virtfs-proxy-helper: fail gracefully if socket path is too long

Replace the assertion check with graceful failure when the socket path
is too long.  Programs should not crash on invalid input.  Print an
error message and exit properly.

Cc: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
index 91e8b9b..9097d15 100644
--- a/fsdev/virtfs-proxy-helper.c
+++ b/fsdev/virtfs-proxy-helper.c
@@ -739,7 +739,12 @@ static int proxy_socket(const char *path, uid_t uid, gid_t gid)
         return -1;
     }
 
-    g_assert(strlen(path) < sizeof(proxy.sun_path));
+    if (strlen(path) >= sizeof(proxy.sun_path)) {
+        do_log(LOG_CRIT, "UNIX domain socket path exceeds %zu characters\n",
+               sizeof(proxy.sun_path));
+        return -1;
+    }
+
     sock = socket(AF_UNIX, SOCK_STREAM, 0);
     if (sock < 0) {
         do_perror("socket");