linux-kernel - audit_tree: keep inode pinned

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Message-ID: <20141022090711.GA6677@tucsk.piliscsaba.szeredi.hu>
Date:	Wed, 22 Oct 2014 11:07:11 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	Eric Paris <eparis@...hat.com>, Al Viro <viro@...iv.linux.org.uk>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: audit_tree: keep inode pinned

From: Miklos Szeredi <mszeredi@...e.cz>

Audit rules disappear when an inode they watch is evicted from the cache.
This is likely not what we want.

The guilty commit is "fsnotify: allow marks to not pin inodes in core",
which didn't take into account that audit_tree adds watches with a zero
mask.

Adding any mask should fix this.

Fixes: 90b1e7a57880 ("fsnotify: allow marks to not pin inodes in core")
Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
Cc: stable@...r.kernel.org # 2.6.36+
---
 kernel/audit_tree.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -154,6 +154,7 @@ static struct audit_chunk *alloc_chunk(i
 		chunk->owners[i].index = i;
 	}
 	fsnotify_init_mark(&chunk->mark, audit_tree_destroy_watch);
+	chunk->mark.mask = FS_IN_IGNORED;
 	return chunk;
 }
 
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