possible deadlock in flush_workqueue (2)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    91b15613ce7f Merge git://git.kernel.org/pub/scm/linux/kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10114109400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b3f55cb3dfcc6c33
dashboard link: https://syzkaller.appspot.com/bug?extid=a50c7541a4a55cd49b02
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=159c1de9400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+a50c7541a4a55cd49b02@xxxxxxxxxxxxxxxxxxxxxxxxx

8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0

======================================================
WARNING: possible circular locking dependency detected
4.19.0-rc8+ #291 Not tainted
------------------------------------------------------
syz-executor1/6832 is trying to acquire lock:
000000007d4a82f2 ((wq_completion)"dio/%s"sb->s_id){+.+.}, at:  
flush_workqueue+0x2db/0x1e10 kernel/workqueue.c:2652

but task is already holding lock:
00000000e2da6d71 (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_trylock  
include/linux/fs.h:758 [inline]
00000000e2da6d71 (&sb->s_type->i_mutex_key#10){+.+.}, at:  
ext4_file_write_iter+0x2a1/0x1420 fs/ext4/file.c:232

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env

-> #2 (&sb->s_type->i_mutex_key#10){+.+.}:
       down_write+0x8a/0x130 kernel/locking/rwsem.c:70
       inode_lock include/linux/fs.h:738 [inline]
       __generic_file_fsync+0xb5/0x200 fs/libfs.c:981
       ext4_sync_file+0xa4f/0x1510 fs/ext4/fsync.c:120
       vfs_fsync_range+0x140/0x220 fs/sync.c:197
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
       generic_write_sync include/linux/fs.h:2732 [inline]
       dio_complete+0x75c/0x9e0 fs/direct-io.c:329
       dio_aio_complete_work+0x20/0x30 fs/direct-io.c:341
       process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
       worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
       kthread+0x35a/0x420 kernel/kthread.c:246
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

-> #1 ((work_completion)(&dio->complete_work)){+.+.}:
       process_one_work+0xc0a/0x1b90 kernel/workqueue.c:2129
       worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
       kthread+0x35a/0x420 kernel/kthread.c:246
       ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

-> #0 ((wq_completion)"dio/%s"sb->s_id){+.+.}:
       lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
       flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655
       drain_workqueue+0x2a9/0x640 kernel/workqueue.c:2820
       destroy_workqueue+0xc6/0x9c0 kernel/workqueue.c:4155
       sb_init_dio_done_wq+0x74/0x90 fs/direct-io.c:634
       do_blockdev_direct_IO+0x12ea/0x9d70 fs/direct-io.c:1283
       __blockdev_direct_IO+0x9d/0xc6 fs/direct-io.c:1417
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
       ext4_direct_IO_write fs/ext4/inode.c:3743 [inline]
       ext4_direct_IO+0xae8/0x2230 fs/ext4/inode.c:3870
       generic_file_direct_write+0x275/0x4b0 mm/filemap.c:3042
       __generic_file_write_iter+0x2ff/0x630 mm/filemap.c:3221
       ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266
       call_write_iter include/linux/fs.h:1808 [inline]
       aio_write+0x3b1/0x610 fs/aio.c:1561
       io_submit_one+0xaa1/0xf80 fs/aio.c:1835
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
       __do_sys_io_submit fs/aio.c:1916 [inline]
       __se_sys_io_submit fs/aio.c:1887 [inline]
       __x64_sys_io_submit+0x1b7/0x580 fs/aio.c:1887
       do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

Chain exists of:
  (wq_completion)"dio/%s"sb->s_id -->  
(work_completion)(&dio->complete_work) --> &sb->s_type->i_mutex_key#10

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sb->s_type->i_mutex_key#10);
                               lock((work_completion)(&dio->complete_work));
                               lock(&sb->s_type->i_mutex_key#10);
  lock((wq_completion)"dio/%s"sb->s_id);

