[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.974561] INFO: trying to register non-static key. [ 26.979680] the code is fine but needs lockdep annotation. [ 26.985298] turning off the locking correctness validator. [ 26.987716] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 26.990932] CPU: 0 PID: 8002 Comm: syz-executor260 Not tainted 4.14.295-syzkaller #0 [ 26.990935] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 26.990938] Call Trace: [ 26.990952] dump_stack+0x1b2/0x281 [ 26.990962] register_lock_class+0x389/0x1180 [ 26.990970] ? static_obj+0x50/0x50 [ 27.032259] ? add_lock_to_list.constprop.0+0x17d/0x330 [ 27.037596] ? save_trace+0xd6/0x290 [ 27.041282] __lock_acquire+0x167/0x3f20 [ 27.045330] ? mem_cgroup_commit_charge+0x17c/0x3b0 [ 27.050317] ? trace_hardirqs_on+0x10/0x10 [ 27.054522] ? trace_hardirqs_on+0x10/0x10 [ 27.058741] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.064165] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.069155] ? alloc_buffer_head+0x20/0x110 [ 27.073446] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.078870] lock_acquire+0x170/0x3f0 [ 27.082646] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.087725] down_read+0x36/0x80 [ 27.091070] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.096145] nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.101048] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 27.105340] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 27.111037] ? nilfs_mdt_write_page+0x250/0x250 [ 27.115680] nilfs_mdt_read_block+0x7c/0x320 [ 27.120062] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 27.126004] ? finish_task_switch+0x178/0x610 [ 27.130470] ? finish_task_switch+0x14d/0x610 [ 27.134937] nilfs_mdt_get_block+0xc7/0xb90 [ 27.139232] ? nilfs_mdt_read_block+0x320/0x320 [ 27.143888] ? lock_downgrade+0x740/0x740 [ 27.148008] nilfs_palloc_get_block+0xb2/0x250 [ 27.152565] nilfs_palloc_get_entry_block+0x17d/0x230 [ 27.157726] nilfs_ifile_get_inode_block+0xb4/0x150 [ 27.162714] nilfs_iget+0x1c2/0x810 [ 27.166315] ? nilfs_iget_locked+0xb0/0xb0 [ 27.170546] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 27.175454] ? nilfs_detach_log_writer+0x980/0x980 [ 27.180365] ? wait_woken+0x230/0x230 [ 27.184143] nilfs_get_root_dentry+0x24/0x1f0 [ 27.188612] nilfs_mount+0x984/0xd00 [ 27.192391] ? nilfs_attach_checkpoint+0x420/0x420 [ 27.197296] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.202807] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.207805] ? alloc_pages_current+0x15d/0x260 [ 27.212377] ? __lockdep_init_map+0x100/0x560 [ 27.216846] mount_fs+0x92/0x2a0 [ 27.220185] vfs_kern_mount.part.0+0x5b/0x470 [ 27.224748] do_mount+0xe65/0x2a30 [ 27.228263] ? copy_mount_string+0x40/0x40 [ 27.232470] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.237456] ? copy_mnt_ns+0xa30/0xa30 [ 27.241315] ? copy_mount_options+0x1fa/0x2f0 [ 27.245782] ? copy_mnt_ns+0xa30/0xa30 [ 27.249643] SyS_mount+0xa8/0x120 [ 27.253069] ? copy_mnt_ns+0xa30/0xa30 [ 27.256953] do_syscall_64+0x1d5/0x640 [ 27.260818] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.265985] RIP: 0033:0x7fe49fa286ba [ 27.269668] RSP: 002b:00007ffd7dfb0e38 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.277349] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe49fa286ba [ 27.284590] RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007ffd7dfb0e50 [ 27.291830] RBP: 00007ffd7dfb0e50 R08: 00007ffd7dfb0e90 R09: 0000555555e6c2c0 [ 27.299075] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 27.306316] R13: 00007ffd7dfb0e90 R14: 0000000000000039 R15: 0000000020000758 [ 27.315281] kasan: CONFIG_KASAN_INLINE enabled [ 27.320903] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.328300] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.334532] Modules