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| author | Jan Kara <jack@suse.cz> | 2013-01-29 22:48:17 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-01-29 22:48:17 -0500 |
| commit | 091e26dfc156aeb3b73bc5c5f277e433ad39331c (patch) | |
| tree | 03a95cea66597c0b7289ea6fbdc13785a5e21919 /fs/ext4/inode.c | |
| parent | b1deefc99e668348f7c785c6ece5f6ff4c6d8b5c (diff) | |
| download | linux-091e26dfc156aeb3b73bc5c5f277e433ad39331c.tar.bz2 | |
ext4: 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: stable@vger.kernel.org
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 86bf43d6dfcd..07d9defeaf8c 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2850,9 +2850,9 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset, if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) { ext4_free_io_end(io_end); out: + inode_dio_done(inode); if (is_async) aio_complete(iocb, ret, 0); - inode_dio_done(inode); return; } |