[ 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... 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 '10.128.0.213' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.209711] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [ 33.228154] INFO: trying to register non-static key. [ 33.230630] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 33.233257] The code is fine but needs lockdep annotation, or maybe [ 33.249400] you didn't initialize this object before use? [ 33.254910] turning off the locking correctness validator. [ 33.260514] CPU: 1 PID: 8115 Comm: syz-executor405 Not tainted 4.19.211-syzkaller #0 [ 33.268368] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 33.277697] Call Trace: [ 33.280268] dump_stack+0x1fc/0x2ef [ 33.283873] register_lock_class+0xe82/0x11c0 [ 33.288347] ? static_obj+0x50/0x50 [ 33.291950] __lock_acquire+0x17d/0x3ff0 [ 33.295989] ? __lock_acquire+0x6de/0x3ff0 [ 33.300199] ? cache_alloc_refill+0x2f8/0x340 [ 33.304667] ? mark_held_locks+0xf0/0xf0 [ 33.308705] ? mark_held_locks+0xf0/0xf0 [ 33.312741] ? lock_downgrade+0x720/0x720 [ 33.316950] ? do_raw_spin_lock+0xcb/0x220 [ 33.321163] ? check_preemption_disabled+0x41/0x280 [ 33.326156] ? alloc_buffer_head+0x20/0x130 [ 33.330456] lock_acquire+0x170/0x3c0 [ 33.334234] ? nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.339313] down_read+0x36/0x80 [ 33.342655] ? nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.347735] nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.352642] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 33.356941] nilfs_mdt_submit_block.constprop.0+0x1a5/0xaa0 [ 33.362627] ? save_trace+0xd6/0x290 [ 33.366317] ? nilfs_mdt_write_page+0x280/0x280 [ 33.370963] nilfs_mdt_read_block+0x96/0x3e0 [ 33.375361] ? nilfs_mdt_submit_block.constprop.0+0xaa0/0xaa0 [ 33.381220] ? mark_held_locks+0xf0/0xf0 [ 33.385346] nilfs_mdt_get_block+0xe6/0xd40 [ 33.389647] ? nilfs_mdt_read_block+0x3e0/0x3e0 [ 33.394290] ? lock_downgrade+0x720/0x720 [ 33.398422] ? lock_acquire+0x170/0x3c0 [ 33.402377] ? nilfs_palloc_get_block+0x3a/0x2b0 [ 33.407111] nilfs_palloc_get_block+0xc4/0x2b0 [ 33.411755] nilfs_palloc_get_entry_block+0x17b/0x230 [ 33.416920] ? nilfs_iget+0x1cf/0x860 [ 33.420698] nilfs_ifile_get_inode_block+0xbf/0x170 [ 33.425690] nilfs_iget+0x204/0x860 [ 33.429296] ? nilfs_iget_locked+0xd0/0xd0 [ 33.433518] ? nilfs_attach_log_writer+0x68b/0xa30 [ 33.438422] ? wait_woken+0x250/0x250 [ 33.442197] ? nilfs_mount+0x9df/0xe70 [ 33.446079] nilfs_get_root_dentry+0x26/0x250 [ 33.450557] nilfs_mount+0xac8/0xe70 [ 33.454256] ? nilfs_attach_checkpoint+0x4b0/0x4b0 [ 33.459175] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.464175] ? pcpu_alloc+0xc9/0x1190 [ 33.467957] ? alloc_pages_current+0x19b/0x2a0 [ 33.472514] mount_fs+0xa3/0x310 [ 33.475860] vfs_kern_mount.part.0+0x68/0x470 [ 33.480337] do_mount+0x115c/0x2f50 [ 33.483945] ? do_raw_spin_unlock+0x171/0x230 [ 33.488430] ? check_preemption_disabled+0x41/0x280 [ 33.493437] ? copy_mount_string+0x40/0x40 [ 33.497659] ? copy_mount_options+0x59/0x380 [ 33.502052] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.507134] ? kmem_cache_alloc_trace+0x323/0x380 [ 33.511954] ? copy_mount_options+0x26f/0x380 [ 33.516428] ksys_mount+0xcf/0x130 [ 33.519945] __x64_sys_mount+0xba/0x150 [ 33.523895] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.528451] do_syscall_64+0xf9/0x620 [ 33.532232] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.537401] RIP: 0033:0x7fc4ea7e368a [ 33.541092] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 33.559970] RSP: 002b:00007ffd1f0bb598 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 33.567656] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc4ea7e368a [ 33.574904] RDX: 0000000020000000 RSI: 0000000020000080 RDI: 00007ffd1f0bb5b0 [ 33.582155] RBP: 00007ffd1f0bb5b0 R08: 00007ffd1f0bb5f0 R09: 00005555562592c0 [ 33.589404] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 33.596653] R13: 00007ffd1f0bb5f0 R14: 000000000000003b R15: 0000000020000788 [ 33.604136] kasan: CONFIG_KASAN_INLINE enabled [ 33.608711] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.616122] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.622356] CPU: 1 PID: 8115 Comm: syz-executor405 Not tainted 4.19.211-syzkaller #0 [ 33.630329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 33.639688] RIP: 0010:nilfs_bmap_lookup_at_level+0xb5/0x3e0 [ 33.645378] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 95 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 7d 02 00 00 4c 89 e6 48 89 e9 44 89 fa 48 89 df [ 