[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ 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... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.344811] audit: type=1400 audit(1602427790.651:8): avc: denied { execmem } for pid=6361 comm="syz-executor030" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 32.366852] IPVS: ftp: loaded support on port[0] = 21 [ 32.514498] ------------[ cut here ]------------ [ 32.519394] kernel BUG at fs/notify/dnotify/dnotify.c:131! [ 32.526347] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 32.532235] Modules linked in: [ 32.535435] CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.198-syzkaller #0 [ 32.542766] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.552139] Workqueue: events_unbound fsnotify_mark_destroy_workfn [ 32.558474] task: ffff8880a982c140 task.stack: ffff8880a9838000 [ 32.564511] RIP: 0010:dnotify_free_mark+0x45/0x50 [ 32.569341] RSP: 0018:ffff8880a983fca0 EFLAGS: 00010297 [ 32.574680] RAX: ffff8880a982c140 RBX: ffffffff86b3cae0 RCX: 1ffff11015307fa2 [ 32.581941] RDX: 0000000000000000 RSI: ffff8880a982c9f0 RDI: ffff8880a7e53bb8 [ 32.589208] RBP: ffff8880a7e53b40 R08: ffffffff8a0ac838 R09: 0000000000000000 [ 32.596455] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a61a4a80 [ 32.603701] R13: ffff8880a983fd00 R14: ffff8880a7e53b50 R15: ffff8880a7e53b58 [ 32.610950] FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 32.619151] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.625544] CR2: 00007f3108cda008 CR3: 0000000089583000 CR4: 00000000001406f0 [ 32.632804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.640062] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.647314] Call Trace: [ 32.649891] fsnotify_final_mark_destroy+0x77/0xb0 [ 32.655041] fsnotify_mark_destroy_workfn+0x1ec/0x2e0 [ 32.660224] ? lock_acquire+0x170/0x3f0 [ 32.664176] ? fsnotify_final_mark_destroy+0xb0/0xb0 [ 32.669259] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 32.674706] process_one_work+0x793/0x14a0 [ 32.678920] ? work_busy+0x320/0x320 [ 32.682619] ? worker_thread+0x158/0xff0 [ 32.686680] ? _raw_spin_unlock_irq+0x24/0x80 [ 32.691174] worker_thread+0x5cc/0xff0 [ 32.695145] ? rescuer_thread+0xc80/0xc80 [ 32.699292] kthread+0x30d/0x420 [ 32.702638] ? kthread_create_on_node+0xd0/0xd0 [ 32.707544] ret_from_fork+0x24/0x30 [ 32.711324] Code: 48 c1 ea 03 80 3c 02 00 75 23 48 83 7d 78 00 75 15 e8 40 60 bf ff 48 89 ee 48 8b 3d 5e f2 f6 06 5d e9 e0 fc e8 ff e8 2b 60 bf ff <0f> 0b e8 64 33 e9 ff eb d6 66 90 41 57 41 56 41 55 41 54 49 89 [ 32.730410] RIP: dnotify_free_mark+0x45/0x50 RSP: ffff8880a983fca0 [ 32.744349] ---[ end trace e760a4d3fdba4aca ]--- [ 32.749113] Kernel panic - not syncing: Fatal exception [ 32.756110] Kernel Offset: disabled [ 32.759817] Rebooting in 86400 seconds..