[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 48.254521][ T27] audit: type=1800 audit(1579130244.697:25): pid=8371 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 48.273658][ T27] audit: type=1800 audit(1579130244.697:26): pid=8371 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 48.308147][ T27] audit: type=1800 audit(1579130244.707:27): pid=8371 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 '10.128.0.185' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.913565][ T8526] kasan: CONFIG_KASAN_INLINE enabled [ 60.918979][ T8526] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 60.927019][ T8526] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 60.933927][ T8526] CPU: 1 PID: 8526 Comm: syz-executor229 Not tainted 5.5.0-rc6-syzkaller #0 [ 60.942575][ T8526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.952626][ T8526] RIP: 0010:nft_tunnel_get_init+0x9b/0x330 [ 60.958412][ T8526] Code: 24 00 0f 84 c3 01 00 00 e8 12 7e d8 fa 49 bc 00 00 00 00 00 fc ff df 4c 89 7d c0 49 83 c6 08 48 83 c3 04 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 ae 01 00 00 8b 1b 0f cb 4d 89 f7 49 c1 ef [ 60.977998][ T8526] RSP: 0018:ffffc90001df76c8 EFLAGS: 00010247 [ 60.984038][ T8526] RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88808d6c2000 [ 60.991984][ T8526] RDX: 0000000000000000 RSI: ffff8880a2594b98 RDI: ffffc90001df77b8 [ 60.999928][ T8526] RBP: ffffc90001df7708 R08: ffffffff86977bb8 R09: ffffed1015da6fc5 [ 61.007874][ T8526] R10: ffffed1015da6fc5 R11: 0000000000000000 R12: dffffc0000000000 [ 61.015824][ T8526] R13: ffff888093970008 R14: ffff8880a2594ba0 R15: ffffc90001df77b8 [ 61.023768][ T8526] FS: 000000000213a880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 61.032664][ T8526] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.039258][ T8526] CR2: 00000000200009c6 CR3: 00000000923e8000 CR4: 00000000001406e0 [ 61.047234][ T8526] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.055188][ T8526] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.063133][ T8526] Call Trace: [ 61.066401][ T8526] nf_tables_newrule+0x1541/0x2d90 [ 61.071496][ T8526] ? __nla_parse+0x41/0x50 [ 61.075886][ T8526] ? nf_tables_delchain+0xd40/0xd40 [ 61.081107][ T8526] nfnetlink_rcv+0xecf/0x1e50 [ 61.085780][ T8526] ? rcu_lock_release+0x21/0x30 [ 61.090606][ T8526] ? netlink_deliver_tap+0x142/0x880 [ 61.095864][ T8526] netlink_unicast+0x767/0x920 [ 61.100607][ T8526] netlink_sendmsg+0xa2c/0xd50 [ 61.105388][ T8526] ? netlink_getsockopt+0x9f0/0x9f0 [ 61.110561][ T8526] ____sys_sendmsg+0x4f7/0x7f0 [ 61.115300][ T8526] __sys_sendmsg+0x1ed/0x290 [ 61.119877][ T8526] ? check_preemption_disabled+0xb4/0x260 [ 61.125571][ T8526] ? debug_smp_processor_id+0x9/0x20 [ 61.130831][ T8526] ? debug_smp_processor_id+0x1c/0x20 [ 61.136173][ T8526] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 61.142213][ T8526] ? prepare_exit_to_usermode+0x221/0x5b0 [ 61.147903][ T8526] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 61.153606][ T8526] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 61.159041][ T8526] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 61.164738][ T8526] ? do_syscall_64+0x1d/0x1c0 [ 61.169388][ T8526] __x64_sys_sendmsg+0x7f/0x90 [ 61.174122][ T8526] do_syscall_64+0xf7/0x1c0 [ 61.178599][ T8526] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.184493][ T8526] RIP: 0033:0x4407b9 [ 61.188361][ T8526] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 61.208025][ T8526] RSP: 002b:00007ffd61e6f9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 61.216414][ T8526] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004407b9 [ 61.224357][ T8526] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 [ 61.232330][ T8526] RBP: 00000000006ca018 R08: 0000000000000001 R09: 00000000004002c8 [ 61.240274][ T8526] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000402040 [ 61.248217][ T8526] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 61.256164][ T8526] Modules linked in: [ 61.260607][ T8526] ---[ end trace e001d1c2698e18d8 ]--- [ 61.266067][ T8526] RIP: 0010:nft_tunnel_get_init+0x9b/0x330 [ 61.271988][ T8526] Code: 24 00 0f 84 c3 01 00 00 e8 12 7e d8 fa 49 bc 00 00 00 00 00 fc ff df 4c 89 7d c0 49 83 c6 08 48 83 c3 04 48 89 d8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 ae 01 00 00 8b 1b 0f cb 4d 89 f7 49 c1 ef [ 61.291615][ T8526] RSP: 0018:ffffc90001df76c8 EFLAGS: 00010247 [ 61.297664][ T8526] RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88808d6c2000 [ 61.305651][ T8526] RDX: 0000000000000000 RSI: ffff8880a2594b98 RDI: ffffc90001df77b8 [ 61.313723][ T8526] RBP: ffffc90001df7708 R08: ffffffff86977bb8 R09: ffffed1015da6fc5 [ 61.321712][ T8526] R10: ffffed1015da6fc5 R11: 0000000000000000 R12: dffffc0000000000 [ 61.329683][ T8526] R13: ffff888093970008 R14: ffff8880a2594ba0 R15: ffffc90001df77b8 [ 61.337637][ T8526] FS: 000000000213a880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 61.346667][ T8526] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.353245][ T8526] CR2: 00000000200009c6 CR3: 00000000923e8000 CR4: 00000000001406e0 [ 61.361220][ T8526] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.369292][ T8526] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.377244][ T8526] Kernel panic - not syncing: Fatal exception [ 61.384300][ T8526] Kernel Offset: disabled [ 61.388612][ T8526] Rebooting in 86400 seconds..