[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.538477][ T26] audit: type=1800 audit(1579968751.775:25): pid=8597 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.557661][ T26] audit: type=1800 audit(1579968751.775:26): pid=8597 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.589654][ T26] audit: type=1800 audit(1579968751.775:27): pid=8597 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 '10.128.0.107' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.957208][ T8759] IPVS: ftp: loaded support on port[0] = 21 [ 72.958150][ T8757] IPVS: ftp: loaded support on port[0] = 21 [ 72.969703][ T8753] IPVS: ftp: loaded support on port[0] = 21 [ 72.976237][ T8761] IPVS: ftp: loaded support on port[0] = 21 [ 72.983952][ T8758] IPVS: ftp: loaded support on port[0] = 21 [ 72.990582][ T8760] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 73.681249][ T8934] list_del corruption, ffff8880a9ae3400->prev is LIST_POISON2 (dead000000000122) [ 73.691041][ T8938] list_del corruption, ffff888099d55800->prev is LIST_POISON2 (dead000000000122) [ 73.701566][ T8938] ------------[ cut here ]------------ [ 73.707251][ T8938] kernel BUG at lib/list_debug.c:50! [ 73.715604][ T8934] ------------[ cut here ]------------ [ 73.721076][ T8934] kernel BUG at lib/list_debug.c:50! [ 73.740823][ T8938] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 73.747057][ T8938] CPU: 0 PID: 8938 Comm: syz-executor625 Not tainted 5.5.0-rc7-syzkaller #0 [ 73.755867][ T8938] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.766013][ T8938] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 73.772063][ T8938] Code: 41 5e 41 5f 5d c3 48 c7 c7 93 0d cf 88 4c 89 f6 31 c0 e8 33 35 c1 fd 0f 0b 48 c7 c7 cb 0d cf 88 4c 89 f6 31 c0 e8 20 35 c1 fd <0f> 0b 48 c7 c7 03 0e cf 88 4c 89 f6 31 c0 e8 0d 35 c1 fd 0f 0b 48 [ 73.791831][ T8938] RSP: 0018:ffffc900023a7780 EFLAGS: 00010246 [ 73.798056][ T8938] RAX: 000000000000004e RBX: ffff8880983452b0 RCX: 7a36b50dad3bbb00 [ 73.806060][ T8938] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 73.814028][ T8938] RBP: ffffc900023a77a0 R08: ffffffff815f9f94 R09: ffffed1015d865e0 [ 73.821996][ T8938] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 73.830046][ T8938] R13: dffffc0000000000 R14: ffff888099d55800 R15: dead000000000122 [ 73.838051][ T8938] FS: 00007fdcea9db700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 73.847768][ T8938] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.854494][ T8938] CR2: 00007ffc5fd3bfe0 CR3: 00000000a0beb000 CR4: 00000000001406f0 [ 73.862568][ T8938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.870818][ T8938] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.878810][ T8938] Call Trace: [ 73.882146][ T8938] __nf_tables_abort+0x16d2/0x2e80 [ 73.891559][ T8938] ? kfree+0x14c/0x220 [ 73.895610][ T8938] ? nfnetlink_rcv+0x122f/0x1e50 [ 73.900541][ T8938] nf_tables_abort+0x15/0x30 [ 73.905126][ T8938] nfnetlink_rcv+0x1a88/0x1e50 [ 73.909957][ T8938] ? rcu_lock_release+0x21/0x30 [ 73.914836][ T8938] ? netlink_deliver_tap+0x142/0x880 [ 73.920159][ T8938] netlink_unicast+0x767/0x920 [ 73.924989][ T8938] netlink_sendmsg+0xa2c/0xd50 [ 73.929742][ T8938] ? netlink_getsockopt+0x9f0/0x9f0 [ 73.935061][ T8938] ____sys_sendmsg+0x4f7/0x7f0 [ 73.939944][ T8938] __sys_sendmsg+0x1ed/0x290 [ 73.944536][ T8938] ? switch_fpu_return+0xe/0x10 [ 73.949388][ T8938] ? prepare_exit_to_usermode+0x221/0x5b0 [ 73.955095][ T8938] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 73.960793][ T8938] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.966238][ T8938] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 73.971998][ T8938] ? do_syscall_64+0x1d/0x1c0 [ 73.976850][ T8938] __x64_sys_sendmsg+0x7f/0x90 [ 73.981699][ T8938] do_syscall_64+0xf7/0x1c0 [ 73.986198][ T8938] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.992122][ T8938] RIP: 0033:0x446d09 [ 73.995993][ T8938] Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 74.015595][ T8938] RSP: 002b:00007fdcea9dad98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 74.024188][ T8938] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446d09 [ 74.032146][ T8938] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 74.040335][ T8938] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 74.048286][ T8938] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 74.056246][ T8938] R13: 000000200a000000 R14: 0000000000006c00 R15: 0000001000000014 [ 74.064431][ T8938] Modules linked in: [ 74.068389][ T8934] invalid opcode: 0000 [#2] PREEMPT SMP KASAN [ 74.070437][ T8938] ---[ end trace ef458363a9d94658 ]--- [ 74.074466][ T8934] CPU: 1 PID: 8934 Comm: syz-executor625 Tainted: G D 5.5.0-rc7-syzkaller #0 [ 74.074471][ T8934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.074487][ T8934] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 74.074499][ T8934] Code: 41 5e 41 5f 5d c3 48 c7 c7 93 0d cf 88 4c 89 f6 31 c0 e8 