Commit 84b94c43 authored Mar 27, 2017 by Dave Martin Committed by Greg Kroah-Hartman Mar 31, 2017

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 0ba34c87

arch/sparc/kernel/ptrace_64.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -313,7 +313,7 @@ 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,