cris: don't leave ->uc_stack unitialized - we'll use its contents on sigreturn

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c
index 187237f655e6..9570946a6958 100644
--- a/arch/cris/arch-v10/kernel/signal.c
+++ b/arch/cris/arch-v10/kernel/signal.c
@@ -356,6 +356,8 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 
+        err |= __save_altstack(&frame->uc.uc_stack, rdusp());
+
         if (err)
                 goto give_sigsegv;