[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.89' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.669506] INFO: trying to register non-static key. [ 37.674789] the code is fine but needs lockdep annotation. [ 37.680392] turning off the locking correctness validator. [ 37.686009] CPU: 1 PID: 7979 Comm: syz-executor900 Not tainted 4.14.295-syzkaller #0 [ 37.688403] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 37.693875] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 37.693881] Call Trace: [ 37.715556] dump_stack+0x1b2/0x281 [ 37.719163] register_lock_class+0x389/0x1180 [ 37.723632] ? static_obj+0x50/0x50 [ 37.727233] ? add_lock_to_list.constprop.0+0x17d/0x330 [ 37.732576] ? save_trace+0xd6/0x290 [ 37.736263] __lock_acquire+0x167/0x3f20 [ 37.740300] ? cache_alloc_refill+0x2fa/0x350 [ 37.744771] ? trace_hardirqs_on+0x10/0x10 [ 37.748980] ? trace_hardirqs_on+0x10/0x10 [ 37.753189] ? lock_downgrade+0x740/0x740 [ 37.757316] ? alloc_buffer_head+0x20/0x110 [ 37.761611] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 37.767040] lock_acquire+0x170/0x3f0 [ 37.770816] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 37.775895] down_read+0x36/0x80 [ 37.779237] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 37.784324] nilfs_bmap_lookup_at_level+0x6b/0x380 [ 37.789230] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 37.793526] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 37.799211] ? nilfs_mdt_write_page+0x250/0x250 [ 37.803857] nilfs_mdt_read_block+0x7c/0x320 [ 37.808423] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 37.814292] ? __lock_acquire+0x2190/0x3f20 [ 37.818592] nilfs_mdt_get_block+0xc7/0xb90 [ 37.822891] ? nilfs_mdt_read_block+0x320/0x320 [ 37.827537] ? lock_downgrade+0x740/0x740 [ 37.831663] nilfs_palloc_get_block+0xb2/0x250 [ 37.836333] nilfs_palloc_get_entry_block+0x17d/0x230 [ 37.841503] ? nilfs_iget+0x18e/0x810 [ 37.845287] nilfs_ifile_get_inode_block+0xb4/0x150 [ 37.850281] nilfs_iget+0x1c2/0x810 [ 37.853891] ? nilfs_iget_locked+0xb0/0xb0 [ 37.858105] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 37.863008] ? nilfs_detach_log_writer+0x980/0x980 [ 37.867940] ? wait_woken+0x230/0x230 [ 37.871715] nilfs_get_root_dentry+0x24/0x1f0 [ 37.876182] nilfs_mount+0x984/0xd00 [ 37.879870] ? nilfs_attach_checkpoint+0x420/0x420 [ 37.884774] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 37.890203] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 37.895201] ? alloc_pages_current+0x15d/0x260 [ 37.899829] ? __lockdep_init_map+0x100/0x560 [ 37.904300] mount_fs+0x92/0x2a0 [ 37.907645] vfs_kern_mount.part.0+0x5b/0x470 [ 37.912113] do_mount+0xe65/0x2a30 [ 37.915630] ? retint_kernel+0x2d/0x2d [ 37.919493] ? copy_mount_string+0x40/0x40 [ 37.923703] ? memset+0x20/0x40 [ 37.926956] ? copy_mount_options+0x1fa/0x2f0 [ 37.931424] ? copy_mnt_ns+0xa30/0xa30 [ 37.935285] SyS_mount+0xa8/0x120 [ 37.938714] ? copy_mnt_ns+0xa30/0xa30 [ 37.942574] do_syscall_64+0x1d5/0x640 [ 37.946433] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.951593] RIP: 0033:0x7fe8f4dfd73a [ 37.955276] RSP: 002b:00007fff866cc538 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 37.962955] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe8f4dfd73a [ 37.970196] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff866cc550 [ 37.977439] RBP: 00007fff866cc550 R08: 00007fff866cc590 R09: 000055555720f2c0 [ 37.984683] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 37.991932] R13: 00007fff866cc590 R14: 000000000000003b R15: 0000000020000788 [ 37.999642] kasan: CONFIG_KASAN_INLINE enabled [ 38.004213] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 38.011739] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.017957] Modules linked in: [ 38.021139] CPU: 1 PID: 7979 