[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.692288][ T27] audit: type=1800 audit(1582928916.683:25): pid=8785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.711666][ T27] audit: type=1800 audit(1582928916.683:26): pid=8785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.738345][ T27] audit: type=1800 audit(1582928916.683:27): pid=8785 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.599519][ T8938] IPVS: ftp: loaded support on port[0] = 21 [ 80.732269][ T8938] IPVS: ftp: loaded support on port[0] = 21 executing program [ 81.080099][ T8964] IPVS: ftp: loaded support on port[0] = 21 [ 81.139240][ T304] tipc: TX() has been purged, node left! [ 81.470656][ T8964] IPVS: ftp: loaded support on port[0] = 21 executing program [ 81.877254][ T8994] IPVS: ftp: loaded support on port[0] = 21 [ 82.241519][ T8994] IPVS: ftp: loaded support on port[0] = 21 executing program [ 82.670652][ T9009] IPVS: ftp: loaded support on port[0] = 21 [ 82.784998][ T9009] IPVS: ftp: loaded support on port[0] = 21 executing program [ 83.153242][ T9033] IPVS: ftp: loaded support on port[0] = 21 [ 83.428887][ T304] ------------[ cut here ]------------ [ 83.434560][ T304] WARNING: CPU: 0 PID: 304 at drivers/net/geneve.c:1849 geneve_exit_batch_net+0x2b1/0x300 [ 83.444631][ T304] Kernel panic - not syncing: panic_on_warn set ... [ 83.451222][ T304] CPU: 0 PID: 304 Comm: kworker/u4:4 Not tainted 5.6.0-rc3-syzkaller #0 [ 83.459542][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.469614][ T304] Workqueue: netns cleanup_net [ 83.474380][ T304] Call Trace: [ 83.477682][ T304] dump_stack+0x1fb/0x318 [ 83.482026][ T304] panic+0x264/0x7a9 [ 83.485927][ T304] ? __warn+0x105/0x210 [ 83.490086][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.495555][ T304] __warn+0x209/0x210 [ 83.499714][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.505271][ T304] report_bug+0x1b6/0x2f0 [ 83.509609][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.515082][ T304] do_error_trap+0xcf/0x1c0 [ 83.519771][ T304] do_invalid_op+0x36/0x40 [ 83.524339][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.529807][ T304] invalid_op+0x23/0x30 [ 83.533968][ T304] RIP: 0010:geneve_exit_batch_net+0x2b1/0x300 [ 83.540034][ T304] Code: 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 46 aa d1 fc 48 8b 1b 4c 39 fb 74 13 e8 c9 80 94 fc e9 f4 fd ff ff e8 bf 80 94 fc <0f> 0b eb cf e8 b6 80 94 fc eb 05 e8 af 80 94 fc 48 8d 7d c0 e8 c6 [ 83.559871][ T304] RSP: 0018:ffffc90001917c08 EFLAGS: 00010293 [ 83.565944][ T304] RAX: ffffffff84e288c1 RBX: ffff8880a7bc6120 RCX: ffff8880a88304c0 [ 83.573921][ T304] RDX: 0000000000000000 RSI: ffffc90001917c28 RDI: ffff8880a47da068 [ 83.581899][ T304] RBP: ffffc90001917c68 R08: ffffffff866be459 R09: fffffbfff12b21a9 [ 83.590029][ T304] R10: fffffbfff12b21a9 R11: 0000000000000000 R12: ffffc90001917c28 [ 83.598009][ T304] R13: dffffc0000000000 R14: ffff8880a1ca0dd0 R15: ffffc90001917c98 [ 83.606148][ T304] ? unregister_netdevice_queue+0x39/0x480 [ 83.611967][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.617445][ T304] ? geneve_exit_batch_net+0x2b1/0x300 [ 83.622915][ T304] ? geneve_init_net+0xb0/0xb0 [ 83.627693][ T304] cleanup_net+0x78b/0xb80 [ 83.631809][ T9034] IPVS: ftp: loaded support on port[0] = 21 [ 83.632127][ T304] process_one_work+0x7f5/0x10f0 [ 83.642966][ T304] worker_thread+0xbbc/0x1630 [ 83.647689][ T304] kthread+0x332/0x350 [ 83.651774][ T304] ? rcu_lock_release+0x30/0x30 [ 83.656632][ T304] ? kthread_blkcg+0xe0/0xe0 [ 83.661358][ T304] ret_from_fork+0x24/0x30 [ 83.667221][ T304] Kernel Offset: disabled [ 83.671773][ T304] Rebooting in 86400 seconds..