[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 97.912040][ T27] audit: type=1800 audit(1579436631.742:25): pid=9498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 97.937929][ T27] audit: type=1800 audit(1579436631.752:26): pid=9498 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 98.008117][ T27] audit: type=1800 audit(1579436631.752:27): pid=9498 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 '10.128.0.142' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 106.050795][ T9652] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN [ 106.062854][ T9652] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] [ 106.071286][ T9652] CPU: 0 PID: 9652 Comm: syz-executor522 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 [ 106.081447][ T9652] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 106.091946][ T9652] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 106.097993][ T9652] Code: e8 af 9e f6 fa 41 83 fd 05 0f 87 62 05 00 00 e8 20 9d f6 fa 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 [ 106.117671][ T9652] RSP: 0018:ffffc90002dd7100 EFLAGS: 00010206 [ 106.123803][ T9652] RAX: dffffc0000000000 RBX: ffffc90002dd72b0 RCX: ffffffff867efaa1 [ 106.132024][ T9652] RDX: 0000000000000003 RSI: ffffffff867efab0 RDI: 0000000000000018 [ 106.139986][ T9652] RBP: ffffc90002dd71f0 R08: ffff8880a87581c0 R09: 0000000000000000 [ 106.147946][ T9652] R10: fffff520005bae2f R11: ffffc90002dd717f R12: 0000000000000000 [ 106.155903][ T9652] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90002dd71c8 [ 106.163949][ T9652] FS: 00000000012c7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 106.172873][ T9652] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.179439][ T9652] CR2: 0000000020000280 CR3: 0000000094e3e000 CR4: 00000000001406f0 [ 106.187495][ T9652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.195546][ T9652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.203495][ T9652] Call Trace: [ 106.206772][ T9652] ? nf_tables_newset+0x2620/0x2620 [ 106.211949][ T9652] ? nft_trans_rule_add+0x2d0/0x2d0 [ 106.217140][ T9652] ? __kasan_check_read+0x11/0x20 [ 106.222174][ T9652] nf_tables_addchain.constprop.0+0x1c1/0x1520 [ 106.228335][ T9652] ? nft_chain_parse_hook+0xa10/0xa10 [ 106.233690][ T9652] ? nla_strcmp+0xe3/0x120 [ 106.238105][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.244414][ T9652] ? nft_table_lookup+0x154/0x1b0 [ 106.249509][ T9652] nf_tables_newchain+0x1033/0x1820 [ 106.254686][ T9652] ? __mutex_lock+0x458/0x13c0 [ 106.259433][ T9652] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 106.266525][ T9652] ? nla_memcpy+0xb0/0xb0 [ 106.270850][ T9652] ? __nla_parse+0x43/0x60 [ 106.275250][ T9652] nfnetlink_rcv_batch+0x8c8/0x1780 [ 106.280455][ T9652] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 106.286865][ T9652] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 106.292751][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.298969][ T9652] ? apparmor_capable+0x4df/0x910 [ 106.303992][ T9652] ? __nla_validate_parse+0x2d0/0x1ee0 [ 106.309445][ T9652] ? cap_capable+0x205/0x270 [ 106.314035][ T9652] ? nla_memcpy+0xb0/0xb0 [ 106.318355][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.324585][ T9652] ? ns_capable_common+0x93/0x100 [ 106.329601][ T9652] ? __nla_parse+0x43/0x60 [ 106.334002][ T9652] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 106.339714][ T9652] nfnetlink_rcv+0x3e7/0x460 [ 106.344297][ T9652] ? nfnetlink_rcv_batch+0x1780/0x1780 [ 106.349822][ T9652] ? netlink_deliver_tap+0x248/0xbf0 [ 106.355090][ T9652] ? __kasan_check_write+0x14/0x20 [ 106.360180][ T9652] netlink_unicast+0x59e/0x7e0 [ 106.364929][ T9652] ? netlink_attachskb+0x870/0x870 [ 106.370036][ T9652] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 106.375739][ T9652] ? __check_object_size+0x3d/0x437 [ 106.380924][ T9652] netlink_sendmsg+0x91c/0xea0 [ 106.385739][ T9652] ? netlink_unicast+0x7e0/0x7e0 [ 106.390719][ T9652] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 106.396266][ T9652] ? apparmor_socket_sendmsg+0x2a/0x30 [ 106.401711][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.408299][ T9652] ? security_socket_sendmsg+0x8d/0xc0 [ 106.413739][ T9652] ? netlink_unicast+0x7e0/0x7e0 [ 106.418770][ T9652] sock_sendmsg+0xd7/0x130 [ 106.423182][ T9652] ____sys_sendmsg+0x753/0x880 [ 106.427939][ T9652] ? kernel_sendmsg+0x50/0x50 [ 106.432604][ T9652] ? lockdep_init_map+0x1be/0x6d0 [ 106.437624][ T9652] ___sys_sendmsg+0x100/0x170 [ 106.442301][ T9652] ? sendmsg_copy_msghdr+0x70/0x70 [ 106.447417][ T9652] ? __kasan_check_read+0x11/0x20 [ 106.452431][ T9652] ? __lock_acquire+0x8a0/0x4a00 [ 106.457351][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.463579][ T9652] ? __this_cpu_preempt_check+0x35/0x190 [ 106.469252][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.475568][ T9652] ? percpu_counter_add_batch+0x13c/0x190 [ 106.481274][ T9652] ? __fd_install+0x1bc/0x640 [ 106.486043][ T9652] ? find_held_lock+0x35/0x130 [ 106.490822][ T9652] ? __fd_install+0x1bc/0x640 [ 106.495488][ T9652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 106.501724][ T9652] ? __fget_light+0x1ad/0x270 [ 106.506381][ T9652] ? __fdget+0x1b/0x20 [ 106.510437][ T9652] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 106.516675][ T9652] __sys_sendmsg+0x105/0x1d0 [ 106.521329][ T9652] ? __sys_sendmsg_sock+0xc0/0xc0 [ 106.526594][ T9652] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 106.532052][ T9652] ? do_syscall_64+0x26/0x790 [ 106.536865][ T9652] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 106.542942][ T9652] ? do_syscall_64+0x26/0x790 [ 106.547628][ T9652] __x64_sys_sendmsg+0x78/0xb0 [ 106.552378][ T9652] do_syscall_64+0xfa/0x790 [ 106.557068][ T9652] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 106.562953][ T9652] RIP: 0033:0x440559 [ 106.566842][ T9652] 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 [ 106.586452][ T9652] RSP: 002b:00007fffc84088b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 106.594938][ T9652] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 106.602895][ T9652] RDX: 0000000004000000 RSI: 000000002000d400 RDI: 0000000000000004 [ 106.610859][ T9652] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 106.618808][ T9652] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401de0 [ 106.626754][ T9652] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 106.634719][ T9652] Modules linked in: [ 106.639003][ T9652] ---[ end trace f45585b2db85db4d ]--- [ 106.644588][ T9652] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 106.650599][ T9652] Code: e8 af 9e f6 fa 41 83 fd 05 0f 87 62 05 00 00 e8 20 9d f6 fa 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 [ 106.670317][ T9652] RSP: 0018:ffffc90002dd7100 EFLAGS: 00010206 [ 106.676427][ T9652] RAX: dffffc0000000000 RBX: ffffc90002dd72b0 RCX: ffffffff867efaa1 [ 106.684395][ T9652] RDX: 0000000000000003 RSI: ffffffff867efab0 RDI: 0000000000000018 [ 106.692408][ T9652] RBP: ffffc90002dd71f0 R08: ffff8880a87581c0 R09: 0000000000000000 [ 106.700420][ T9652] R10: fffff520005bae2f R11: ffffc90002dd717f R12: 0000000000000000 [ 106.708452][ T9652] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90002dd71c8 [ 106.716623][ T9652] FS: 00000000012c7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 106.725613][ T9652] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.732279][ T9652] CR2: 0000000020000280 CR3: 0000000094e3e000 CR4: 00000000001406f0 [ 106.740290][ T9652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.748277][ T9652] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.756302][ T9652] Kernel panic - not syncing: Fatal exception [ 106.763885][ T9652] Kernel Offset: disabled [ 106.768218][ T9652] Rebooting in 86400 seconds..