From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Tue, 18 Feb 2020 00:35:52 +0000 (-0500)
Subject: Fix: relayd: unchecked poll set creation return value
X-Git-Tag: v2.13.0-rc1~763
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=64e2c0ed5db412b9b3ecced98c7875bf3da0c08f

Fix: relayd: unchecked poll set creation return value

The fd_tracker_util_poll_create function can fail because of fd
exhaustion or because the underlying epoll call fails.

In both cases, report and handle the error.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Id1e35d43442e74dd6784a9a4e235576a5bf135e2
---

diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c
index 3aef0fabc..cbd9e9cc7 100644
--- a/src/bin/lttng-relayd/main.c
+++ b/src/bin/lttng-relayd/main.c
@@ -918,6 +918,10 @@ static int create_named_thread_poll_set(struct lttng_poll_event *events,
 
 	ret = fd_tracker_util_poll_create(the_fd_tracker,
 		        name, events, 1, LTTNG_CLOEXEC);
+	if (ret) {
+		PERROR("Failed to create \"%s\" poll file descriptor", name);
+		goto error;
+	}
 
 	/* Add quit pipe */
 	ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR);