[ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.498928] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 27.509275] INFO: trying to register non-static key. [ 27.514380] the code is fine but needs lockdep annotation. [ 27.520128] turning off the locking correctness validator. [ 27.525776] CPU: 1 PID: 7999 Comm: syz-executor319 Not tainted 4.14.295-syzkaller #0 [ 27.533645] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.542983] Call Trace: [ 27.545554] dump_stack+0x1b2/0x281 [ 27.549271] register_lock_class+0x389/0x1180 [ 27.553748] ? static_obj+0x50/0x50 [ 27.557349] ? add_lock_to_list.constprop.0+0x17d/0x330 [ 27.562702] ? save_trace+0xd6/0x290 [ 27.566391] __lock_acquire+0x167/0x3f20 [ 27.570462] ? cache_alloc_refill+0x2fa/0x350 [ 27.574933] ? trace_hardirqs_on+0x10/0x10 [ 27.579243] ? trace_hardirqs_on+0x10/0x10 [ 27.583449] ? lock_downgrade+0x740/0x740 [ 27.587570] ? alloc_buffer_head+0x20/0x110 [ 27.591870] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.597299] lock_acquire+0x170/0x3f0 [ 27.601085] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.606176] down_read+0x36/0x80 [ 27.609525] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.614604] nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.619528] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 27.623841] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 27.629625] ? nilfs_mdt_write_page+0x250/0x250 [ 27.634272] nilfs_mdt_read_block+0x7c/0x320 [ 27.638660] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 27.644532] ? __lock_acquire+0x2190/0x3f20 [ 27.648831] nilfs_mdt_get_block+0xc7/0xb90 [ 27.653129] ? nilfs_mdt_read_block+0x320/0x320 [ 27.657772] ? lock_downgrade+0x740/0x740 [ 27.661896] nilfs_palloc_get_block+0xb2/0x250 [ 27.666453] nilfs_palloc_get_entry_block+0x17d/0x230 [ 27.671613] ? nilfs_iget+0x18e/0x810 [ 27.675384] nilfs_ifile_get_inode_block+0xb4/0x150 [ 27.680461] nilfs_iget+0x1c2/0x810 [ 27.684060] ? nilfs_iget_locked+0xb0/0xb0 [ 27.688309] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 27.693252] ? nilfs_detach_log_writer+0x980/0x980 [ 27.698156] ? wait_woken+0x230/0x230 [ 27.701931] nilfs_get_root_dentry+0x24/0x1f0 [ 27.706410] nilfs_mount+0x984/0xd00 [ 27.710110] ? nilfs_attach_checkpoint+0x420/0x420 [ 27.715019] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.720444] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.725441] ? alloc_pages_current+0x15d/0x260 [ 27.729999] ? __lockdep_init_map+0x100/0x560 [ 27.734469] mount_fs+0x92/0x2a0 [ 27.737815] vfs_kern_mount.part.0+0x5b/0x470 [ 27.742284] do_mount+0xe65/0x2a30 [ 27.745838] ? retint_kernel+0x2d/0x2d [ 27.749698] ? copy_mount_string+0x40/0x40 [ 27.753904] ? memset+0x20/0x40 [ 27.757157] ? copy_mount_options+0x1fa/0x2f0 [ 27.761631] ? copy_mnt_ns+0xa30/0xa30 [ 27.765493] SyS_mount+0xa8/0x120 [ 27.768924] ? copy_mnt_ns+0xa30/0xa30 [ 27.772805] do_syscall_64+0x1d5/0x640 [ 27.776668] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.781830] RIP: 0033:0x7f504268261a [ 27.785702] RSP: 002b:00007ffda09b1fb8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.793381] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f504268261a [ 27.800634] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffda09b1fd0 [ 27.807884] RBP: 00007ffda09b1fd0 R08: 00007ffda09b2010 R09: 00005555566952c0 [ 27.815476] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 27.822722] R13: 00007ffda09b2010 R14: 000000000000003b R15: 0000000020000788 [ 27.830375] kasan: CONFIG_KASAN_INLINE enabled [ 27.835270] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.842677] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.848894] Modules