From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Junxiao Bi To: ocfs2-devel@oss.oracle.com, linux-aio@kvack.org Cc: mfasheh@suse.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, joe.jin@oracle.com, Junxiao Bi , stable@vger.kernel.org Subject: [PATCH v4 1/2] aio: make kiocb->private NUll in init_sync_kiocb() Date: Wed, 27 Jun 2012 17:09:54 +0800 Message-Id: <1340788195-20623-2-git-send-email-junxiao.bi@oracle.com> In-Reply-To: <1340788195-20623-1-git-send-email-junxiao.bi@oracle.com> References: <1340788195-20623-1-git-send-email-junxiao.bi@oracle.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: Ocfs2 uses kiocb.*private as a flag of unsigned long size. In commit a11f7e6 ocfs2: serialize unaligned aio, the unaligned io flag is involved in it to serialize the unaligned aio. As *private is not initialized in init_sync_kiocb() of do_sync_write(), this unaligned io flag may be unexpectly set in an aligned dio. And this will cause OCFS2_I(inode)->ip_unaligned_aio decreased to -1 in ocfs2_dio_end_io(), thus the following unaligned dio will hang forever at ocfs2_aiodio_wait() in ocfs2_file_aio_write(). Signed-off-by: Junxiao Bi Cc: stable@vger.kernel.org Acked-by: Jeff Moyer Acked-by: Joel Becker --- include/linux/aio.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/aio.h b/include/linux/aio.h index 2314ad8..b1a520e 100644 --- a/include/linux/aio.h +++ b/include/linux/aio.h @@ -140,6 +140,7 @@ struct kiocb { (x)->ki_dtor = NULL; \ (x)->ki_obj.tsk = tsk; \ (x)->ki_user_data = 0; \ + (x)->private = NULL; \ } while (0) #define AIO_RING_MAGIC 0xa10a10a1 -- 1.7.9.5