Comm: syz-executor900 Not tainted 4.14.295-syzkaller #0 [ 38.028996] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 38.038329] task: ffff8880b34844c0 task.stack: ffff88808d2a0000 [ 38.044366] RIP: 0010:nilfs_bmap_lookup_at_level+0xa5/0x380 [ 38.050057] RSP: 0018:ffff88808d2a7750 EFLAGS: 00010246 [ 38.055402] RAX: 0000000000000000 RBX: ffff88808d6f4098 RCX: 0000000000000000 [ 38.062653] RDX: dffffc0000000000 RSI: 1ffff11011a54e93 RDI: ffff88808d6f4158 [ 38.069922] RBP: ffff88808d2a7818 R08: 0000000000000001 R09: 0000000000000000 [ 38.077164] R10: 0000000000000001 R11: ffff8880b34844c0 R12: 0000000000000002 [ 38.084406] R13: 1ffff11011a54eeb R14: ffff88808d6f40d0 R15: 0000000000000001 [ 38.091659] FS: 000055555720f300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 38.099857] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.105710] CR2: 00007fff866cd000 CR3: 00000000b4c3b000 CR4: 00000000003406e0 [ 38.112963] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.120218] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.127560] Call Trace: [ 38.130130] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 38.134427] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 38.140113] ? nilfs_mdt_write_page+0x250/0x250 [ 38.144756] nilfs_mdt_read_block+0x7c/0x320 [ 38.149154] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 38.155014] ? __lock_acquire+0x2190/0x3f20 [ 38.159321] nilfs_mdt_get_block+0xc7/0xb90 [ 38.163618] ? nilfs_mdt_read_block+0x320/0x320 [ 38.168259] ? lock_downgrade+0x740/0x740 [ 38.172385] nilfs_palloc_get_block+0xb2/0x250 [ 38.176939] nilfs_palloc_get_entry_block+0x17d/0x230 [ 38.182104] ? nilfs_iget+0x18e/0x810 [ 38.185876] nilfs_ifile_get_inode_block+0xb4/0x150 [ 38.190863] nilfs_iget+0x1c2/0x810 [ 38.194462] ? nilfs_iget_locked+0xb0/0xb0 [ 38.198673] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 38.203577] ? nilfs_detach_log_writer+0x980/0x980 [ 38.208479] ? wait_woken+0x230/0x230 [ 38.212253] nilfs_get_root_dentry+0x24/0x1f0 [ 38.216719] nilfs_mount+0x984/0xd00 [ 38.220408] ? nilfs_attach_checkpoint+0x420/0x420 [ 38.225311] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 38.230779] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 38.235806] ? alloc_pages_current+0x15d/0x260 [ 38.240450] ? __lockdep_init_map+0x100/0x560 [ 38.244923] mount_fs+0x92/0x2a0 [ 38.248272] vfs_kern_mount.part.0+0x5b/0x470 [ 38.252924] do_mount+0xe65/0x2a30 [ 38.256448] ? retint_kernel+0x2d/0x2d [ 38.260312] ? copy_mount_string+0x40/0x40 [ 38.264543] ? memset+0x20/0x40 [ 38.267804] ? copy_mount_options+0x1fa/0x2f0 [ 38.272284] ? copy_mnt_ns+0xa30/0xa30 [ 38.276155] SyS_mount+0xa8/0x120 [ 38.279585] ? copy_mnt_ns+0xa30/0xa30 [ 38.283446] do_syscall_64+0x1d5/0x640 [ 38.287314] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 38.292477] RIP: 0033:0x7fe8f4dfd73a [ 38.296224] RSP: 002b:00007fff866cc538 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 38.303910] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe8f4dfd73a [ 38.311157] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff866cc550 [ 38.318403] RBP: 00007fff866cc550 R08: 00007fff866cc590 R09: 000055555720f2c0 [ 38.325827] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 38.333068] R13: 00007fff866cc590 R14: 000000000000003b R15: 0000000020000788 [ 38.340315] Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 69 02 00 00 48 8b 83 c0 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 <80> 3c 11 00 0f 85 32 02 00 00 4c 89 e6 48 89 e9 44 89 fa 48 89 [ 38.359387] RIP: nilfs_bmap_lookup_at_level+0xa5/0x380 RSP: ffff88808d2a7750 [ 38.366865] ---[ end trace 74cc34552fc5290f ]--- [ 38.371730] Kernel panic - not syncing: Fatal exception [ 38.377249] Kernel Offset: disabled [ 38.380855] Rebooting in 86400 seconds..