mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 13:53:33 +00:00
bf23747ee0
The kernel test robot is reporting that xfstest which does
umount ext2 on xfs
umount xfs
sequence started failing, for commit 322c4293ec ("loop: make
autoclear operation asynchronous") removed a guarantee that fput() of
backing file is processed before lo_release() from close() returns to
user mode.
And syzbot is reporting that deferring destroy_workqueue() from
__loop_clr_fd() to a WQ context did not help [1]. Revert that commit.
Link: https://syzkaller.appspot.com/bug?extid=831661966588c802aae9 [1]
Reported-by: kernel test robot <oliver.sang@intel.com>
Acked-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reported-by: syzbot <syzbot+831661966588c802aae9@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/r/20220211071554.3424-1-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Jens Axboe <axboe@kernel.dk>
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/*
|
|
* loop.h
|
|
*
|
|
* Written by Theodore Ts'o, 3/29/93.
|
|
*
|
|
* Copyright 1993 by Theodore Ts'o. Redistribution of this file is
|
|
* permitted under the GNU General Public License.
|
|
*/
|
|
#ifndef _LINUX_LOOP_H
|
|
#define _LINUX_LOOP_H
|
|
|
|
#include <linux/bio.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/blk-mq.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/mutex.h>
|
|
#include <uapi/linux/loop.h>
|
|
|
|
/* Possible states of device */
|
|
enum {
|
|
Lo_unbound,
|
|
Lo_bound,
|
|
Lo_rundown,
|
|
Lo_deleting,
|
|
};
|
|
|
|
struct loop_func_table;
|
|
|
|
struct loop_device {
|
|
int lo_number;
|
|
atomic_t lo_refcnt;
|
|
loff_t lo_offset;
|
|
loff_t lo_sizelimit;
|
|
int lo_flags;
|
|
char lo_file_name[LO_NAME_SIZE];
|
|
|
|
struct file * lo_backing_file;
|
|
struct block_device *lo_device;
|
|
|
|
gfp_t old_gfp_mask;
|
|
|
|
spinlock_t lo_lock;
|
|
int lo_state;
|
|
spinlock_t lo_work_lock;
|
|
struct workqueue_struct *workqueue;
|
|
struct work_struct rootcg_work;
|
|
struct list_head rootcg_cmd_list;
|
|
struct list_head idle_worker_list;
|
|
struct rb_root worker_tree;
|
|
struct timer_list timer;
|
|
bool use_dio;
|
|
bool sysfs_inited;
|
|
|
|
struct request_queue *lo_queue;
|
|
struct blk_mq_tag_set tag_set;
|
|
struct gendisk *lo_disk;
|
|
struct mutex lo_mutex;
|
|
bool idr_visible;
|
|
};
|
|
|
|
struct loop_cmd {
|
|
struct list_head list_entry;
|
|
bool use_aio; /* use AIO interface to handle I/O */
|
|
atomic_t ref; /* only for aio */
|
|
long ret;
|
|
struct kiocb iocb;
|
|
struct bio_vec *bvec;
|
|
struct cgroup_subsys_state *blkcg_css;
|
|
struct cgroup_subsys_state *memcg_css;
|
|
};
|
|
|
|
#endif
|