From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 23 Dec 2012 07:46:34 +0000 (-0500)
Subject: hexagon: don't leave ->uc_stack uninitialized
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=da36f98a52e3a299fa067967e2928e9d53d3102f;p=linux-beck.git

hexagon: don't leave ->uc_stack uninitialized

it's used on rt_sigreturn(2)

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

diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index 46ebd4794663..60fa2ca3202b 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -125,6 +125,7 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info,
 	err |= __put_user(0x5400c004, &frame->tramp[1]);
 	err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));
 	if (err)
 		goto sigsegv;