diff --git a/[refs] b/[refs]
index 33c6bc434796..ef6a49faa9ae 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 074a0db8e17ae271736148809c5f9d47dec2d993
+refs/heads/master: 4415d8a5aaec2008833e1c474b38627c0bc738ca
diff --git a/trunk/arch/um/os-Linux/sys-i386/task_size.c b/trunk/arch/um/os-Linux/sys-i386/task_size.c
index 48d211b3d9a1..ccb49b0aff59 100644
--- a/trunk/arch/um/os-Linux/sys-i386/task_size.c
+++ b/trunk/arch/um/os-Linux/sys-i386/task_size.c
@@ -88,7 +88,10 @@ unsigned long os_get_task_size(void)
 	sa.sa_handler = segfault;
 	sigemptyset(&sa.sa_mask);
 	sa.sa_flags = SA_NODEFER;
-	sigaction(SIGSEGV, &sa, &old);
+	if (sigaction(SIGSEGV, &sa, &old)) {
+		perror("os_get_task_size");
+		exit(1);
+	}
 
 	if (!page_ok(bottom)) {
 		fprintf(stderr, "Address 0x%x no good?\n",
@@ -110,11 +113,12 @@ unsigned long os_get_task_size(void)
 
 out:
 	/* Restore the old SIGSEGV handling */
-	sigaction(SIGSEGV, &old, NULL);
-
+	if (sigaction(SIGSEGV, &old, NULL)) {
+		perror("os_get_task_size");
+		exit(1);
+	}
 	top <<= UM_KERN_PAGE_SHIFT;
 	printf("0x%x\n", top);
-	fflush(stdout);
 
 	return top;
 }