Starting System Logging Service... [ OK ] Started Permit User Sessions. [ OK ] Started Getty on tty1. [ OK ] Found device /dev/ttyS0. [ OK ] Started System Logging Service. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.161' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.130381] INFO: trying to register non-static key. [ 33.135512] The code is fine but needs lockdep annotation, or maybe [ 33.140450] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 33.141907] you didn't initialize this object before use? [ 33.157196] turning off the locking correctness validator. [ 33.162805] CPU: 1 PID: 8146 Comm: syz-executor139 Not tainted 4.19.211-syzkaller #0 [ 33.170663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 33.180048] Call Trace: [ 33.182618] dump_stack+0x1fc/0x2ef [ 33.186226] register_lock_class+0xe82/0x11c0 [ 33.190698] ? static_obj+0x50/0x50 [ 33.194303] __lock_acquire+0x17d/0x3ff0 [ 33.198341] ? __lock_acquire+0x6de/0x3ff0 [ 33.202553] ? mark_held_locks+0xf0/0xf0 [ 33.206590] ? mark_held_locks+0xf0/0xf0 [ 33.210625] ? lock_downgrade+0x720/0x720 [ 33.214748] ? lock_acquire+0x170/0x3c0 [ 33.218704] ? get_mem_cgroup_from_page+0x7a/0x3b0 [ 33.223626] ? check_preemption_disabled+0x41/0x280 [ 33.228626] ? check_preemption_disabled+0x41/0x280 [ 33.233622] ? alloc_buffer_head+0x20/0x130 [ 33.237921] lock_acquire+0x170/0x3c0 [ 33.241702] ? nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.246789] down_read+0x36/0x80 [ 33.250135] ? nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.255212] nilfs_bmap_lookup_at_level+0x7b/0x3e0 [ 33.260115] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 33.264419] nilfs_mdt_submit_block.constprop.0+0x1a5/0xaa0 [ 33.270106] ? save_trace+0xd6/0x290 [ 33.273886] ? nilfs_mdt_write_page+0x280/0x280 [ 33.278539] nilfs_mdt_read_block+0x96/0x3e0 [ 33.282923] ? nilfs_mdt_submit_block.constprop.0+0xaa0/0xaa0 [ 33.288786] ? mark_held_locks+0xf0/0xf0 [ 33.292914] nilfs_mdt_get_block+0xe6/0xd40 [ 33.297211] ? nilfs_mdt_read_block+0x3e0/0x3e0 [ 33.301853] ? lock_downgrade+0x720/0x720 [ 33.305977] ? lock_acquire+0x170/0x3c0 [ 33.309925] ? nilfs_palloc_get_block+0x3a/0x2b0 [ 33.314660] nilfs_palloc_get_block+0xc4/0x2b0 [ 33.319222] nilfs_palloc_get_entry_block+0x17b/0x230 [ 33.324388] ? nilfs_iget+0x1cf/0x860 [ 33.328164] nilfs_ifile_get_inode_block+0xbf/0x170 [ 33.333154] nilfs_iget+0x204/0x860 [ 33.336763] ? nilfs_iget_locked+0xd0/0xd0 [ 33.340979] ? nilfs_attach_log_writer+0x68b/0xa30 [ 33.345919] ? wait_woken+0x250/0x250 [ 33.349695] ? nilfs_mount+0x9df/0xe70 [ 33.353559] nilfs_get_root_dentry+0x26/0x250 [ 33.358030] nilfs_mount+0xac8/0xe70 [ 33.361718] ? nilfs_attach_checkpoint+0x4b0/0x4b0 [ 33.366624] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.371617] ? pcpu_alloc+0xc9/0x1190 [ 33.375395] ? alloc_pages_current+0x19b/0x2a0 [ 33.379959] mount_fs+0xa3/0x310 [ 33.383304] vfs_kern_mount.part.0+0x68/0x470 [ 33.387778] do_mount+0x115c/0x2f50 [ 33.391381] ? lock_acquire+0x170/0x3c0 [ 33.395331] ? check_preemption_disabled+0x41/0x280 [ 33.400324] ? copy_mount_string+0x40/0x40 [ 33.404536] ? copy_mount_options+0x59/0x380 [ 33.408924] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.413917] ? kmem_cache_alloc_trace+0x323/0x380 [ 33.418736] ? copy_mount_options+0x26f/0x380 [ 33.423211] ksys_mount+0xcf/0x130 [ 33.426727] __x64_sys_mount+0xba/0x150 [ 33.430684] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.435244] do_syscall_64+0xf9/0x620 [ 33.439035] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.444202] RIP: 0033:0x7f070057372a [ 33.447892] 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 [ 33.466768] RSP: 002b:00007ffcc3667788 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 33.474453] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f070057372a [ 33.481700] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcc36677a0 [ 33.488945] RBP: 00007ffcc36677a0 R08: 00007ffcc36677e0 R09: 0000555556f452c0 [ 33.496277] R10: 0000000001000010 R11: 0000000000000286 R12: 0000000000000004 [ 33.503523] R13: 00007ffcc36677e0 R14: 000000000000003b R15: 0000000020000788 [ 33.511157] kasan: CONFIG_KASAN_INLINE enabled [ 33.515942] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.523308] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.529542] CPU: 1 PID: 8146 Comm: syz-executor139 Not tainted 4.19.211-syzkaller #0 [ 33.537413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 33.546758] RIP: 0010:nilfs_bmap_lookup_at_level+0xb5/0x3e0 [ 33.552446] 