[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   84.453424][   T27] audit: type=1800 audit(1579137300.702:25): pid=9306 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   84.486345][   T27] audit: type=1800 audit(1579137300.702:26): pid=9306 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   84.526197][   T27] audit: type=1800 audit(1579137300.702:27): pid=9306 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.103' (ECDSA) to the list of known hosts.
executing program
executing program
syzkaller login: [   95.380769][ T9465] list_del corruption, ffff88809f00d000->prev is LIST_POISON2 (dead000000000122)
[   95.390377][ T9465] ------------[ cut here ]------------
[   95.395818][ T9465] kernel BUG at lib/list_debug.c:48!
[   95.401146][ T9465] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   95.407202][ T9465] CPU: 0 PID: 9465 Comm: syz-executor066 Not tainted 5.5.0-rc6-syzkaller #0
[   95.416381][ T9465] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   95.426642][ T9465] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f
[   95.433043][ T9465] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 20 66 71 88 e8 c0 e7 be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 80 66 71 88 e8 ac e7 be fd <0f> 0b 4c 89 f6 48 c7 c7 40 67 71 88 e8 9b e7 be fd 0f 0b cc cc cc
[   95.452626][ T9465] RSP: 0018:ffffc900021073f0 EFLAGS: 00010282
[   95.458666][ T9465] RAX: 000000000000004e RBX: ffff88809f00d000 RCX: 0000000000000000
[   95.466610][ T9465] RDX: 0000000000000000 RSI: ffffffff815e5396 RDI: fffff52000420e70
[   95.474601][ T9465] RBP: ffffc90002107408 R08: 000000000000004e R09: ffffed1015d06621
[   95.482551][ T9465] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122
[   95.490500][ T9465] R13: ffff8880979a9580 R14: ffff88809f00d000 R15: dffffc0000000000
[   95.498449][ T9465] FS:  00000000017bf880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   95.507523][ T9465] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   95.514090][ T9465] CR2: 0000000020003ac0 CR3: 000000009a5c1000 CR4: 00000000001406f0
[   95.522082][ T9465] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   95.530032][ T9465] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   95.538014][ T9465] Call Trace:
[   95.541378][ T9465]  nf_tables_commit+0x1068/0x3b30
[   95.546420][ T9465]  ? nla_memcpy+0xb0/0xb0
[   95.550736][ T9465]  ? nf_tables_setelem_notify.constprop.0+0x1f0/0x1f0
[   95.557619][ T9465]  ? __nla_parse+0x43/0x60
[   95.562059][ T9465]  nfnetlink_rcv_batch+0xc78/0x17a0
[   95.567237][ T9465]  ? nf_tables_dump_chains+0x6c1/0x8e0
[   95.572715][ T9465]  ? nfnetlink_subsys_register+0x2b0/0x2b0
[   95.578500][ T9465]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.584714][ T9465]  ? apparmor_capable+0x497/0x900
[   95.589718][ T9465]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.595930][ T9465]  ? __nla_validate_parse+0x2d0/0x1ee0
[   95.601366][ T9465]  ? cap_capable+0x205/0x270
[   95.605931][ T9465]  ? nla_memcpy+0xb0/0xb0
[   95.610324][ T9465]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.616538][ T9465]  ? ns_capable_common+0x93/0x100
[   95.621537][ T9465]  ? __nla_parse+0x43/0x60
[   95.625930][ T9465]  ? __sanitizer_cov_trace_cmp4+0x16/0x20
[   95.631624][ T9465]  nfnetlink_rcv+0x3e7/0x460
[   95.636191][ T9465]  ? nfnetlink_rcv_batch+0x17a0/0x17a0
[   95.641626][ T9465]  ? netlink_deliver_tap+0x24a/0xbe0
[   95.646977][ T9465]  ? __kasan_check_write+0x14/0x20
[   95.652063][ T9465]  netlink_unicast+0x58c/0x7d0
[   95.656819][ T9465]  ? netlink_attachskb+0x870/0x870
[   95.661904][ T9465]  ? __sanitizer_cov_trace_cmp8+0x18/0x20
[   95.667610][ T9465]  ? __check_object_size+0x3d/0x437
[   95.672793][ T9465]  netlink_sendmsg+0x91c/0xea0
[   95.677538][ T9465]  ? netlink_unicast+0x7d0/0x7d0
