[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.333098][ T27] audit: type=1800 audit(1579955384.173:25): pid=9487 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.357802][ T27] audit: type=1800 audit(1579955384.183:26): pid=9487 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.406853][ T27] audit: type=1800 audit(1579955384.183:27): pid=9487 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 '10.128.0.51' (ECDSA) to the list of known hosts. syzkaller login: [ 81.416350][ T9653] IPVS: ftp: loaded support on port[0] = 21 [ 81.421717][ T9647] IPVS: ftp: loaded support on port[0] = 21 [ 81.430774][ T9652] IPVS: ftp: loaded support on port[0] = 21 [ 81.431622][ T9654] IPVS: ftp: loaded support on port[0] = 21 [ 81.441406][ T9650] IPVS: ftp: loaded support on port[0] = 21 [ 81.446646][ T9651] 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 [ 81.905469][ T9728] list_del corruption, ffff8880a9047400->prev is LIST_POISON2 (dead000000000122) [ 81.923730][ T9728] ------------[ cut here ]------------ [ 81.929214][ T9728] kernel BUG at lib/list_debug.c:48! [ 81.936478][ T9728] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 81.942579][ T9728] CPU: 0 PID: 9728 Comm: syz-executor316 Not tainted 5.5.0-rc7-syzkaller #0 [ 81.951281][ T9728] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.961440][ T9728] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 81.967897][ T9728] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 69 71 88 e8 a0 d9 be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 00 6a 71 88 e8 8c d9 be fd <0f> 0b 4c 89 f6 48 c7 c7 c0 6a 71 88 e8 7b d9 be fd 0f 0b cc cc cc [ 81.987574][ T9728] RSP: 0018:ffffc90002137478 EFLAGS: 00010282 [ 81.993629][ T9728] RAX: 000000000000004e RBX: ffff8880a9047400 RCX: 0000000000000000 [ 82.001633][ T9728] RDX: 0000000000000000 RSI: ffffffff815e5566 RDI: fffff52000426e81 [ 82.009599][ T9728] RBP: ffffc90002137490 R08: 000000000000004e R09: ffffed1015d06621 [ 82.017584][ T9728] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 82.025574][ T9728] R13: ffff8880977fd270 R14: ffff8880a9047400 R15: ffff8880976ada80 [ 82.033543][ T9728] FS: 00007f2fc560f700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 82.042470][ T9728] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.049205][ T9728] CR2: 00007f2fc55ede78 CR3: 00000000a6305000 CR4: 00000000001406f0 [ 82.057170][ T9728] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.065143][ T9728] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.073146][ T9728] Call Trace: [ 82.076435][ T9728] __nf_tables_abort+0x1e53/0x2a50 [ 82.081577][ T9728] ? nfnl_err_del+0x115/0x170 [ 82.086285][ T9728] nf_tables_abort+0x17/0x30 [ 82.090869][ T9728] nfnetlink_rcv_batch+0xa5d/0x17a0 [ 82.096067][ T9728] ? nf_tables_delobj+0x8f0/0x8f0 [ 82.101089][ T9728] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 82.106948][ T9728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.113244][ T9728] ? apparmor_capable+0x497/0x900 [ 82.118266][ T9728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.124498][ T9728] ? __nla_validate_parse+0x2d0/0x1ee0 [ 82.129948][ T9728] ? cap_capable+0x205/0x270 [ 82.134525][ T9728] ? nla_memcpy+0xb0/0xb0 [ 82.138891][ T9728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.145157][ T9728] ? ns_capable_common+0x93/0x100 [ 82.150180][ T9728] ? __nla_parse+0x43/0x60 [ 82.154773][ T9728] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 82.160496][ T9728] nfnetlink_rcv+0x3e7/0x460 [ 82.165077][ T9728] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 82.170540][ T9728] ? netlink_deliver_tap+0x24a/0xbe0 [ 82.175815][ T9728] ? __kasan_check_write+0x14/0x20 [ 82.180924][ T9728] netlink_unicast+0x58c/0x7d0 [ 82.185675][ T9728] ? netlink_attachskb+0x870/0x870 [ 82.190773][ T9728] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 82.196477][ T9728] ? __check_object_size+0x3d/0x437 [ 82.201709][ T9728] netlink_sendmsg+0x91c/0xea0 [ 82.206459][ T9728] ? netlink_unicast+0x7d0/0x7d0 [ 82.211394][ T9728] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 82.216940][ T9728] ? apparmor_socket_sendmsg+0x2a/0x30 [ 82.222440][ T9728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.228677][ T9728] ? security_socket_sendmsg+0x8d/0xc0 [ 82.234128][ T9728] ? netlink_unicast+0x7d0/0x7d0 [ 82.239050][ T9728] sock_sendmsg+0xd7/0x130 [ 82.243500][ T9728] ____sys_sendmsg+0x753/0x880 [ 82.248259][ T9728] ? kernel_sendmsg+0x50/0x50 [ 82.252931][ T9728] ? __fget+0x35d/0x550 [ 82.257161][ T9728] ? find_held_lock+0x35/0x130 [ 82.261908][ T9728] ___sys_sendmsg+0x100/0x170 [ 82.266575][ T9728] ? sendmsg_copy_msghdr+0x70/0x70 [ 82.271685][ T9728] ? __kasan_check_read+0x11/0x20 [ 82.276732][ T9728] ? ksys_dup3+0x3e0/0x3e0 [ 82.281150][ T9728] ? __fget_light+0x1a9/0x230 [ 82.286000][ T9728] ? __fdget+0x1b/0x20 [ 82.290062][ T9728] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.296411][ T9728] __sys_sendmsg+0x105/0x1d0 [ 82.300983][ T9728] ? __sys_sendmsg_sock+0xc0/0xc0 [ 82.306014][ T9728] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 82.311480][ T9728] ? do_syscall_64+0x26/0x790 [ 82.316145][ T9728] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.322207][ T9728] ? do_syscall_64+0x26/0x790 [ 82.326882][ T9728] __x64_sys_sendmsg+0x78/0xb0 [ 82.331656][ T9728] do_syscall_64+0xfa/0x790 [ 82.336163][ T9728] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 82.342090][ T9728] RIP: 0033:0x446d09 [ 82.345975][ T9728] 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 [ 82.365573][ T9728] RSP: 002b:00007f2fc560ed98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 82.373981][ T9728] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446d09 [ 82.381980][ T9728] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 82.389943][ T9728] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 82.397935][ T9728] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c executing program executing program executing program [ 82.405922][ T9728] R13: 000000200a000000 R14: 0000000000006c00 R15: 0000001000000014 [ 82.413906][ T9728] Modules linked in: [ 82.419709][ T9728] ---[ end trace f88ab21f2a2cdf97 ]--- [ 82.425186][ T9728] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 82.431916][ T9728] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 a0 69 71 88 e8 a0 d9 be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 00 6a 71 88 e8 8c d9 be fd <0f> 0b 4c 89 f6 48 c7 c7 c0 6a 71 88 e8 7b d9 be fd 0f 0b cc cc cc executing program executing program executing program executing program [ 82.452269][ T9728] RSP: 0018:ffffc90002137478 EFLAGS: 00010282 [ 82.458735][ T9728] RAX: 000000000000004e RBX: ffff8880a9047400 RCX: 0000000000000000 [ 82.466731][ T9728] RDX: 0000000000000000 RSI: ffffffff815e5566 RDI: fffff52000426e81 [ 82.475498][ T9728] RBP: ffffc90002137490 R08: 000000000000004e R09: ffffed1015d06621 [ 82.483845][ T9728] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 82.492143][ T9728] R13: ffff8880977fd270 R14: ffff8880a9047400 R15: ffff8880976ada80 executing program [ 82.500449][ T9728] FS: 00007f2fc560f700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 82.509863][ T9728] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.516491][ T9728] CR2: 00007f2fc55ede78 CR3: 00000000a6305000 CR4: 00000000001406f0 [ 82.526233][ T9728] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.534765][ T9728] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.545031][ T9728] Kernel panic - not syncing: Fatal exception [ 82.552471][ T9728] Kernel Offset: disabled [ 82.556848][ T9728] Rebooting in 86400 seconds..