linux-kernel - [PATCH 3.16.y-ckt 192/254] audit: keep inode pinned

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Message-Id: <1416912004-5928-193-git-send-email-luis.henriques@canonical.com>
Date:	Tue, 25 Nov 2014 10:39:02 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Miklos Szeredi <mszeredi@...e.cz>, Paul Moore <pmoore@...hat.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 192/254] audit: keep inode pinned

3.16.7-ckt2 -stable review patch.  If anyone has any objections, please let me know.

------------------

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

commit 799b601451b21ebe7af0e6e8f6e2ccd4683c5064 upstream.

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>
Signed-off-by: Paul Moore <pmoore@...hat.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 kernel/audit_tree.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 135944a7b28a..a79db03990db 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -154,6 +154,7 @@ static struct audit_chunk *alloc_chunk(int count)
 		chunk->owners[i].index = i;
 	}
 	fsnotify_init_mark(&chunk->mark, audit_tree_destroy_watch);
+	chunk->mark.mask = FS_IN_IGNORED;
 	return chunk;
 }
 
-- 
2.1.0

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