From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Wed, 21 Dec 2011 02:35:52 +0000 (-0500)
Subject: check for negative wait() return value
X-Git-Tag: v1.9.3~3
X-Git-Url: http://git.liburcu.org/?a=commitdiff_plain;h=b7d3cb3244fc618a690efbdfa04137683396cf0d;p=lttng-ust.git

check for negative wait() return value

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/liblttng-ust/lttng-ust-comm.c b/liblttng-ust/lttng-ust-comm.c
index 5c4e4e76..c52531f5 100644
--- a/liblttng-ust/lttng-ust-comm.c
+++ b/liblttng-ust/lttng-ust-comm.c
@@ -413,7 +413,7 @@ int get_wait_shm(struct sock_info *sock_info, size_t mmap_size)
 		 * shared memory map will have been created.
 		 */
 		pid = wait(&status);
-		if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
+		if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
 			wait_shm_fd = -1;
 			goto end;
 		}