From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Tue, 1 May 2018 15:17:03 +0000 (+0200)
Subject: coverity: #1248104
X-Git-Tag: lxc-3.1.0~313^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0382c0da7b78acc007a1716e6471cc8f1b9ad804;p=thirdparty%2Flxc.git

coverity: #1248104

Argument cannot be negative

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/network.c b/src/lxc/network.c
index e31066cb9..cbffe8ef6 100644
--- a/src/lxc/network.c
+++ b/src/lxc/network.c
@@ -592,6 +592,8 @@ static char *is_wlan(const char *ifname)
 	fseek(f, 0, SEEK_END);
 	physlen = ftell(f);
 	fseek(f, 0, SEEK_SET);
+	if (physlen < 0)
+		goto bad;
 
 	physname = malloc(physlen + 1);
 	if (!physname) {