commit 089e449a82cd5ba8a858dfea88e754afb9341037
author Al Viro <viro@zeniv.linux.org.uk> Mon Oct 11 23:35:08 2010 -0400
committer Geert Uytterhoeven <geert@linux-m68k.org> Fri Jan 07 14:06:59 2011 +0100
tree c95c95611e7e75c9dafd4cb6a8dfe633b1047fab
parent d1574df7e01d427c2ed80ada11433a72907ca472

m68knommu: Don't lose state if sigframe setup fails

exact parallel to m68k analog

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68knommu/kernel/signal.c

diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c
index c070f3f..e00f1bb 100644
--- a/arch/m68knommu/kernel/signal.c
+++ b/arch/m68knommu/kernel/signal.c
@@ -528,7 +528,7 @@
 	return (void *)((usp - frame_size) & -8UL);
 }
 
-static void setup_frame (int sig, struct k_sigaction *ka,
+static int setup_frame (int sig, struct k_sigaction *ka,
 			 sigset_t *set, struct pt_regs *regs)
 {
 	struct sigframe *frame;
@@ -582,14 +582,14 @@
 		tregs->pc = regs->pc;
 		tregs->sr = regs->sr;
 	}
-	return;
+	return err;
 
 give_sigsegv:
 	force_sigsegv(sig, current);
 	goto adjust_stack;
 }
 
-static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
 			    sigset_t *set, struct pt_regs *regs)
 {
 	struct rt_sigframe *frame;
@@ -646,7 +646,7 @@
 		tregs->pc = regs->pc;
 		tregs->sr = regs->sr;
 	}
-	return;
+	return err;
 
 give_sigsegv:
 	force_sigsegv(sig, current);
@@ -693,6 +693,7 @@
 handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
 	      sigset_t *oldset, struct pt_regs *regs)
 {
+	int err;
 	/* are we from a system call? */
 	if (regs->orig_d0 >= 0)
 		/* If so, check system call restarting.. */
@@ -700,9 +701,12 @@
 
 	/* set up the stack frame */
 	if (ka->sa.sa_flags & SA_SIGINFO)
-		setup_rt_frame(sig, ka, info, oldset, regs);
+		err = setup_rt_frame(sig, ka, info, oldset, regs);
 	else
-		setup_frame(sig, ka, oldset, regs);
+		err = setup_frame(sig, ka, oldset, regs);
+
+	if (err)
+		return;
 
 	spin_lock_irq(&current->sighand->siglock);
 	sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
@@ -710,6 +714,8 @@
 		sigaddset(&current->blocked,sig);
 	recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
+
+	clear_thread_flag(TIF_RESTORE_SIGMASK);
 }
 
 /*
@@ -742,7 +748,6 @@
 	if (signr > 0) {
 		/* Whee!  Actually deliver the signal.  */
 		handle_signal(signr, &ka, &info, oldset, regs);
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
 		return;
 	}