linux-kernel - [PATCH] fs/super.c: Fix lock/unlock imbalance in sget

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-next>] [day] [month] [year] [list]

Message-ID: <20180620131059.GA28925@embeddedor.com>
Date:   Wed, 20 Jun 2018 08:10:59 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     David Howells <dhowells@...hat.com>,
        Alexander Viro <viro@...iv.linux.org.uk>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] fs/super.c: Fix lock/unlock imbalance in sget_fc

It seems a spin_unlock is missing before return at line 532: return old.

Addresses-Coverity-ID: 1470111 ("Missing unlock")
Fixes: 4f3911e76e19 ("vfs: Implement a filesystem superblock creation/configuration context")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 fs/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/super.c b/fs/super.c
index 43400f5..ff24532 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -529,6 +529,7 @@ struct super_block *sget_fc(struct fs_context *fc,
 				destroy_unused_super(s);
 				s = NULL;
 			}
+			spin_unlock(&sb_lock);
 			return old;
 		}
 	}
-- 
2.7.4