[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 93.159235][ T27] audit: type=1800 audit(1579120874.937:25): pid=9279 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 93.179017][ T27] audit: type=1800 audit(1579120874.937:26): pid=9279 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 93.221348][ T27] audit: type=1800 audit(1579120874.937:27): pid=9279 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 '10.128.0.95' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 104.586333][ T9434] list_del corruption, ffff8880a3707800->prev is LIST_POISON2 (dead000000000122) [ 104.595848][ T9434] ------------[ cut here ]------------ [ 104.601305][ T9434] kernel BUG at lib/list_debug.c:48! [ 104.606707][ T9434] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 104.612782][ T9434] CPU: 1 PID: 9434 Comm: syz-executor509 Not tainted 5.5.0-rc5-syzkaller #0 [ 104.621470][ T9434] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.631522][ T9434] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 104.637994][ T9434] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 20 67 71 88 e8 50 bd be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 80 67 71 88 e8 3c bd be fd <0f> 0b 4c 89 f6 48 c7 c7 40 68 71 88 e8 2b bd be fd 0f 0b cc cc cc [ 104.657718][ T9434] RSP: 0018:ffffc900020ff3f0 EFLAGS: 00010282 [ 104.663770][ T9434] RAX: 000000000000004e RBX: ffff8880a3707800 RCX: 0000000000000000 [ 104.671755][ T9434] RDX: 0000000000000000 RSI: ffffffff815e5e56 RDI: fffff5200041fe70 [ 104.679709][ T9434] RBP: ffffc900020ff408 R08: 000000000000004e R09: ffffed1015d26621 [ 104.687663][ T9434] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: dead000000000122 [ 104.695611][ T9434] R13: ffff8880a8b8d580 R14: ffff8880a3707800 R15: dffffc0000000000 [ 104.703570][ T9434] FS: 0000000001317880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 104.712475][ T9434] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.719038][ T9434] CR2: 0000000020003ac0 CR3: 0000000081f48000 CR4: 00000000001406e0 [ 104.727021][ T9434] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.734991][ T9434] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.743162][ T9434] Call Trace: [ 104.746433][ T9434] nf_tables_commit+0x1068/0x3b30 [ 104.751482][ T9434] ? nla_memcpy+0xb0/0xb0 [ 104.755790][ T9434] ? nf_tables_setelem_notify.constprop.0+0x1f0/0x1f0 [ 104.762529][ T9434] ? __nla_parse+0x43/0x60 [ 104.766927][ T9434] nfnetlink_rcv_batch+0xc78/0x17a0 [ 104.772115][ T9434] ? nf_tables_getset+0x51/0x680 [ 104.777035][ T9434] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 104.782820][ T9434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.789074][ T9434] ? apparmor_capable+0x497/0x900 [ 104.794082][ T9434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.800298][ T9434] ? __nla_validate_parse+0x2d0/0x1ee0 [ 104.805741][ T9434] ? cap_capable+0x205/0x270 [ 104.810324][ T9434] ? nla_memcpy+0xb0/0xb0 [ 104.814789][ T9434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.821012][ T9434] ? ns_capable_common+0x93/0x100 [ 104.826017][ T9434] ? __nla_parse+0x43/0x60 [ 104.830425][ T9434] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 104.836163][ T9434] nfnetlink_rcv+0x3e7/0x460 [ 104.840735][ T9434] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 104.846174][ T9434] ? netlink_deliver_tap+0x24a/0xbf0 [ 104.851440][ T9434] ? __kasan_check_write+0x14/0x20 [ 104.856543][ T9434] netlink_unicast+0x59e/0x7e0 [ 104.861295][ T9434] ? netlink_attachskb+0x870/0x870 [ 104.866386][ T9434] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 104.872083][ T9434] ? __check_object_size+0x3d/0x437 [ 104.877260][ T9434] netlink_sendmsg+0x91c/0xea0 [ 104.882003][ T9434] ? netlink_unicast+0x7e0/0x7e0 [ 104.886916][ T9434] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 104.892439][ T9434] ? apparmor_socket_sendmsg+0x2a/0x30 [ 104.897889][ T9434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.904127][ T9434] ? security_socket_sendmsg+0x8d/0xc0 [ 104.909571][ T9434] ? netlink_unicast+0x7e0/0x7e0 [ 104.914490][ T9434] sock_sendmsg+0xd7/0x130 [ 104.918884][ T9434] ____sys_sendmsg+0x753/0x880 [ 104.923628][ T9434] ? kernel_sendmsg+0x50/0x50 [ 104.928285][ T9434] ? _raw_spin_unlock+0x28/0x40 [ 104.933113][ T9434] ? do_huge_pmd_wp_page+0x53a/0x21c0 [ 104.938466][ T9434] ___sys_sendmsg+0x100/0x170 [ 104.943122][ T9434] ? sendmsg_copy_msghdr+0x70/0x70 [ 104.948217][ T9434] ? fault_around_bytes_set+0xa0/0xa0 [ 104.953582][ T9434] ? __do_page_fault+0x56a/0xd80 [ 104.958499][ T9434] ? find_held_lock+0x35/0x130 [ 104.963247][ T9434] ? __do_page_fault+0x56a/0xd80 [ 104.968164][ T9434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.974384][ T9434] ? __fget_light+0x1a9/0x230 [ 104.979048][ T9434] ? __fdget+0x1b/0x20 [ 104.983092][ T9434] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 104.989416][ T9434] __sys_sendmsg+0x105/0x1d0 [ 104.993984][ T9434] ? __sys_sendmsg_sock+0xc0/0xc0 [ 104.998984][ T9434] ? down_read_non_owner+0x490/0x490 [ 105.004249][ T9434] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.009684][ T9434] ? do_syscall_64+0x26/0x790 [ 105.014340][ T9434] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.020380][ T9434] ? do_syscall_64+0x26/0x790 [ 105.025034][ T9434] __x64_sys_sendmsg+0x78/0xb0 [ 105.029784][ T9434] do_syscall_64+0xfa/0x790 [ 105.035569][ T9434] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.041444][ T9434] RIP: 0033:0x441aa9 [ 105.045319][ T9434] 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 [ 105.064945][ T9434] RSP: 002b:00007fff013ecaf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 105.073470][ T9434] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441aa9 [ 105.081439][ T9434] RDX: 0000000000000042 RSI: 0000000020003ac0 RDI: 0000000000000003 [ 105.089396][ T9434] RBP: 0000000000006f6c R08: 00000000004002c8 R09: 00000000004002c8 [ 105.097347][ T9434] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004028d0 [ 105.105296][ T9434] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 105.113260][ T9434] Modules linked in: [ 105.117441][ T9434] ---[ end trace 607d801d199f542d ]--- [ 105.122963][ T9434] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 105.129357][ T9434] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 20 67 71 88 e8 50 bd be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 80 67 71 88 e8 3c bd be fd <0f> 0b 4c 89 f6 48 c7 c7 40 68 71 88 e8 2b bd be fd 0f 0b cc cc cc [ 105.149095][ T9434] RSP: 0018:ffffc900020ff3f0 EFLAGS: 00010282 [ 105.155197][ T9434] RAX: 000000000000004e RBX: ffff8880a3707800 RCX: 0000000000000000 [ 105.163186][ T9434] RDX: 0000000000000000 RSI: ffffffff815e5e56 RDI: fffff5200041fe70 [ 105.171176][ T9434] RBP: ffffc900020ff408 R08: 000000000000004e R09: ffffed1015d26621 [ 105.179178][ T9434] R10: ffffed1015d26620 R11: ffff8880ae933107 R12: dead000000000122 [ 105.187170][ T9434] R13: ffff8880a8b8d580 R14: ffff8880a3707800 R15: dffffc0000000000 [ 105.195169][ T9434] FS: 0000000001317880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 105.204110][ T9434] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.210675][ T9434] CR2: 0000000020003ac0 CR3: 0000000081f48000 CR4: 00000000001406e0 [ 105.218681][ T9434] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 105.226675][ T9434] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 105.234704][ T9434] Kernel panic - not syncing: Fatal exception [ 105.242142][ T9434] Kernel Offset: disabled [ 105.246483][ T9434] Rebooting in 86400 seconds..