netdev - [PATCH 5/6] lib/namespace: don't leak fd in error case

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu,  6 Aug 2015 14:24:35 +0200
From:	Phil Sutter <phil@....cc>
To:	Stephen Hemminger <shemming@...cade.com>
Cc:	netdev@...r.kernel.org
Subject: [PATCH 5/6] lib/namespace: don't leak fd in error case

Signed-off-by: Phil Sutter <phil@....cc>
---
 lib/namespace.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/namespace.c b/lib/namespace.c
index a61feb6..8197165 100644
--- a/lib/namespace.c
+++ b/lib/namespace.c
@@ -58,32 +58,35 @@ int netns_switch(char *name)
 	if (setns(netns, CLONE_NEWNET) < 0) {
 		fprintf(stderr, "setting the network namespace \"%s\" failed: %s\n",
 			name, strerror(errno));
-		return -1;
+		goto fail_close;
 	}
 
 	if (unshare(CLONE_NEWNS) < 0) {
 		fprintf(stderr, "unshare failed: %s\n", strerror(errno));
-		return -1;
+		goto fail_close;
 	}
 	/* Don't let any mounts propagate back to the parent */
 	if (mount("", "/", "none", MS_SLAVE | MS_REC, NULL)) {
 		fprintf(stderr, "\"mount --make-rslave /\" failed: %s\n",
 			strerror(errno));
-		return -1;
+		goto fail_close;
 	}
 	/* Mount a version of /sys that describes the network namespace */
 	if (umount2("/sys", MNT_DETACH) < 0) {
 		fprintf(stderr, "umount of /sys failed: %s\n", strerror(errno));
-		return -1;
+		goto fail_close;
 	}
 	if (mount(name, "/sys", "sysfs", 0, NULL) < 0) {
 		fprintf(stderr, "mount of /sys failed: %s\n",strerror(errno));
-		return -1;
+		goto fail_close;
 	}
 
 	/* Setup bind mounts for config files in /etc */
 	bind_etc(name);
 	return 0;
+fail_close:
+	close(netns);
+	return -1;
 }
 
 int netns_get_fd(const char *name)
-- 
2.1.2

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html