[Qemu-devel] [PATCH 2/2] virtfs-proxy-helper: fail gracefully if socket path is too long

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

From: Stefan Hajnoczi <stefanha@redhat.com>

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>
---
 fsdev/virtfs-proxy-helper.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fsdev/virtfs-proxy-helper.c b/fsdev/virtfs-proxy-helper.c
index 91e8b9b7f1cf..9097d15c989c 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");
-- 
2.1.4