[   95.682447][ T9465]  ? aa_sock_msg_perm.isra.0+0xba/0x170
[   95.687970][ T9465]  ? apparmor_socket_sendmsg+0x2a/0x30
[   95.693404][ T9465]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.699625][ T9465]  ? security_socket_sendmsg+0x8d/0xc0
[   95.705178][ T9465]  ? netlink_unicast+0x7d0/0x7d0
[   95.710093][ T9465]  sock_sendmsg+0xd7/0x130
[   95.714587][ T9465]  ____sys_sendmsg+0x753/0x880
[   95.719342][ T9465]  ? kernel_sendmsg+0x50/0x50
[   95.724002][ T9465]  ? _raw_spin_unlock+0x28/0x40
[   95.728828][ T9465]  ? do_huge_pmd_wp_page+0x53a/0x21c0
[   95.734411][ T9465]  ___sys_sendmsg+0x100/0x170
[   95.739068][ T9465]  ? sendmsg_copy_msghdr+0x70/0x70
[   95.744307][ T9465]  ? fault_around_bytes_set+0xa0/0xa0
[   95.749766][ T9465]  ? __do_page_fault+0x56a/0xd80
[   95.754688][ T9465]  ? find_held_lock+0x35/0x130
[   95.759469][ T9465]  ? __do_page_fault+0x56a/0xd80
[   95.764386][ T9465]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.770603][ T9465]  ? __fget_light+0x1a9/0x230
[   95.775261][ T9465]  ? __fdget+0x1b/0x20
[   95.779305][ T9465]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.785541][ T9465]  __sys_sendmsg+0x105/0x1d0
[   95.790114][ T9465]  ? __sys_sendmsg_sock+0xc0/0xc0
[   95.795125][ T9465]  ? down_read_non_owner+0x490/0x490
[   95.800388][ T9465]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   95.805824][ T9465]  ? do_syscall_64+0x26/0x790
[   95.810478][ T9465]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   95.816551][ T9465]  ? do_syscall_64+0x26/0x790
[   95.821311][ T9465]  __x64_sys_sendmsg+0x78/0xb0
[   95.826060][ T9465]  do_syscall_64+0xfa/0x790
[   95.830540][ T9465]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   95.836404][ T9465] RIP: 0033:0x441aa9
[   95.840276][ T9465] Code: e8 fc ab 02 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   95.859855][ T9465] RSP: 002b:00007ffde62d5e98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   95.868256][ T9465] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441aa9
[   95.876209][ T9465] RDX: 0000000000000042 RSI: 0000000020003ac0 RDI: 0000000000000003
[   95.884174][ T9465] RBP: 0000000000006f6c R08: 00000000004002c8 R09: 00000000004002c8
[   95.892126][ T9465] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004028d0
[   95.900075][ T9465] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000
[   95.908024][ T9465] Modules linked in:
[   95.912868][ T9465] ---[ end trace c8b054177422087f ]---
[   95.918423][ T9465] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f
[   95.924813][ T9465] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 20 66 71 88 e8 c0 e7 be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 80 66 71 88 e8 ac e7 be fd <0f> 0b 4c 89 f6 48 c7 c7 40 67 71 88 e8 9b e7 be fd 0f 0b cc cc cc
[   95.944470][ T9465] RSP: 0018:ffffc900021073f0 EFLAGS: 00010282
[   95.950567][ T9465] RAX: 000000000000004e RBX: ffff88809f00d000 RCX: 0000000000000000
[   95.958565][ T9465] RDX: 0000000000000000 RSI: ffffffff815e5396 RDI: fffff52000420e70
[   95.966553][ T9465] RBP: ffffc90002107408 R08: 000000000000004e R09: ffffed1015d06621
[   95.974516][ T9465] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122
[   95.982529][ T9465] R13: ffff8880979a9580 R14: ffff88809f00d000 R15: dffffc0000000000
[   95.990533][ T9465] FS:  00000000017bf880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   95.999483][ T9465] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   96.006064][ T9465] CR2: 0000000020003ac0 CR3: 000000009a5c1000 CR4: 00000000001406f0
[   96.014088][ T9465] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   96.022067][ T9465] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   96.030090][ T9465] Kernel panic - not syncing: Fatal exception
[   96.037397][ T9465] Kernel Offset: disabled
[   96.041725][ T9465] Rebooting in 86400 seconds..