[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.731202][ T27] audit: type=1800 audit(1579208518.242:25): pid=9397 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.769668][ T27] audit: type=1800 audit(1579208518.242:26): pid=9397 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.805309][ T27] audit: type=1800 audit(1579208518.252:27): pid=9397 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 '10.128.0.114' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.880379][ T9549] kasan: CONFIG_KASAN_INLINE enabled [ 96.885872][ T9549] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 96.894072][ T9549] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 96.901023][ T9549] CPU: 0 PID: 9549 Comm: syz-executor038 Not tainted 5.5.0-rc6-syzkaller #0 [ 96.909674][ T9549] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.919769][ T9549] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 96.925736][ T9549] Code: e8 5f 27 0e fb 41 83 fd 05 0f 87 62 05 00 00 e8 d0 25 0e fb 49 8d 7c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 05 00 00 44 89 e9 be 01 00 [ 96.945327][ T9549] RSP: 0018:ffffc900020d7100 EFLAGS: 00010206 [ 96.951379][ T9549] RAX: dffffc0000000000 RBX: ffffc900020d72b0 RCX: ffffffff8666cfa1 [ 96.959343][ T9549] RDX: 0000000000000003 RSI: ffffffff8666cfb0 RDI: 0000000000000018 [ 96.968220][ T9549] RBP: ffffc900020d71f0 R08: ffff8880a6e560c0 R09: 0000000000000000 [ 96.976192][ T9549] R10: fffff5200041ae2f R11: ffffc900020d717f R12: 0000000000000000 [ 96.984155][ T9549] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900020d71c8 [ 96.992121][ T9549] FS: 00000000016b6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.001051][ T9549] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.007624][ T9549] CR2: 0000000020000280 CR3: 00000000a728e000 CR4: 00000000001406f0 [ 97.015589][ T9549] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.023718][ T9549] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.032147][ T9549] Call Trace: [ 97.035450][ T9549] ? nf_tables_newset+0x2620/0x2620 [ 97.040653][ T9549] ? nft_trans_rule_add+0x2d0/0x2d0 [ 97.045843][ T9549] ? __kasan_check_read+0x11/0x20 [ 97.050890][ T9549] nf_tables_addchain.constprop.0+0x1c1/0x1520 [ 97.057098][ T9549] ? nft_chain_parse_hook+0xa10/0xa10 [ 97.062457][ T9549] ? nla_strcmp+0xe3/0x120 [ 97.066856][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.073125][ T9549] ? nft_table_lookup+0x154/0x1b0 [ 97.078132][ T9549] nf_tables_newchain+0x1033/0x1820 [ 97.083539][ T9549] ? __mutex_lock+0x458/0x13c0 [ 97.088341][ T9549] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 97.094746][ T9549] ? nla_memcpy+0xb0/0xb0 [ 97.099078][ T9549] ? __nla_parse+0x43/0x60 [ 97.103488][ T9549] nfnetlink_rcv_batch+0xf42/0x17a0 [ 97.108803][ T9549] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 97.115224][ T9549] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 97.121019][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.127237][ T9549] ? apparmor_capable+0x497/0x900 [ 97.132242][ T9549] ? __nla_validate_parse+0x2d0/0x1ee0 [ 97.137685][ T9549] ? cap_capable+0x205/0x270 [ 97.142253][ T9549] ? nla_memcpy+0xb0/0xb0 [ 97.146558][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.152789][ T9549] ? ns_capable_common+0x93/0x100 [ 97.157787][ T9549] ? __nla_parse+0x43/0x60 [ 97.162297][ T9549] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 97.168007][ T9549] nfnetlink_rcv+0x3e7/0x460 [ 97.172585][ T9549] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 97.178042][ T9549] ? netlink_deliver_tap+0x24a/0xbe0 [ 97.183435][ T9549] ? __kasan_check_write+0x14/0x20 [ 97.188535][ T9549] netlink_unicast+0x58c/0x7d0 [ 97.193299][ T9549] ? netlink_attachskb+0x870/0x870 [ 97.198395][ T9549] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.204096][ T9549] ? __check_object_size+0x3d/0x437 [ 97.209273][ T9549] netlink_sendmsg+0x91c/0xea0 [ 97.214019][ T9549] ? netlink_unicast+0x7d0/0x7d0 [ 97.218939][ T9549] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 97.224468][ T9549] ? apparmor_socket_sendmsg+0x2a/0x30 [ 97.229922][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.236148][ T9549] ? security_socket_sendmsg+0x8d/0xc0 [ 97.241604][ T9549] ? netlink_unicast+0x7d0/0x7d0 [ 97.246533][ T9549] sock_sendmsg+0xd7/0x130 [ 97.250947][ T9549] ____sys_sendmsg+0x753/0x880 [ 97.255710][ T9549] ? kernel_sendmsg+0x50/0x50 [ 97.260372][ T9549] ? lockdep_init_map+0x1be/0x6d0 [ 97.265814][ T9549] ___sys_sendmsg+0x100/0x170 [ 97.270478][ T9549] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.275587][ T9549] ? __kasan_check_read+0x11/0x20 [ 97.280586][ T9549] ? __lock_acquire+0x8a0/0x4a00 [ 97.285514][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.291740][ T9549] ? __this_cpu_preempt_check+0x35/0x190 [ 97.297350][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.303575][ T9549] ? percpu_counter_add_batch+0x13c/0x190 [ 97.309271][ T9549] ? __fd_install+0x1bc/0x640 [ 97.313939][ T9549] ? find_held_lock+0x35/0x130 [ 97.318681][ T9549] ? __fd_install+0x1bc/0x640 [ 97.323348][ T9549] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.329563][ T9549] ? __fget_light+0x1a9/0x230 [ 97.334213][ T9549] ? __fdget+0x1b/0x20 [ 97.338256][ T9549] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.344740][ T9549] __sys_sendmsg+0x105/0x1d0 [ 97.349338][ T9549] ? __sys_sendmsg_sock+0xc0/0xc0 [ 97.354397][ T9549] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 97.359841][ T9549] ? do_syscall_64+0x26/0x790 [ 97.364508][ T9549] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.370565][ T9549] ? do_syscall_64+0x26/0x790 [ 97.375259][ T9549] __x64_sys_sendmsg+0x78/0xb0 [ 97.380537][ T9549] do_syscall_64+0xfa/0x790 [ 97.385033][ T9549] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.390907][ T9549] RIP: 0033:0x440559 [ 97.394781][ T9549] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.414392][ T9549] RSP: 002b:00007fff840de358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.422785][ T9549] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 97.430746][ T9549] RDX: 0000000004000000 RSI: 000000002000d400 RDI: 0000000000000004 [ 97.438973][ T9549] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 97.447152][ T9549] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401de0 [ 97.455198][ T9549] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 97.463165][ T9549] Modules linked in: [ 97.467984][ T9549] ---[ end trace 910a75ed3813b5d4 ]--- [ 97.473498][ T9549] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 97.479731][ T9549] Code: e8 5f 27 0e fb 41 83 fd 05 0f 87 62 05 00 00 e8 d0 25 0e fb 49 8d 7c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 05 00 00 44 89 e9 be 01 00 [ 97.500332][ T9549] RSP: 0018:ffffc900020d7100 EFLAGS: 00010206 [ 97.506402][ T9549] RAX: dffffc0000000000 RBX: ffffc900020d72b0 RCX: ffffffff8666cfa1 [ 97.514399][ T9549] RDX: 0000000000000003 RSI: ffffffff8666cfb0 RDI: 0000000000000018 [ 97.522824][ T9549] RBP: ffffc900020d71f0 R08: ffff8880a6e560c0 R09: 0000000000000000 [ 97.530809][ T9549] R10: fffff5200041ae2f R11: ffffc900020d717f R12: 0000000000000000 [ 97.538795][ T9549] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900020d71c8 [ 97.546813][ T9549] FS: 00000000016b6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.555951][ T9549] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.562608][ T9549] CR2: 0000000020000280 CR3: 00000000a728e000 CR4: 00000000001406f0 [ 97.570975][ T9549] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.579017][ T9549] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.587009][ T9549] Kernel panic - not syncing: Fatal exception [ 97.593814][ T9549] Kernel Offset: disabled [ 97.598142][ T9549] Rebooting in 86400 seconds..