Warning: Permanently added '10.128.0.244' (ECDSA) to the list of known hosts.
executing program
[   49.842074][ T3595] loop0: detected capacity change from 0 to 253999
[   49.855178][ T3595] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
[   49.863295][ T3595] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
[   49.874030][ T3595] F2FS-fs (loop0): invalid crc_offset: 0
[   49.885247][ T3595] F2FS-fs (loop0): Disable nat_bits due to incorrect cp_ver (8221872453892455638, 0)
[   49.924903][ T3595] F2FS-fs (loop0): Try to recover 2th superblock, ret: 0
[   49.932040][ T3595] F2FS-fs (loop0): Mounted with checkpoint version = 7ad43cd6
[   49.957689][ T3595] 
[   49.960042][ T3595] ============================================
[   49.966168][ T3595] WARNING: possible recursive locking detected
[   49.972301][ T3595] 5.17.0-rc2-next-20220202-syzkaller #0 Not tainted
[   49.978869][ T3595] --------------------------------------------
[   49.984996][ T3595] syz-executor316/3595 is trying to acquire lock:
[   49.991383][ T3595] ffff88801d514390 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_write_checkpoint+0x535/0x5c90
[   50.001859][ T3595] 
[   50.001859][ T3595] but task is already holding lock:
[   50.009206][ T3595] ffff88801d515398 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_issue_checkpoint+0x149/0x480
[   50.019556][ T3595] 
[   50.019556][ T3595] other info that might help us debug this:
[   50.027596][ T3595]  Possible unsafe locking scenario:
[   50.027596][ T3595] 
[   50.035199][ T3595]        CPU0
[   50.038466][ T3595]        ----
[   50.041728][ T3595]   lock(&sem->internal_rwsem#2);
[   50.046744][ T3595]   lock(&sem->internal_rwsem#2);
[   50.051764][ T3595] 
[   50.051764][ T3595]  *** DEADLOCK ***
[   50.051764][ T3595] 
[   50.059976][ T3595]  May be due to missing lock nesting notation
[   50.059976][ T3595] 
[   50.068274][ T3595] 2 locks held by syz-executor316/3595:
[   50.073804][ T3595]  #0: ffff888074db00e0 (&type->s_umount_key#46){+.+.}-{3:3}, at: deactivate_super+0xa5/0xd0
[   50.083995][ T3595]  #1: ffff88801d515398 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_issue_checkpoint+0x149/0x480
[   50.094884][ T3595] 
[   50.094884][ T3595] stack backtrace:
[   50.100755][ T3595] CPU: 0 PID: 3595 Comm: syz-executor316 Not tainted 5.17.0-rc2-next-20220202-syzkaller #0
[   50.110720][ T3595] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   50.120764][ T3595] Call Trace:
[   50.124032][ T3595]  <TASK>
[   50.126952][ T3595]  dump_stack_lvl+0xcd/0x134
[   50.131554][ T3595]  __lock_acquire.cold+0x149/0x3ab
[   50.136672][ T3595]  ? lockdep_hardirqs_on_prepare+0x400/0x400
[   50.142656][ T3595]  lock_acquire+0x1ab/0x510
[   50.147157][ T3595]  ? f2fs_write_checkpoint+0x535/0x5c90
[   50.152696][ T3595]  ? lock_release+0x720/0x720
[   50.157371][ T3595]  ? add_lock_to_list.constprop.0+0x185/0x370
[   50.163440][ T3595]  down_write+0x90/0x150
[   50.167680][ T3595]  ? f2fs_write_checkpoint+0x535/0x5c90
[   50.173216][ T3595]  ? down_write_killable_nested+0x180/0x180
[   50.179106][ T3595]  ? lockdep_hardirqs_on_prepare+0x400/0x400
[   50.185085][ T3595]  ? add_lock_to_list.constprop.0+0x185/0x370
[   50.191154][ T3595]  f2fs_write_checkpoint+0x535/0x5c90
[   50.204598][ T3595]  ? lock_release+0x720/0x720
[   50.215638][ T3595]  ? sync_inodes_sb+0x6c6/0x9e0
[   50.226676][ T3595]  ? f2fs_get_sectors_written+0x410/0x410
[   50.233299][ T3595]  ? down_write+0xde/0x150
[   50.237712][ T3595]  ? down_write_killable_nested+0x180/0x180
[   50.243606][ T3595]  ? wait_for_completion_io+0x270/0x270
[   50.249141][ T3595]  ? sync_inodes_sb+0x69a/0x9e0
[   50.253993][ T3595]  f2fs_issue_checkpoint+0x156/0x480
[   50.259271][ T3595]  ? f2fs_destroy_checkpoint_caches+0x20/0x20
[   50.265330][ T3595]  ? _raw_spin_unlock_irq+0x1f/0x40
[   50.270529][ T3595]  ? sync_inodes_sb+0x6cb/0x9e0
[   50.275375][ T3595]  ? inode_to_bdi+0x98/0x150
[   50.279965][ T3595]  ? try_to_writeback_inodes_sb+0xc0/0xc0
[   50.285685][ T3595]  ? filemap_fdatawrite_range+0xe0/0xe0
[   50.291237][ T3595]  f2fs_sync_fs+0x20f/0x420
[   50.295734][ T3595]  ? f2fs_drop_inode+0xa20/0xa20
[   50.300670][ T3595]  sync_filesystem.part.0+0x13c/0x1d0
[   50.306035][ T3595]  sync_filesystem+0x8b/0xc0
[   50.310617][ T3595]  generic_shutdown_super+0x70/0x400
[   50.315900][ T3595]  kill_block_super+0x97/0xf0
[   50.320572][ T3595]  kill_f2fs_super+0x2b3/0x3c0
[   50.325333][ T3595]  ? f2fs_dquot_commit+0xd0/0xd0
[   50.330270][ T3595]  ? kfree+0x1ed/0x2d0
[   50.334328][ T3595]  ? up_write+0x148/0x470
[   50.338658][ T3595]  ? unregister_shrinker+0x1f5/0x2f0
[   50.343942][ T3595]  deactivate_locked_super+0x94/0x160
[   50.349337][ T3595]  deactivate_super+0xad/0xd0
[   50.354010][ T3595]  cleanup_mnt+0x3a2/0x540
[   50.358422][ T3595]  task_work_run+0xdd/0x1a0
[   50.362924][ T3595]  do_exit+0xb29/0x2b10
[   50.367081][ T3595]  ? lock_downgrade+0x6e0/0x6e0
[   50.371930][ T3595]  ? lock_downgrade+0x6e0/0x6e0
[   50.376865][ T3595]  ? mm_update_next_owner+0x7a0/0x7a0
[   50.382245][ T3595]  do_group_exit+0xd2/0x2f0
[   50.386747][ T3595]  __x64_sys_exit_group+0x3a/0x50
[   50.391771][ T3595]  do_syscall_64+0x35/0xb0
[   50.396179][ T3595]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   50.402075][ T3595] RIP: 0033:0x7f93b7998639
[   50.406478][ T3595] Code: Unable to access opcode bytes at RIP 0x7f93b799860f.
[   50.413825][ T3595] RSP: 002b:00007fffe1dc7708 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   50.422235][ T3595] RAX: ffffffffffffffda RBX: 00007f93b7a0d3