diff options
| author | Jan Kara <jack@suse.cz> | 2013-01-30 00:28:01 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-22 23:31:36 -0500 |
| commit | 54c807e71d5ac59dee56c685f2b66e27cd54c475 (patch) | |
| tree | e64f5cc0ae82ab8c7a990485799980ee1678f02f /fs/direct-io.c | |
| parent | da2d8455ed7eb22d7642ecee43dc463ac42a1256 (diff) | |
| download | lwn-54c807e71d5ac59dee56c685f2b66e27cd54c475.tar.gz lwn-54c807e71d5ac59dee56c685f2b66e27cd54c475.zip | |
fs: Fix possible use-after-free with AIO
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.
CC: Christoph Hellwig <hch@infradead.org>
CC: Jens Axboe <axboe@kernel.dk>
CC: Jeff Moyer <jmoyer@redhat.com>
CC: stable@vger.kernel.org
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/direct-io.c')
| -rw-r--r-- | fs/direct-io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index cf5b44b10c67..f853263cf74f 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -261,9 +261,9 @@ static ssize_t dio_complete(struct dio *dio, loff_t offset, ssize_t ret, bool is 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; |