linked in: [ 27.852081] CPU: 1 PID: 7999 Comm: syz-executor319 Not tainted 4.14.295-syzkaller #0 [ 27.859932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.869275] task: ffff88809c72a3c0 task.stack: ffff888095eb8000 [ 27.875315] RIP: 0010:nilfs_bmap_lookup_at_level+0xa5/0x380 [ 27.881000] RSP: 0018:ffff888095ebf750 EFLAGS: 00010246 [ 27.886442] RAX: 0000000000000000 RBX: ffff88808db21098 RCX: 0000000000000000 [ 27.893690] RDX: dffffc0000000000 RSI: 1ffff11012bd7e93 RDI: ffff88808db21158 [ 27.900939] RBP: ffff888095ebf818 R08: 0000000000000001 R09: 0000000000000000 [ 27.908187] R10: 0000000000000001 R11: ffff88809c72a3c0 R12: 0000000000000002 [ 27.915436] R13: 1ffff11012bd7eeb R14: ffff88808db210d0 R15: 0000000000000001 [ 27.922859] FS: 0000555556695300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 27.931234] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.937088] CR2: 000055b5e9789988 CR3: 00000000a528a000 CR4: 00000000003406e0 [ 27.945724] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.952968] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.960217] Call Trace: [ 27.962877] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 27.967175] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 27.972857] ? nilfs_mdt_write_page+0x250/0x250 [ 27.977498] nilfs_mdt_read_block+0x7c/0x320 [ 27.981885] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 27.987743] ? __lock_acquire+0x2190/0x3f20 [ 27.992037] nilfs_mdt_get_block+0xc7/0xb90 [ 27.996332] ? nilfs_mdt_read_block+0x320/0x320 [ 28.000982] ? lock_downgrade+0x740/0x740 [ 28.005111] nilfs_palloc_get_block+0xb2/0x250 [ 28.009678] nilfs_palloc_get_entry_block+0x17d/0x230 [ 28.014934] ? nilfs_iget+0x18e/0x810 [ 28.018715] nilfs_ifile_get_inode_block+0xb4/0x150 [ 28.023969] nilfs_iget+0x1c2/0x810 [ 28.027568] ? nilfs_iget_locked+0xb0/0xb0 [ 28.031777] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 28.036680] ? nilfs_detach_log_writer+0x980/0x980 [ 28.041587] ? wait_woken+0x230/0x230 [ 28.045400] nilfs_get_root_dentry+0x24/0x1f0 [ 28.049887] nilfs_mount+0x984/0xd00 [ 28.053577] ? nilfs_attach_checkpoint+0x420/0x420 [ 28.058485] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.064349] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.069351] ? alloc_pages_current+0x15d/0x260 [ 28.073909] ? __lockdep_init_map+0x100/0x560 [ 28.078386] mount_fs+0x92/0x2a0 [ 28.081730] vfs_kern_mount.part.0+0x5b/0x470 [ 28.086200] do_mount+0xe65/0x2a30 [ 28.089724] ? retint_kernel+0x2d/0x2d [ 28.093585] ? copy_mount_string+0x40/0x40 [ 28.097793] ? memset+0x20/0x40 [ 28.101050] ? copy_mount_options+0x1fa/0x2f0 [ 28.105518] ? copy_mnt_ns+0xa30/0xa30 [ 28.109377] SyS_mount+0xa8/0x120 [ 28.112804] ? copy_mnt_ns+0xa30/0xa30 [ 28.116672] do_syscall_64+0x1d5/0x640 [ 28.120533] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.125869] RIP: 0033:0x7f504268261a [ 28.129551] RSP: 002b:00007ffda09b1fb8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 28.137232] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f504268261a [ 28.146123] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffda09b1fd0 [ 28.153367] RBP: 00007ffda09b1fd0 R08: 00007ffda09b2010 R09: 00005555566952c0 [ 28.160611] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 28.167853] R13: 00007ffda09b2010 R14: 000000000000003b R15: 0000000020000788 [ 28.175096] 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 [ 28.194163] RIP: nilfs_bmap_lookup_at_level+0xa5/0x380 RSP: ffff888095ebf750 [ 28.201545] ---[ end trace e3e4834ea33345c6 ]--- [ 28.206288] Kernel panic - not syncing: Fatal exception [ 28.211853] Kernel Offset: disabled [ 28.215459] Rebooting in 86400 seconds..