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 [ 33.571334] RSP: 0018:ffff88809506f650 EFLAGS: 00010246 [ 33.576687] RAX: 0000000000000000 RBX: ffff88808b02a098 RCX: 0000000000000000 [ 33.583954] RDX: dffffc0000000000 RSI: ffffffff814a9aa2 RDI: ffff88808b02a158 [ 33.591200] RBP: ffff88809506f738 R08: 0000000000000001 R09: 0000000000000000 [ 33.598449] R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000002 [ 33.605698] R13: 1ffff11012a0decb R14: ffff88808b02a0d0 R15: 0000000000000001 [ 33.612944] FS: 0000555556f45300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.621147] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.627005] CR2: 0000560511f37848 CR3: 00000000a0195000 CR4: 00000000003406e0 [ 33.634268] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.641515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.648759] Call Trace: [ 33.651329] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 33.655645] nilfs_mdt_submit_block.constprop.0+0x1a5/0xaa0 [ 33.661332] ? save_trace+0xd6/0x290 [ 33.665026] ? nilfs_mdt_write_page+0x280/0x280 [ 33.669673] nilfs_mdt_read_block+0x96/0x3e0 [ 33.674062] ? nilfs_mdt_submit_block.constprop.0+0xaa0/0xaa0 [ 33.679923] ? mark_held_locks+0xf0/0xf0 [ 33.683962] nilfs_mdt_get_block+0xe6/0xd40 [ 33.688264] ? nilfs_mdt_read_block+0x3e0/0x3e0 [ 33.692915] ? lock_downgrade+0x720/0x720 [ 33.697128] ? lock_acquire+0x170/0x3c0 [ 33.701078] ? nilfs_palloc_get_block+0x3a/0x2b0 [ 33.705813] nilfs_palloc_get_block+0xc4/0x2b0 [ 33.710462] nilfs_palloc_get_entry_block+0x17b/0x230 [ 33.715632] ? nilfs_iget+0x1cf/0x860 [ 33.719412] nilfs_ifile_get_inode_block+0xbf/0x170 [ 33.724405] nilfs_iget+0x204/0x860 [ 33.728009] ? nilfs_iget_locked+0xd0/0xd0 [ 33.732223] ? nilfs_attach_log_writer+0x68b/0xa30 [ 33.737130] ? wait_woken+0x250/0x250 [ 33.740994] ? nilfs_mount+0x9df/0xe70 [ 33.744857] nilfs_get_root_dentry+0x26/0x250 [ 33.749332] nilfs_mount+0xac8/0xe70 [ 33.753024] ? nilfs_attach_checkpoint+0x4b0/0x4b0 [ 33.757930] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.762937] ? pcpu_alloc+0xc9/0x1190 [ 33.766733] ? alloc_pages_current+0x19b/0x2a0 [ 33.771302] mount_fs+0xa3/0x310 [ 33.774652] vfs_kern_mount.part.0+0x68/0x470 [ 33.779156] do_mount+0x115c/0x2f50 [ 33.782769] ? lock_acquire+0x170/0x3c0 [ 33.786735] ? check_preemption_disabled+0x41/0x280 [ 33.791735] ? copy_mount_string+0x40/0x40 [ 33.795952] ? copy_mount_options+0x59/0x380 [ 33.800346] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.805344] ? kmem_cache_alloc_trace+0x323/0x380 [ 33.810164] ? copy_mount_options+0x26f/0x380 [ 33.814635] ksys_mount+0xcf/0x130 [ 33.818154] __x64_sys_mount+0xba/0x150 [ 33.822106] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.826663] do_syscall_64+0xf9/0x620 [ 33.830445] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.835611] RIP: 0033:0x7f070057372a [ 33.839411] 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 [ 33.858285] RSP: 002b:00007ffcc3667788 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 33.865975] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f070057372a [ 33.873224] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffcc36677a0 [ 33.880483] RBP: 00007ffcc36677a0 R08: 00007ffcc36677e0 R09: 0000555556f452c0 [ 33.887785] R10: 0000000001000010 R11: 0000000000000286 R12: 0000000000000004 [ 33.895032] R13: 00007ffcc36677e0 R14: 000000000000003b R15: 0000000020000788 [ 33.902280] Modules linked in: [ 33.905790] ---[ end trace c7447821c60ad444 ]--- [ 33.910563] RIP: 0010:nilfs_bmap_lookup_at_level+0xb5/0x3e0 [ 33.916569] 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 [ 33.935804] RSP: 0018:ffff88809506f650 EFLAGS: 00010246 [ 33.941168] RAX: 0000000000000000 RBX: ffff88808b02a098 RCX: 0000000000000000 [ 33.949256] RDX: dffffc0000000000 RSI: ffffffff814a9aa2 RDI: ffff88808b02a158 [ 33.956790] RBP: ffff88809506f738 R08: 0000000000000001 R09: 0000000000000000 [ 33.964065] R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000002 [ 33.973013] R13: 1ffff11012a0decb R14: ffff88808b02a0d0 R15: 0000000000000001 [ 33.980515] FS: 0000555556f45300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.989040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.994922] CR2: 0000560511f37848 CR3: 00000000a0195000 CR4: 00000000003406e0 [ 34.002608] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.010116] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.017558] Kernel panic - not syncing: Fatal exception [ 34.023713] Kernel Offset: disabled [ 34.027322] Rebooting in 86400 seconds..