33 35 c1 fd 0f 0b 48 c7 c7 cb 0d cf 88 4c 89 f6 31 c0 e8 20 35 c1 fd <0f> 0b 48 c7 c7 03 0e cf 88 4c 89 f6 31 c0 e8 0d 35 c1 fd 0f 0b 48 [ 74.080031][ T8938] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 74.090035][ T8934] RSP: 0018:ffffc90002347780 EFLAGS: 00010246 [ 74.090043][ T8934] RAX: 000000000000004e RBX: ffff8880a800f2f0 RCX: e605e6ea3858f200 [ 74.090048][ T8934] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 74.090052][ T8934] RBP: ffffc900023477a0 R08: ffffffff815f9f94 R09: ffffed1015d865e0 [ 74.090056][ T8934] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 74.090061][ T8934] R13: dffffc0000000000 R14: ffff8880a9ae3400 R15: dead000000000122 [ 74.090068][ T8934] FS: 00007fdcea9db700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 74.090073][ T8934] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.090078][ T8934] CR2: 00007fff7e21bc6c CR3: 0000000098b6e000 CR4: 00000000001406e0 [ 74.090086][ T8934] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.090090][ T8934] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.090094][ T8934] Call Trace: [ 74.090112][ T8934] __nf_tables_abort+0x16d2/0x2e80 executing program executing program executing program executing program [ 74.100987][ T8938] Code: 41 5e 41 5f 5d c3 48 c7 c7 93 0d cf 88 4c 89 f6 31 c0 e8 33 35 c1 fd 0f 0b 48 c7 c7 cb 0d cf 88 4c 89 f6 31 c0 e8 20 35 c1 fd <0f> 0b 48 c7 c7 03 0e cf 88 4c 89 f6 31 c0 e8 0d 35 c1 fd 0f 0b 48 [ 74.106464][ T8934] ? kfree+0x14c/0x220 [ 74.106476][ T8934] ? nfnetlink_rcv+0x122f/0x1e50 [ 74.106493][ T8934] nf_tables_abort+0x15/0x30 [ 74.126776][ T8938] RSP: 0018:ffffc900023a7780 EFLAGS: 00010246 [ 74.132462][ T8934] nfnetlink_rcv+0x1a88/0x1e50 [ 74.132491][ T8934] ? rcu_lock_release+0x21/0x30 [ 74.132498][ T8934] ? netlink_deliver_tap+0x142/0x880 [ 74.132511][ T8934] netlink_unicast+0x767/0x920 [ 74.132524][ T8934] netlink_sendmsg+0xa2c/0xd50 [ 74.139581][ T8938] RAX: 000000000000004e RBX: ffff8880983452b0 RCX: 7a36b50dad3bbb00 [ 74.147198][ T8934] ? netlink_getsockopt+0x9f0/0x9f0 [ 74.147210][ T8934] ____sys_sendmsg+0x4f7/0x7f0 [ 74.147226][ T8934] __sys_sendmsg+0x1ed/0x290 [ 74.155606][ T8938] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 74.163177][ T8934] ? switch_fpu_return+0xe/0x10 [ 74.163187][ T8934] ? prepare_exit_to_usermode+0x221/0x5b0 [ 74.163197][ T8934] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 74.163206][ T8934] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 74.163213][ T8934] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 74.163227][ T8934] ? do_syscall_64+0x1d/0x1c0 [ 74.171723][ T8938] RBP: ffffc900023a77a0 R08: ffffffff815f9f94 R09: ffffed1015d865e0 [ 74.179277][ T8934] __x64_sys_sendmsg+0x7f/0x90 [ 74.179290][ T8934] do_syscall_64+0xf7/0x1c0 [ 74.179301][ T8934] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.179314][ T8934] RIP: 0033:0x446d09 [ 74.188574][ T8938] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 74.194816][ T8934] Code: e8 8c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 74.194822][ T8934] RSP: 002b:00007fdcea9dad98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 74.194831][ T8934] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446d09 [ 74.194836][ T8934] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 74.194841][ T8934] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 74.194846][ T8934] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 74.194851][ T8934] R13: 000000200a000000 R14: 0000000000006c00 R15: 0000001000000014 [ 74.194862][ T8934] Modules linked in: [ 74.220008][ T8934] ---[ end trace ef458363a9d94659 ]--- [ 74.222778][ T8938] R13: dffffc0000000000 R14: ffff888099d55800 R15: dead000000000122 [ 74.227933][ T8934] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 74.247732][ T8938] FS: 00007fdcea9db700(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 74.253198][ T8934] Code: 41 5e 41 5f 5d c3 48 c7 c7 93 0d cf 88 4c 89 f6 31 c0 e8 33 35 c1 fd 0f 0b 48 c7 c7 cb 0d cf 88 4c 89 f6 31 c0 e8 20 35 c1 fd <0f> 0b 48 c7 c7 03 0e cf 88 4c 89 f6 31 c0 e8 0d 35 c1 fd 0f 0b 48 [ 74.258801][ T8938] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.266844][ T8934] RSP: 0018:ffffc900023a7780 EFLAGS: 00010246 [ 74.270407][ T8938] CR2: 00007fdcea9b9e78 CR3: 00000000a0beb000 CR4: 00000000001406f0 [ 74.281610][ T8934] RAX: 000000000000004e RBX: ffff8880983452b0 RCX: 7a36b50dad3bbb00 [ 74.293924][ T8938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.301033][ T8934] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 74.313205][ T8938] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.315969][ T8934] RBP: ffffc900023a77a0 R08: ffffffff815f9f94 R09: ffffed1015d865e0 [ 74.329770][ T8938] Kernel panic - not syncing: Fatal exception [ 74.335187][ T8934] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 74.341670][ T8938] Kernel Offset: disabled [ 74.595292][ T8938] Rebooting in 86400 seconds..