[....] 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..