sparc64: Fix sparc64_set_context stack handling.
authorDavid S. Miller <davem@davemloft.net>
Tue, 1 Mar 2016 05:25:32 +0000 (00:25 -0500)
committerDavid S. Miller <davem@davemloft.net>
Tue, 1 Mar 2016 05:25:32 +0000 (00:25 -0500)
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>
arch/sparc/kernel/signal_64.c

index d88beff47bab3eb74fece39e282f7c701ab84868..39aaec173f66ebce88fe7953c99b412f5b07cc3d 100644 (file)
@@ -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))))