mount: Explicit null dereferenced (FORWARD_NULL)

CID 181217 (#1 of 1): Explicit null dereferenced (FORWARD_NULL) Passing null pointer mntns to mntns_get_root_fd, which dereferences it. Signed-off-by: Adrian Reber <areber@redhat.com>
criupatchwork · Oct 20, 2020 · 16aea4a · 16aea4a
1 parent 5f06740
commit 16aea4a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/criu/mount.c b/criu/mount.c
@@ -3585,6 +3585,10 @@ int mntns_get_root_fd(struct ns_id *mntns)
 {
 	if (!(root_ns_mask & CLONE_NEWNS))
 		return __mntns_get_root_fd(0);
+
+	if (!mntns)
+		return -1;
+
 	/*
 	 * All namespaces are restored from the root task and during the
 	 * CR_STATE_FORKING stage the root task has two file descriptors for