From: Ayala Beker <ayala.beker@intel.com>
Date: Thu, 10 Dec 2015 10:56:03 +0000 (+0200)
Subject: utils: Fix NULL pointer dereference with unexpected kernel behavior
X-Git-Tag: hostap_2_6~1179
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=819ad5b70b0cb2d3ed64c11aa4cbf11c9a3fc698;p=thirdparty%2Fhostap.git

utils: Fix NULL pointer dereference with unexpected kernel behavior

Fix mostly theoretical NULL pointer dereference in
wpa_debug_open_linux_tracing() if /proc/mounts were to return a
malformed line.

Signed-off-by: Ayala Beker <ayala.beker@intel.com>
---

diff --git a/src/utils/wpa_debug.c b/src/utils/wpa_debug.c
index 3275524f6..f7acf6b9f 100644
--- a/src/utils/wpa_debug.c
+++ b/src/utils/wpa_debug.c
@@ -148,7 +148,7 @@ int wpa_debug_open_linux_tracing(void)
 		strtok_r(line, " ", &tmp2);
 		tmp_path = strtok_r(NULL, " ", &tmp2);
 		fstype = strtok_r(NULL, " ", &tmp2);
-		if (strcmp(fstype, "debugfs") == 0) {
+		if (fstype && strcmp(fstype, "debugfs") == 0) {
 			path = tmp_path;
 			break;
 		}