 authored Jan 06, 2017 by Dave Martin Committed by Chris Metcalf Jan 06, 2017

tile/ptrace: Preserve previous registers for short regset write



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 <Dave.Martin@arm.com>
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>

parent 0c744ea4

arch/tile/kernel/ptrace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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));