diff mbox series

[2/8] vchan-socket-proxy: Check xs_watch return value

Message ID 20200525024955.225415-3-jandryuk@gmail.com (mailing list archive)
State Superseded
Headers show
Series Coverity fixes for vchan-socket-proxy | expand

Commit Message

Jason Andryuk May 25, 2020, 2:49 a.m. UTC 
Check the return value of xs_watch and error out on failure.

This was found by Citrix's Coverity.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
---
 tools/libvchan/vchan-socket-proxy.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/libvchan/vchan-socket-proxy.c b/tools/libvchan/vchan-socket-proxy.c
index 6d860af340..bd12632311 100644
--- a/tools/libvchan/vchan-socket-proxy.c
+++ b/tools/libvchan/vchan-socket-proxy.c
@@ -225,8 +225,15 @@  static struct libxenvchan *connect_vchan(int domid, const char *path) {
         goto out;
     }
     /* wait for vchan server to create *path* */
-    xs_watch(xs, path, "path");
-    xs_watch(xs, "@releaseDomain", "release");
+    if (!xs_watch(xs, path, "path")) {
+        fprintf(stderr, "xs_watch(%s) failed.\n", path);
+        goto out;
+    }
+    if (!xs_watch(xs, "@releaseDomain", "release")) {
+        fprintf(stderr, "xs_watch(@releaseDomain failed.\n");
+        goto out;
+    }
+
     while ((watch_ret = xs_read_watch(xs, &watch_num))) {
         /* don't care about exact which fired the watch */
         free(watch_ret);