[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.617725][ T27] audit: type=1800 audit(1579199100.472:25): pid=8804 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.637376][ T27] audit: type=1800 audit(1579199100.472:26): pid=8804 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.678390][ T27] audit: type=1800 audit(1579199100.482:27): pid=8804 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 '10.128.0.48' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.003773][ T8960] kasan: CONFIG_KASAN_INLINE enabled [ 70.010054][ T8960] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 70.018708][ T8960] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 70.025659][ T8960] CPU: 1 PID: 8960 Comm: syz-executor529 Not tainted 5.5.0-rc6-syzkaller #0 [ 70.034339][ T8960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.044396][ T8960] RIP: 0010:nft_chain_parse_hook+0x54c/0xd50 [ 70.050466][ T8960] Code: e8 29 8b dd fa 41 83 fc 06 72 0a e8 6e 87 dd fa e9 d7 03 00 00 4d 8d 7e 18 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 76 07 00 00 bb 01 00 00 00 44 89 e1 d3 e3 45 [ 70.070127][ T8960] RSP: 0018:ffffc90001e67640 EFLAGS: 00010206 [ 70.076225][ T8960] RAX: 0000000000000003 RBX: ffffffff8add4980 RCX: dffffc0000000000 [ 70.084263][ T8960] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 70.092296][ T8960] RBP: ffffc90001e67710 R08: ffffffff8698f647 R09: ffffffff83b522f7 [ 70.100348][ T8960] R10: ffff888097bf4200 R11: 0000000000000004 R12: 0000000000000000 [ 70.108543][ T8960] R13: 1ffff920003ccf00 R14: 0000000000000000 R15: 0000000000000018 [ 70.116548][ T8960] FS: 0000000001584880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 70.125724][ T8960] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.132297][ T8960] CR2: 0000000020000280 CR3: 00000000a82a3000 CR4: 00000000001406e0 [ 70.140259][ T8960] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.148278][ T8960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.156236][ T8960] Call Trace: [ 70.159521][ T8960] nf_tables_newchain+0xec3/0x3ea0 [ 70.164737][ T8960] ? __nla_parse+0x41/0x50 [ 70.169146][ T8960] ? nf_tables_deltable+0xbd0/0xbd0 [ 70.175289][ T8960] nfnetlink_rcv+0xecf/0x1e50 [ 70.180067][ T8960] ? rcu_lock_release+0x21/0x30 [ 70.184902][ T8960] ? netlink_deliver_tap+0x142/0x880 [ 70.190186][ T8960] netlink_unicast+0x767/0x920 [ 70.194942][ T8960] netlink_sendmsg+0xa2c/0xd50 [ 70.199706][ T8960] ? netlink_getsockopt+0x9f0/0x9f0 [ 70.204895][ T8960] ____sys_sendmsg+0x4f7/0x7f0 [ 70.209691][ T8960] __sys_sendmsg+0x1ed/0x290 [ 70.214285][ T8960] ? check_preemption_disabled+0xb4/0x260 [ 70.220100][ T8960] ? debug_smp_processor_id+0x9/0x20 [ 70.225416][ T8960] ? debug_smp_processor_id+0x1c/0x20 [ 70.230896][ T8960] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 70.237178][ T8960] ? prepare_exit_to_usermode+0x221/0x5b0 [ 70.242901][ T8960] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 70.248615][ T8960] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.254073][ T8960] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 70.259796][ T8960] ? do_syscall_64+0x1d/0x1c0 [ 70.264472][ T8960] __x64_sys_sendmsg+0x7f/0x90 [ 70.269217][ T8960] do_syscall_64+0xf7/0x1c0 [ 70.273715][ T8960] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.279764][ T8960] RIP: 0033:0x440559 [ 70.283658][ T8960] 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 [ 70.303337][ T8960] RSP: 002b:00007fffa5f54058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 70.311765][ T8960] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 70.319736][ T8960] RDX: 0000000004000000 RSI: 000000002000d400 RDI: 0000000000000004 [ 70.327709][ T8960] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 70.335709][ T8960] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401de0 [ 70.343693][ T8960] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 70.351667][ T8960] Modules linked in: [ 70.356602][ T8960] ---[ end trace 1a8190f8bf473f0b ]--- [ 70.362083][ T8960] RIP: 0010:nft_chain_parse_hook+0x54c/0xd50 [ 70.368358][ T8960] Code: e8 29 8b dd fa 41 83 fc 06 72 0a e8 6e 87 dd fa e9 d7 03 00 00 4d 8d 7e 18 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <8a> 04 08 84 c0 0f 85 76 07 00 00 bb 01 00 00 00 44 89 e1 d3 e3 45 [ 70.388320][ T8960] RSP: 0018:ffffc90001e67640 EFLAGS: 00010206 [ 70.394419][ T8960] RAX: 0000000000000003 RBX: ffffffff8add4980 RCX: dffffc0000000000 [ 70.402430][ T8960] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 70.410471][ T8960] RBP: ffffc90001e67710 R08: ffffffff8698f647 R09: ffffffff83b522f7 [ 70.418582][ T8960] R10: ffff888097bf4200 R11: 0000000000000004 R12: 0000000000000000 [ 70.426655][ T8960] R13: 1ffff920003ccf00 R14: 0000000000000000 R15: 0000000000000018 [ 70.434677][ T8960] FS: 0000000001584880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 70.443601][ T8960] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.450421][ T8960] CR2: 0000000020000280 CR3: 00000000a82a3000 CR4: 00000000001406e0 [ 70.458441][ T8960] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.466446][ T8960] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.474443][ T8960] Kernel panic - not syncing: Fatal exception [ 70.482085][ T8960] Kernel Offset: disabled [ 70.486419][ T8960] Rebooting in 86400 seconds..