Correctly handle unshare call error status

Thanks Keyu Tao for reporting.
DOMjudge · Dec 3, 2023 · 19909c4 · 19909c4
1 parent d66221b
commit 19909c4
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/judge/runguard.c b/judge/runguard.c
@@ -1217,7 +1217,9 @@ int main(int argc, char **argv)
 
 	cgroup_create();
 
-	unshare(CLONE_FILES|CLONE_FS|CLONE_NEWIPC|CLONE_NEWNET|CLONE_NEWNS|CLONE_NEWUTS|CLONE_SYSVSEM);
+	if ( unshare(CLONE_FILES|CLONE_FS|CLONE_NEWIPC|CLONE_NEWNET|CLONE_NEWNS|CLONE_NEWUTS|CLONE_SYSVSEM)!=0 ) {
+		error(errno, "calling unshare");
+	}
 
 	/* Check if any Linux Out-Of-Memory killer adjustments have to
 	 * be made. The oom_adj or oom_score_adj is inherited by child