33.664255] RSP: 0018:ffff8880b242f650 EFLAGS: 00010246 [ 33.669593] RAX: 0000000000000000 RBX: ffff88808dfbd098 RCX: 0000000000000000 [ 33.676855] RDX: dffffc0000000000 RSI: ffffffff814a9aa2 RDI: ffff88808dfbd158 [ 33.684115] RBP: ffff8880b242f738 R08: 0000000000000001 R09: 0000000000000000 [ 33.691360] R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000002 [ 33.698605] R13: 1ffff11016485ecb R14: ffff88808dfbd0d0 R15: 0000000000000001 [ 33.705853] FS: 0000555556259300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.714052] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.719910] CR2: 000056175824d160 CR3: 0000000099a9e000 CR4: 00000000003406e0 [ 33.727158] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.734406] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.741649] Call Trace: [ 33.744219] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 33.748522] nilfs_mdt_submit_block.constprop.0+0x1a5/0xaa0 [ 33.754212] ? save_trace+0xd6/0x290 [ 33.757904] ? nilfs_mdt_write_page+0x280/0x280 [ 33.762551] nilfs_mdt_read_block+0x96/0x3e0 [ 33.766938] ? nilfs_mdt_submit_block.constprop.0+0xaa0/0xaa0 [ 33.772799] ? mark_held_locks+0xf0/0xf0 [ 33.776839] nilfs_mdt_get_block+0xe6/0xd40 [ 33.781146] ? nilfs_mdt_read_block+0x3e0/0x3e0 [ 33.785877] ? lock_downgrade+0x720/0x720 [ 33.790000] ? lock_acquire+0x170/0x3c0 [ 33.793948] ? nilfs_palloc_get_block+0x3a/0x2b0 [ 33.798681] nilfs_palloc_get_block+0xc4/0x2b0 [ 33.803242] nilfs_palloc_get_entry_block+0x17b/0x230 [ 33.808408] ? nilfs_iget+0x1cf/0x860 [ 33.812186] nilfs_ifile_get_inode_block+0xbf/0x170 [ 33.818394] nilfs_iget+0x204/0x860 [ 33.821997] ? nilfs_iget_locked+0xd0/0xd0 [ 33.826210] ? nilfs_attach_log_writer+0x68b/0xa30 [ 33.831115] ? wait_woken+0x250/0x250 [ 33.834891] ? nilfs_mount+0x9df/0xe70 [ 33.838756] nilfs_get_root_dentry+0x26/0x250 [ 33.843230] nilfs_mount+0xac8/0xe70 [ 33.846931] ? nilfs_attach_checkpoint+0x4b0/0x4b0 [ 33.851837] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.856831] ? pcpu_alloc+0xc9/0x1190 [ 33.860613] ? alloc_pages_current+0x19b/0x2a0 [ 33.865170] mount_fs+0xa3/0x310 [ 33.868514] vfs_kern_mount.part.0+0x68/0x470 [ 33.872984] do_mount+0x115c/0x2f50 [ 33.876590] ? do_raw_spin_unlock+0x171/0x230 [ 33.881062] ? check_preemption_disabled+0x41/0x280 [ 33.886053] ? copy_mount_string+0x40/0x40 [ 33.890263] ? copy_mount_options+0x59/0x380 [ 33.894648] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.899641] ? kmem_cache_alloc_trace+0x323/0x380 [ 33.904463] ? copy_mount_options+0x26f/0x380 [ 33.908937] ksys_mount+0xcf/0x130 [ 33.912454] __x64_sys_mount+0xba/0x150 [ 33.916406] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.920964] do_syscall_64+0xf9/0x620 [ 33.924743] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.929908] RIP: 0033:0x7fc4ea7e368a [ 33.933609] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 33.952487] RSP: 002b:00007ffd1f0bb598 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 33.960169] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc4ea7e368a [ 33.967416] RDX: 0000000020000000 RSI: 0000000020000080 RDI: 00007ffd1f0bb5b0 [ 33.974662] RBP: 00007ffd1f0bb5b0 R08: 00007ffd1f0bb5f0 R09: 00005555562592c0 [ 33.981907] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 33.989151] R13: 00007ffd1f0bb5f0 R14: 000000000000003b R15: 0000000020000788 [ 33.996410] Modules linked in: [ 33.999710] ---[ end trace 85bfc3abf49ef86c ]--- [ 34.004526] RIP: 0010:nilfs_bmap_lookup_at_level+0xb5/0x3e0 [ 34.011052] Code: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 95 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 7d 02 00 00 4c 89 e6 48 89 e9 44 89 fa 48 89 df [ 34.030009] RSP: 0018:ffff8880b242f650 EFLAGS: 00010246 [ 34.035420] RAX: 0000000000000000 RBX: ffff88808dfbd098 RCX: 0000000000000000 [ 34.042709] RDX: dffffc0000000000 RSI: ffffffff814a9aa2 RDI: ffff88808dfbd158 [ 34.049969] RBP: ffff8880b242f738 R08: 0000000000000001 R09: 0000000000000000 [ 34.057280] R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000002 [ 34.064595] R13: 1ffff11016485ecb R14: ffff88808dfbd0d0 R15: 0000000000000001 [ 34.071890] FS: 0000555556259300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 34.080165] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.086030] CR2: 000056175824d160 CR3: 0000000099a9e000 CR4: 00000000003406e0 [ 34.093325] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.100632] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.107887] Kernel panic - not syncing: Fatal exception [ 34.113405] Kernel Offset: disabled [ 34.117011] Rebooting in 86400 seconds..