linux-kernel - [PATCH 5/5] libfs : file/directory removal fix, 2.6.18

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20061123082244.GF1703@Krystal>
Date:	Thu, 23 Nov 2006 03:22:44 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Greg KH <greg@...ah.com>
Cc:	ltt-dev@...fik.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5/5] libfs : file/directory removal fix, 2.6.18

Fix file and directory removal in libfs. Add inotify support for file removal.

The following scenario :
create dir a
create dir a/b

cd a/b (some process goes in cwd a/b)

rmdir a/b
rmdir a

fails due to the fact that "a" appears to be non empty. It is because the "b"
dentry is not deleted from "a" and still in use. The same problem happens if
"b" is a file. d_delete is nice enough to know when it needs to unhash and free
the dentry if nothing else is using it or, if someone is using it, to remove it
from the hash queues and wait for it to be deleted when it has no users.

The nice side-effect of this fix is that it calls the file removal
notification.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>

--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -276,6 +276,7 @@ int simple_unlink(struct inode *dir, str

 	inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
 	inode->i_nlink--;
+	d_delete(dentry);
 	dput(dentry);
 	return 0;
 }

OpenPGP public key:              http://krystal.dyndns.org:8080/key/compudj.gpg
Key fingerprint:     8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/