[ 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 '10.128.1.105' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.435078] kasan: CONFIG_KASAN_INLINE enabled [ 27.439667] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.446999] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.453201] Modules linked in: [ 27.456367] CPU: 0 PID: 7986 Comm: syz-executor394 Not tainted 4.14.295-syzkaller #0 [ 27.464218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 27.473548] task: ffff8880982d4200 task.stack: ffff8880b3330000 [ 27.479584] RIP: 0010:__bfs.part.0+0x20e/0x470 [ 27.484136] RSP: 0018:ffff8880b3337370 EFLAGS: 00010007 [ 27.489468] RAX: 0000000001d0dd96 RBX: ffffffff8bb1d250 RCX: 0000000000000000 [ 27.496708] RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000010 [ 27.503949] RBP: ffff8880b3337428 R08: 0000000000000000 R09: 0000000000001c26 [ 27.511188] R10: 0000000000000002 R11: 0000000000000001 R12: ffffffff8140f610 [ 27.518429] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000 [ 27.525671] FS: 0000555555759300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 27.533868] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.539719] CR2: 00000000200000c4 CR3: 00000000b0305000 CR4: 00000000003406f0 [ 27.546962] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.554205] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.561445] Call Trace: [ 27.564010] ? is_bpf_text_address+0xb8/0x150 [ 27.568478] check_usage_backwards+0x167/0x2c0 [ 27.573032] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.578366] ? check_usage_forwards+0x2d0/0x2d0 [ 27.583006] ? save_trace+0xd6/0x290 [ 27.586689] mark_lock+0x3c7/0x1050 [ 27.590289] ? check_usage_forwards+0x2d0/0x2d0 [ 27.594930] __lock_acquire+0x594/0x3f20 [ 27.598963] ? mem_cgroup_commit_charge+0x17c/0x3b0 [ 27.603947] ? trace_hardirqs_on+0x10/0x10 [ 27.608150] ? trace_hardirqs_on+0x10/0x10 [ 27.612355] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.617777] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.622765] ? alloc_buffer_head+0x20/0x110 [ 27.627054] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.632473] lock_acquire+0x170/0x3f0 [ 27.636252] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.641325] down_read+0x36/0x80 [ 27.644661] ? nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.649735] nilfs_bmap_lookup_at_level+0x6b/0x380 [ 27.654634] ? nilfs_bmap_get_dat+0xc0/0xc0 [ 27.658929] nilfs_mdt_submit_block.constprop.0+0x152/0x970 [ 27.664613] ? nilfs_mdt_write_page+0x250/0x250 [ 27.669282] nilfs_mdt_read_block+0x7c/0x320 [ 27.673666] ? nilfs_mdt_submit_block.constprop.0+0x970/0x970 [ 27.679520] ? __lock_acquire+0x2190/0x3f20 [ 27.683812] nilfs_mdt_get_block+0xc7/0xb90 [ 27.688104] ? nilfs_mdt_read_block+0x320/0x320 [ 27.692744] ? lock_downgrade+0x740/0x740 [ 27.696863] nilfs_palloc_get_block+0xb2/0x250 [ 27.701419] nilfs_palloc_get_entry_block+0x17d/0x230 [ 27.706579] ? nilfs_iget+0x18e/0x810 [ 27.710352] nilfs_ifile_get_inode_block+0xb4/0x150 [ 27.715342] nilfs_iget+0x1c2/0x810 [ 27.718938] ? nilfs_iget_locked+0xb0/0xb0 [ 27.723142] ? nilfs_attach_log_writer+0x64d/0x9d0 [ 27.728039] ? nilfs_detach_log_writer+0x980/0x980 [ 27.732942] ? wait_woken+0x230/0x230 [ 27.736714] nilfs_get_root_dentry+0x24/0x1f0 [ 27.741180] nilfs_mount+0x984/0xd00 [ 27.744864] ? nilfs_attach_checkpoint+0x420/0x420 [ 27.749763] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 27.755183] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.760172] ? alloc_pages_current+0x15d/0x260 [ 27.764726] ? __lockdep_init_map+0x100/0x560 [ 27.769193] mount_fs+0x92/0x2a0 [ 27.772533] vfs_kern_mount.part.0+0x5b/0x470 [ 27.776999] do_mount+0xe65/0x2a30 [ 27.780512] ? copy_mount_string+0x40/0x40 [ 27.784718] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.789707] ? copy_mnt_ns+0xa30/0xa30 [ 27.793567] ? copy_mount_options+0x1fa/0x2f0 [ 27.798034] ? copy_mnt_ns+0xa30/0xa30 [ 27.801895] SyS_mount+0xa8/0x120 [ 27.805320] ? copy_mnt_ns+0xa30/0xa30 [ 27.809180] do_syscall_64+0x1d5/0x640 [ 27.813044] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.818202] RIP: 0033:0x7f5ca2a4d6aa [ 27.821886] RSP: 002b:00007ffca0d61138 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 27.829565] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f5ca2a4d6aa [ 27.836808] RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 00007ffca0d61150 [ 27.844048] RBP: 00007ffca0d61150 R08: 00007ffca0d61190 R09: 00005555557592c0 [ 27.851288] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004 [ 27.858531] R13: 00007ffca0d61190 R14: 0000000000000039 R15: 0000000020000758 [ 27.865772] Code: 78 01 00 00 4d 8b 36 4c 39 f3 74 78 49 8d 7e 10 4c 89 f0 4c 8b 0d a3 69 a7 0a 48 89 fa 48 2d 60 9a c8 8b 48 c1 ea 03 48 c1 f8 06 <42> 80 3c 3a 00 0f 85 28 01 00 00 49 8b 4e 10 4c 8d 41 2c 4c 89 [ 27.884808] RIP: __bfs.part.0+0x20e/0x470 RSP: ffff8880b3337370 [ 27.890839] ---[ end trace cacd434ed93c8ae1 ]--- [ 27.895561] Kernel panic - not syncing: Fatal exception [ 28.987078] Shutting down cpus with NMI [ 28.991235] Kernel Offset: disabled [ 28.994839] Rebooting in 86400 seconds..