fix possible fd leak, unrestored cancellation state on dns socket fail

[musl] / src / network / res_msend.c

diff --git a/src/network/res_msend.c b/src/network/res_msend.c
index de7f615..3e01800 100644 (file)
--- a/src/network/res_msend.c
+++ b/src/network/res_msend.c
@@ -76,7 +76,11 @@ int __res_msend_rc(int nqueries, const unsigned char *const *queries,
                fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
                family = AF_INET;
        }
-       if (fd < 0 || bind(fd, (void *)&sa, sl) < 0) return -1;
+       if (fd < 0 || bind(fd, (void *)&sa, sl) < 0) {
+               if (fd >= 0) close(fd);
+               pthread_setcancelstate(cs, 0);
+               return -1;
+       }
 
        /* Past this point, there are no errors. Each individual query will
         * yield either no reply (indicated by zero length) or an answer