Commit 397d1533 authored Mar 01, 2016 by David S. Miller

sparc64: Fix sparc64_set_context stack handling.



Like a signal return, we should use synchronize_user_stack() rather
than flush_user_windows().

Reported-by: Ilya Malakhov <ilmalakhovthefirst@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 22be3b10

arch/sparc/kernel/signal_64.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -52,7 +52,7 @@ asmlinkage void sparc64_set_context(struct pt_regs *regs)
		unsigned char fenab;
		int err;

		flush_user_windows();
		synchronize_user_stack();
		if (get_thread_wsaved() \|\|
		(((unsigned long)ucp) & (sizeof(unsigned long)-1)) \|\|
		(!__access_ok(ucp, sizeof(*ucp))))