This is a note to let you know that I've just added the patch titled
fs: Fix possible use-after-free with AIO
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
fs-fix-possible-use-after-free-with-aio.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 54c807e71d5ac59dee56c685f2b66e27cd54c475 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@xxxxxxx>
Date: Wed, 30 Jan 2013 00:28:01 +0100
Subject: fs: Fix possible use-after-free with AIO
From: Jan Kara <jack@xxxxxxx>
commit 54c807e71d5ac59dee56c685f2b66e27cd54c475 upstream.
Running AIO is pinning inode in memory using file reference. Once AIO
is completed using aio_complete(), file reference is put and inode can
be freed from memory. So we have to be sure that calling aio_complete()
is the last thing we do with the inode.
Acked-by: Jeff Moyer <jmoyer@xxxxxxxxxx>
CC: Christoph Hellwig <hch@xxxxxxxxxxxxx>
CC: Jens Axboe <axboe@xxxxxxxxx>
CC: Jeff Moyer <jmoyer@xxxxxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/direct-io.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -261,9 +261,9 @@ static ssize_t dio_complete(struct dio *
dio->end_io(dio->iocb, offset, transferred,
dio->private, ret, is_async);
} else {
+ inode_dio_done(dio->inode);
if (is_async)
aio_complete(dio->iocb, ret, 0);
- inode_dio_done(dio->inode);
}
return ret;
Patches currently in stable-queue which might be from jack@xxxxxxx are
queue-3.8/ocfs2-fix-possible-use-after-free-with-aio.patch
queue-3.8/quota-autoload-the-quota_v2-module-for-qfmt_vfs_v1-quota-format.patch
queue-3.8/fs-fix-possible-use-after-free-with-aio.patch
queue-3.8/ext4-fix-possible-use-after-free-with-aio.patch
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