 *** DEADLOCK ***

1 lock held by syz-executor1/6832:
 #0: 00000000e2da6d71 (&sb->s_type->i_mutex_key#10){+.+.}, at:  
inode_trylock include/linux/fs.h:758 [inline]
 #0: 00000000e2da6d71 (&sb->s_type->i_mutex_key#10){+.+.}, at:  
ext4_file_write_iter+0x2a1/0x1420 fs/ext4/file.c:232

stack backtrace:
CPU: 1 PID: 6832 Comm: syz-executor1 Not tainted 4.19.0-rc8+ #291
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
 print_circular_bug.isra.33.cold.54+0x1bd/0x27d  
kernel/locking/lockdep.c:1221
 check_prev_add kernel/locking/lockdep.c:1861 [inline]
 check_prevs_add kernel/locking/lockdep.c:1974 [inline]
 validate_chain kernel/locking/lockdep.c:2415 [inline]
 __lock_acquire+0x33e4/0x4ec0 kernel/locking/lockdep.c:3411
 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
 flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655
 drain_workqueue+0x2a9/0x640 kernel/workqueue.c:2820
 destroy_workqueue+0xc6/0x9c0 kernel/workqueue.c:4155
 sb_init_dio_done_wq+0x74/0x90 fs/direct-io.c:634
 do_blockdev_direct_IO+0x12ea/0x9d70 fs/direct-io.c:1283
 __blockdev_direct_IO+0x9d/0xc6 fs/direct-io.c:1417
 ext4_direct_IO_write fs/ext4/inode.c:3743 [inline]
 ext4_direct_IO+0xae8/0x2230 fs/ext4/inode.c:3870
 generic_file_direct_write+0x275/0x4b0 mm/filemap.c:3042
 __generic_file_write_iter+0x2ff/0x630 mm/filemap.c:3221
 ext4_file_write_iter+0x390/0x1420 fs/ext4/file.c:266
 call_write_iter include/linux/fs.h:1808 [inline]
 aio_write+0x3b1/0x610 fs/aio.c:1561
 io_submit_one+0xaa1/0xf80 fs/aio.c:1835
 __do_sys_io_submit fs/aio.c:1916 [inline]
 __se_sys_io_submit fs/aio.c:1887 [inline]
 __x64_sys_io_submit+0x1b7/0x580 fs/aio.c:1887
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7  
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff  
ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f7d19a51c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000020000540 RSI: 0000000000000008 RDI: 00007f7d19a31000
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7d19a526d4
R13: 00000000004be72d R14: 00000000004ce380 R15: 00000000ffffffff
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
syz-executor3 (6993) used greatest stack depth: 14648 bytes left
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
Page cache invalidation failure on direct I/O.  Possible data corruption  
due to collision with buffered I/O!
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
File: /root/syzkaller-testdir701396558/syzkaller.CThVT5/11/bus PID: 14  
Comm: kworker/0:1
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
Page cache invalidation failure on direct I/O.  Possible data corruption  
due to collision with buffered I/O!
File: /root/syzkaller-testdir446226321/syzkaller.6kf3D2/23/bus PID: 14  
Comm: kworker/0:1
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
syz-executor5 (7484) used greatest stack depth: 12280 bytes left
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
Page cache invalidation failure on direct I/O.  Possible data corruption  
due to collision with buffered I/O!
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
File: /root/syzkaller-testdir749472085/syzkaller.cOi3p9/41/bus PID: 5692  
Comm: kworker/0:4
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
Page cache invalidation failure on direct I/O.  Possible data corruption  
due to collision with buffered I/O!
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
File: /root/syzkaller-testdir625100220/syzkaller.kNEfa4/64/bus PID: 7011  
Comm: kworker/0:5
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env
kobject: 'loop5' (00000000373a5938): fill_kobj_path: path  
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000d7ab4dab): kobject_uevent_env
kobject: 'loop4' (00000000d7ab4dab): fill_kobj_path: path  
= '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop1' (0000000020356063): kobject_uevent_env
kobject: 'loop1' (0000000020356063): fill_kobj_path: path  
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000a99f8b0a): kobject_uevent_env
kobject: 'loop2' (00000000a99f8b0a): fill_kobj_path: path  
= '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000088c9da71): kobject_uevent_env
kobject: 'loop0' (0000000088c9da71): fill_kobj_path: path  
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000037f642c): kobject_uevent_env
kobject: 'loop3' (00000000037f642c): fill_kobj_path: path  
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000373a5938): kobject_uevent_env


---
This bug is generated by a bot. It may contain errors.
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