linux-kernel - [PATCH 28/40] score: Don't mask signals if we fail to setup signal stack

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Date:	Tue, 14 Feb 2012 11:41:01 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	linux-arch@...r.kernel.org
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Matt Fleming <matt.fleming@...el.com>,
	Chen Liqin <liqin.chen@...plusct.com>,
	Lennox Wu <lennox.wu@...il.com>
Subject: [PATCH 28/40] score: Don't mask signals if we fail to setup signal stack

From: Matt Fleming <matt.fleming@...el.com>

If setup_rt_frame() returns -EFAULT then we must not block any signals
in the current process.

Acked-by: Oleg Nesterov <oleg@...hat.com>
Cc: Chen Liqin <liqin.chen@...plusct.com>
Cc: Lennox Wu <lennox.wu@...il.com>
Signed-off-by: Matt Fleming <matt.fleming@...el.com>
---
 arch/score/kernel/signal.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index aa57440..bf9e33e 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -272,12 +272,14 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
 	 */
 	ret = setup_rt_frame(ka, regs, sig, oldset, info);
 
-	spin_lock_irq(&current->sighand->siglock);
-	sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
-	if (!(ka->sa.sa_flags & SA_NODEFER))
-		sigaddset(&current->blocked, sig);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	if (ret == 0) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
+		if (!(ka->sa.sa_flags & SA_NODEFER))
+			sigaddset(&current->blocked, sig);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
 
 	return ret;
 }
-- 
1.7.4.4

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