linked in: [ 27.337713] CPU: 0 PID: 8002 Comm: syz-executor260 Not tainted 4.14.295-syzkaller #0 [ 27.345575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.354906] task: ffff8880b2ec6240 task.stack: ffff888095fa0000 [ 27.360945] RIP: 0010:nilfs_bmap_lookup_at_level+0xa5/0x380 [ 27.366624] RSP: 0018:ffff888095fa7750 EFLAGS: 00010246 [ 27.371975] RAX: 0000000000000000 RBX: ffff88808e362098 RCX: 0000000000000000 [ 27.379304] RDX: dffffc0000000000 RSI: 1ffff11012bf4e93 RDI: ffff88808e362158 [ 27.386545] RBP: ffff888095fa7818 R08: 0000000000000001 R09: 0000000000000000 [ 27.393789] R10: 0000000000000001 R11: ffff8880b2ec6240 R12: 0000000000000002 [ 27.401030] R13: 1ffff11012bf4eeb R14: ffff88808e3620d0 R15: 0000000000000001 [ 27.408359] FS: 0000555555e6c300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 27.416558] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.422415] CR2: 00007fe49fa00cf0 CR3: 00000000af8b2000 CR4: 00000000003406f0 [ 27.429659] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.436906] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.444148] Call Trace: [ 27.446713] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 27.451012] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 27.456699] ? nilfs_mdt_write_page+0x250/0x250 [ 27.461344] nilfs_mdt_read_block+0x7c/0x320 [ 27.465748] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 27.471610] ? finish_task_switch+0x178/0x610 [ 27.476084] ? finish_task_switch+0x14d/0x610 [ 27.480556] nilfs_mdt_get_block+0xc7/0xb90 [ 27.484855] ? nilfs_mdt_read_block+0x320/0x320 [ 27.489597] ? lock_downgrade+0x740/0x740 [ 27.493724] nilfs_palloc_get_block+0xb2/0x250 [ 27.498301] nilfs_palloc_get_entry_block+0x17d/0x230 [ 27.503595] nilfs_ifile_get_inode_block+0xb4/0x150 [ 27.508606] nilfs_iget+0x1c2/0x810 [ 27.512212] ? nilfs_iget_locked+0xb0/0xb0 [ 27.516437] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 27.521356] ? nilfs_detach_log_writer+0x980/0x980 [ 27.526268] ? wait_woken+0x230/0x230 [ 27.530048] nilfs_get_root_dentry+0x24/0x1f0 [ 27.534532] nilfs_mount+0x984/0xd00 [ 27.538229] ? nilfs_attach_checkpoint+0x420/0x420 [ 27.543142] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.548574] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.553587] ? alloc_pages_current+0x15d/0x260 [ 27.558147] ? __lockdep_init_map+0x100/0x560 [ 27.563056] mount_fs+0x92/0x2a0 [ 27.566404] vfs_kern_mount.part.0+0x5b/0x470 [ 27.570876] do_mount+0xe65/0x2a30 [ 27.574391] ? copy_mount_string+0x40/0x40 [ 27.578599] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.583677] ? copy_mnt_ns+0xa30/0xa30 [ 27.587626] ? copy_mount_options+0x1fa/0x2f0 [ 27.592124] ? copy_mnt_ns+0xa30/0xa30 [ 27.595990] SyS_mount+0xa8/0x120 [ 27.599422] ? copy_mnt_ns+0xa30/0xa30 [ 27.603288] do_syscall_64+0x1d5/0x640 [ 27.607149] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.612308] RIP: 0033:0x7fe49fa286ba [ 27.616086] RSP: 002b:00007ffd7dfb0e38 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.623854] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fe49fa286ba [ 27.631095] RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007ffd7dfb0e50 [ 27.638338] RBP: 00007ffd7dfb0e50 R08: 00007ffd7dfb0e90 R09: 0000555555e6c2c0 [ 27.645582] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 27.652875] R13: 00007ffd7dfb0e90 R14: 0000000000000039 R15: 0000000020000758 [ 27.660140] 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 [ 27.679205] RIP: nilfs_bmap_lookup_at_level+0xa5/0x380 RSP: ffff888095fa7750 [ 27.686795] ---[ end trace 19a19428c87c6225 ]--- [ 27.692044] Kernel panic - not syncing: Fatal exception [ 27.697464] Kernel Offset: disabled [ 27.701072] Rebooting in 86400 seconds..