[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.978285][ T27] audit: type=1800 audit(1579594040.629:25): pid=9614 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.998209][ T27] audit: type=1800 audit(1579594040.639:26): pid=9614 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.052521][ T27] audit: type=1800 audit(1579594040.639:27): pid=9614 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 '10.128.0.117' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 81.403761][ T9775] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.416598][ T9782] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.426581][ T9786] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.438852][ T9783] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.519718][ T9784] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. executing program executing program executing program executing program executing program executing program [ 81.950801][ T9799] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.961219][ T9801] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.974097][ T9804] netlink: 20 bytes leftover after parsing attributes in process `syz-executor778'. [ 81.985559][ T9799] list_del corruption, ffff888098c85400->prev is LIST_POISON2 (dead000000000122) [ 81.995481][ T9799] ------------[ cut here ]------------ [ 82.000981][ T9799] kernel BUG at lib/list_debug.c:48! [ 82.006597][ T9799] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 82.012674][ T9799] CPU: 0 PID: 9799 Comm: syz-executor778 Not tainted 5.5.0-rc7-syzkaller #0 [ 82.021333][ T9799] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.031381][ T9799] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 82.037791][ T9799] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 60 69 71 88 e8 e0 de be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 c0 69 71 88 e8 cc de be fd <0f> 0b 4c 89 f6 48 c7 c7 80 6a 71 88 e8 bb de be fd 0f 0b cc cc cc [ 82.057434][ T9799] RSP: 0018:ffffc900022a7468 EFLAGS: 00010286 [ 82.063489][ T9799] RAX: 000000000000004e RBX: ffff888098c85400 RCX: 0000000000000000 [ 82.071446][ T9799] RDX: 0000000000000000 RSI: ffffffff815e5326 RDI: fffff52000454e7f [ 82.079403][ T9799] RBP: ffffc900022a7480 R08: 000000000000004e R09: ffffed1015d06621 [ 82.087353][ T9799] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 82.095358][ T9799] R13: ffffffff8a4c74b0 R14: ffff888098c85400 R15: ffff8880a4fbe280 [ 82.103314][ T9799] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000f7f27b40 [ 82.112226][ T9799] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 82.118787][ T9799] CR2: 0000000020000280 CR3: 000000009932f000 CR4: 00000000001406f0 [ 82.126811][ T9799] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.134763][ T9799] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.142753][ T9799] Call Trace: [ 82.146034][ T9799] __nf_tables_abort+0x1e53/0x2a50 [ 82.151130][ T9799] ? nfnl_err_del+0x115/0x170 [ 82.155783][ T9799] nf_tables_abort+0x17/0x30 [ 82.160360][ T9799] nfnetlink_rcv_batch+0xa5d/0x17a0 [ 82.165548][ T9799] ? nf_tables_delobj+0x8f0/0x8f0 [ 82.170553][ T9799] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 82.176353][ T9799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.182573][ T9799] ? apparmor_capable+0x497/0x900 [ 82.188368][ T9799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.194585][ T9799] ? __nla_validate_parse+0x2d0/0x1ee0 [ 82.200042][ T9799] ? cap_capable+0x205/0x270 [ 82.204611][ T9799] ? nla_memcpy+0xb0/0xb0 [ 82.208917][ T9799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.215144][ T9799] ? ns_capable_common+0x93/0x100 [ 82.220158][ T9799] ? __nla_parse+0x43/0x60 [ 82.224564][ T9799] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 82.231304][ T9799] nfnetlink_rcv+0x3e7/0x460 [ 82.235872][ T9799] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 82.241306][ T9799] ? netlink_deliver_tap+0x24a/0xbe0 [ 82.246582][ T9799] ? __kasan_check_write+0x14/0x20 [ 82.251684][ T9799] netlink_unicast+0x58c/0x7d0 [ 82.256436][ T9799] ? netlink_attachskb+0x870/0x870 [ 82.261537][ T9799] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 82.267235][ T9799] ? __check_object_size+0x3d/0x437 [ 82.273205][ T9799] netlink_sendmsg+0x91c/0xea0 [ 82.278134][ T9799] ? netlink_unicast+0x7d0/0x7d0 [ 82.283669][ T9799] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 82.289208][ T9799] ? apparmor_socket_sendmsg+0x2a/0x30 [ 82.294658][ T9799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.300881][ T9799] ? security_socket_sendmsg+0x8d/0xc0 [ 82.306316][ T9799] ? netlink_unicast+0x7d0/0x7d0 [ 82.311240][ T9799] sock_sendmsg+0xd7/0x130 [ 82.315633][ T9799] ____sys_sendmsg+0x753/0x880 [ 82.320373][ T9799] ? kernel_sendmsg+0x50/0x50 [ 82.326077][ T9799] ? find_held_lock+0x35/0x130 [ 82.330819][ T9799] ___sys_sendmsg+0x100/0x170 [ 82.335492][ T9799] ? sendmsg_copy_msghdr+0x70/0x70 [ 82.340580][ T9799] ? __kasan_check_read+0x11/0x20 [ 82.345581][ T9799] ? __fget+0x37f/0x550 [ 82.349715][ T9799] ? ksys_dup3+0x3e0/0x3e0 [ 82.354110][ T9799] ? __do_page_fault+0x56a/0xd80 [ 82.359025][ T9799] ? __fget_light+0x1a9/0x230 [ 82.363678][ T9799] ? __fdget+0x1b/0x20 [ 82.367726][ T9799] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 82.373969][ T9799] __sys_sendmsg+0x105/0x1d0 [ 82.378557][ T9799] ? __sys_sendmsg_sock+0xc0/0xc0 [ 82.383564][ T9799] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 82.389001][ T9799] ? do_fast_syscall_32+0xd1/0xe16 [ 82.394110][ T9799] ? entry_SYSENTER_compat+0x70/0x7f [ 82.399370][ T9799] ? do_fast_syscall_32+0xd1/0xe16 [ 82.404474][ T9799] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 82.409911][ T9799] do_fast_syscall_32+0x27b/0xe16 [ 82.414913][ T9799] entry_SYSENTER_compat+0x70/0x7f [ 82.420004][ T9799] RIP: 0023:0xf7f2b9a9 [ 82.424049][ T9799] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 82.443625][ T9799] RSP: 002b:00000000f7f2712c EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 82.452025][ T9799] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000280 [ 82.459972][ T9799] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000080fd000 [ 82.467928][ T9799] RBP: 00000000080fd00c R08: 0000000000000000 R09: 0000000000000000 [ 82.475875][ T9799] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 82.483832][ T9799] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 82.491784][ T9799] Modules linked in: [ 82.496760][ T9799] ---[ end trace 17b09d4dfd5844f7 ]--- [ 82.502349][ T9799] RIP: 0010:__list_del_entry_valid.cold+0x37/0x4f [ 82.508750][ T9799] Code: be fd 0f 0b 4c 89 ea 4c 89 f6 48 c7 c7 60 69 71 88 e8 e0 de be fd 0f 0b 4c 89 e2 4c 89 f6 48 c7 c7 c0 69 71 88 e8 cc de be fd <0f> 0b 4c 89 f6 48 c7 c7 80 6a 71 88 e8 bb de be fd 0f 0b cc cc cc [ 82.528429][ T9799] RSP: 0018:ffffc900022a7468 EFLAGS: 00010286 [ 82.534507][ T9799] RAX: 000000000000004e RBX: ffff888098c85400 RCX: 0000000000000000 [ 82.542511][ T9799] RDX: 0000000000000000 RSI: ffffffff815e5326 RDI: fffff52000454e7f [ 82.550497][ T9799] RBP: ffffc900022a7480 R08: 000000000000004e R09: ffffed1015d06621 [ 82.558453][ T9799] R10: ffffed1015d06620 R11: ffff8880ae833107 R12: dead000000000122 [ 82.566459][ T9799] R13: ffffffff8a4c74b0 R14: ffff888098c85400 R15: ffff8880a4fbe280 [ 82.574447][ T9799] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000f7f27b40 [ 82.583477][ T9799] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 82.590077][ T9799] CR2: 00000000f7f06db0 CR3: 000000009932f000 CR4: 00000000001406f0 [ 82.598033][ T9799] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.606029][ T9799] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.614012][ T9799] Kernel panic - not syncing: Fatal exception [ 82.621409][ T9799] Kernel Offset: disabled [ 82.625733][ T9799] Rebooting in 86400 seconds..