From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Thu, 20 Oct 2016 19:45:13 +0000 (-0400)
Subject: Fix: report an error if unix socket address is too long
X-Git-Tag: v2.7.6~5
X-Git-Url: https://git.liburcu.org/?p=lttng-tools.git;a=commitdiff_plain;h=0a09ade80911354bd1f86daed6f00dc843de6a7a

Fix: report an error if unix socket address is too long

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

diff --git a/src/common/sessiond-comm/unix.c b/src/common/sessiond-comm/unix.c
index 77a6013f0..39ac89d53 100644
--- a/src/common/sessiond-comm/unix.c
+++ b/src/common/sessiond-comm/unix.c
@@ -41,6 +41,14 @@ int lttcomm_connect_unix_sock(const char *pathname)
 	struct sockaddr_un sun;
 	int fd, ret, closeret;
 
+	if (strlen(pathname) >= sizeof(sun.sun_path)) {
+		ERR("unix socket address (\"%s\") is longer than the platform's limit (%zu > %zu).",
+				pathname, strlen(pathname) + 1,
+				sizeof(sun.sun_path));
+		ret = -ENAMETOOLONG;
+		goto error;
+	}
+
 	fd = socket(PF_UNIX, SOCK_STREAM, 0);
 	if (fd < 0) {
 		PERROR("socket");
@@ -111,9 +119,17 @@ LTTNG_HIDDEN
 int lttcomm_create_unix_sock(const char *pathname)
 {
 	struct sockaddr_un sun;
-	int fd;
+	int fd = -1;
 	int ret = -1;
 
+	if (strlen(pathname) >= sizeof(sun.sun_path)) {
+		ERR("unix socket address (\"%s\") is longer than the platform's limit (%zu > %zu).",
+				pathname, strlen(pathname) + 1,
+				sizeof(sun.sun_path));
+		ret = -ENAMETOOLONG;
+		goto error;
+	}
+
 	/* Create server socket */
 	if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 		PERROR("socket");