From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 17 May 2016 01:42:48 +0000 (-0400)
Subject: Fix: illegal memory access in consumer_set_network_uri
X-Git-Tag: v2.7.3~60
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=43c77a089c0426c0ab3b2988059cc558ab2bd85c;p=lttng-tools.git

Fix: illegal memory access in consumer_set_network_uri

Found by Coverity:
CID 1243029 (#1 of 1): Buffer not null terminated
(BUFFER_SIZE_WARNING)31. buffer_size_warning: Calling strncpy with a
maximum size argument of 4096 bytes on destination array obj->subdir of
size 4096 bytes might leave the destination string unterminated.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 9f154a363..d9961a172 100644
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -714,7 +714,10 @@ int consumer_set_network_uri(struct consumer_output *obj,
 			goto error;
 		}
 
-		strncpy(obj->subdir, tmp_path, sizeof(obj->subdir));
+		if (lttng_strncpy(obj->subdir, tmp_path, sizeof(obj->subdir))) {
+			ret = -LTTNG_ERR_INVALID;
+			goto error;
+		}
 		DBG3("Consumer set network uri subdir path %s", tmp_path);
 	}