[ 49.838741][ T942] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.852724][ T942] device veth1_macvtap left promiscuous mode [ 49.859472][ T942] device veth0_macvtap left promiscuous mode [ 49.865838][ T942] device veth1_vlan left promiscuous mode [ 49.871735][ T942] device veth0_vlan left promiscuous mode [ 49.996268][ T942] team0 (unregistering): Port device team_slave_1 removed [ 50.009909][ T942] team0 (unregistering): Port device team_slave_0 removed [ 50.023831][ T942] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 50.038351][ T942] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 50.082542][ T942] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.1.123' (ECDSA) to the list of known hosts. [ 66.489193][ T4062] loop0: detected capacity change from 0 to 131072 [ 66.503928][ T4062] F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) [ 66.513103][ T4062] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock [ 66.525944][ T4062] F2FS-fs (loop0): invalid crc_offset: 0 [ 66.537751][ T4062] F2FS-fs (loop0): Disable nat_bits due to incorrect cp_ver (13274671252798256465, 0) [ 66.574191][ T4062] F2FS-fs (loop0): Try to recover 2th superblock, ret: 0 [ 66.581548][ T4062] F2FS-fs (loop0): Mounted with checkpoint version = 15213551 [ 66.605000][ T4062] [ 66.607557][ T4062] ============================================ [ 66.613798][ T4062] WARNING: possible recursive locking detected [ 66.620484][ T4062] 5.17.0-rc1-syzkaller #0 Not tainted [ 66.626378][ T4062] -------------------------------------------- [ 66.632526][ T4062] syz-executor288/4062 is trying to acquire lock: [ 66.639017][ T4062] ffff888017bc4390 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_write_checkpoint+0x466/0x5ae0 [ 66.649522][ T4062] [ 66.649522][ T4062] but task is already holding lock: [ 66.656953][ T4062] ffff888017bc5338 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_issue_checkpoint+0x2a0/0x430 [ 66.667441][ T4062] [ 66.667441][ T4062] other info that might help us debug this: [ 66.675822][ T4062] Possible unsafe locking scenario: [ 66.675822][ T4062] [ 66.683343][ T4062] CPU0 [ 66.686631][ T4062] ---- [ 66.690010][ T4062] lock(&sem->internal_rwsem#2); [ 66.695113][ T4062] lock(&sem->internal_rwsem#2); [ 66.701120][ T4062] [ 66.701120][ T4062] *** DEADLOCK *** [ 66.701120][ T4062] [ 66.709343][ T4062] May be due to missing lock nesting notation [ 66.709343][ T4062] [ 66.717662][ T4062] 2 locks held by syz-executor288/4062: [ 66.723252][ T4062] #0: ffff888076f680e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0x5f/0x80 [ 66.733688][ T4062] #1: ffff888017bc5338 (&sem->internal_rwsem#2){++++}-{3:3}, at: f2fs_issue_checkpoint+0x2a0/0x430 [ 66.744476][ T4062] [ 66.744476][ T4062] stack backtrace: [ 66.750361][ T4062] CPU: 0 PID: 4062 Comm: syz-executor288 Not tainted 5.17.0-rc1-syzkaller #0 [ 66.759445][ T4062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.769584][ T4062] Call Trace: [ 66.772862][ T4062] [ 66.775780][ T4062] dump_stack_lvl+0x57/0x7d [ 66.780293][ T4062] __lock_acquire.cold+0x12c/0x3a9 [ 66.785382][ T4062] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 66.791340][ T4062] ? stack_trace_save+0x8c/0xc0 [ 66.796190][ T4062] ? filter_irq_stacks+0x90/0x90 [ 66.801124][ T4062] lock_acquire+0x1ab/0x510 [ 66.805611][ T4062] ? f2fs_write_checkpoint+0x466/0x5ae0 [ 66.811198][ T4062] ? lock_release+0x720/0x720 [ 66.816018][ T4062] down_write+0x90/0x150 [ 66.820347][ T4062] ? f2fs_write_checkpoint+0x466/0x5ae0 [ 66.825989][ T4062] ? down_write_killable_nested+0x180/0x180 [ 66.832111][ T4062] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 66.838568][ T4062] ? __lock_acquire+0x2485/0x5410 [ 66.843643][ T4062] f2fs_write_checkpoint+0x466/0x5ae0 [ 66.849025][ T4062] ? lock_acquire+0x1ab/0x510 [ 66.853756][ T4062] ? lock_release+0x720/0x720 [ 66.858426][ T4062] ? lock_downgrade+0x6e0/0x6e0 [ 66.863350][ T4062] ? lock_chain_count+0x20/0x20 [ 66.868210][ T4062] ? f2fs_get_sectors_written+0x3f0/0x3f0 [ 66.873918][ T4062] ? down_write+0xde/0x150 [ 66.878487][ T4062] ? down_write_killable_nested+0x180/0x180 [ 66.884465][ T4062] ? sync_inodes_sb+0x59d/0x880 [ 66.889328][ T4062] ? lock_downgrade+0x6e0/0x6e0 [ 66.894407][ T4062] f2fs_issue_checkpoint+0x2ad/0x430 [ 66.899691][ T4062] ? f2fs_destroy_checkpoint_caches+0x20/0x20 [ 66.905909][ T4062] ? sync_inodes_sb+0x5bf/0x880 [ 66.910768][ T4062] ? inode_to_bdi+0x99/0x120 [ 66.915356][ T4062] ? try_to_writeback_inodes_sb+0xa0/0xa0 [ 66.921679][ T4062] ? filemap_fdatawrite_wbc+0x33/0x170 [ 66.927169][ T4062] ? filemap_fdatawrite+0xc0/0xc0 [ 66.932553][ T4062] sync_filesystem+0x15c/0x1f0 [ 66.937449][ T4062] generic_shutdown_super+0x64/0x3a0 [ 66.942742][ T4062] kill_block_super+0x90/0xd0 [ 66.947651][ T4062] kill_f2fs_super+0x241/0x340 [ 66.952491][ T4062] ? trace_event_raw_event_f2fs_issue_reset_zone+0x220/0x220 [ 66.959838][ T4062] ? kfree+0x1bc/0x280 [ 66.963986][ T4062] ? up_write+0x148/0x470 [ 66.968329][ T4062] ? unregister_shrinker+0x1b2/0x2b0 [ 66.973716][ T4062] deactivate_locked_super+0x7b/0x130 [ 66.979273][ T4062] cleanup_mnt+0x324/0x4d0 [ 66.983696][ T4062] ? lockdep_hardirqs_on_prepare+0x17b/0x400 [ 66.989681][ T4062] ? _raw_spin_unlock_irq+0x1f/0x40 [ 66.994904][ T4062] task_work_run+0xc0/0x160 [ 66.999425][ T4062] do_exit+0x9a6/0x2500 [ 67.003578][ T4062] ? lock_downgrade+0x6e0/0x6e0 [ 67.008512][ T4062] ? mm_update_next_owner+0x6d0/0x6d0 [ 67.013973][ T4062] do_group_exit+0xb2/0x2a0 [ 67.018469][ T4062] __x64_sys_exit_group+0x35/0x40 [ 67.023729][ T4062] do_syscall_64+0x35/0xb0 [ 67.028360][ T4062] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 67.034323][ T4062] RIP: 0033:0x7fbcb9731929 [ 67.039588][ T4062] Code: Unable to access opcode bytes at RIP 0x7fbcb97318ff. [ 67.047059][ T4062] RSP: 002b:00007fff0bd71888 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 67.055776][