[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.851709][ T27] audit: type=1800 audit(1578426519.756:25): pid=9602 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.872545][ T27] audit: type=1800 audit(1578426519.756:26): pid=9602 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.894438][ T27] audit: type=1800 audit(1578426519.756:27): pid=9602 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 '10.128.0.212' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.969552][ T9756] kasan: CONFIG_KASAN_INLINE enabled [ 76.975187][ T9756] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 76.983307][ T9756] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 76.990251][ T9756] CPU: 0 PID: 9756 Comm: syz-executor149 Not tainted 5.5.0-rc4-syzkaller #0 [ 76.998938][ T9756] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.008992][ T9756] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 77.015079][ T9756] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 71 0c 00 00 4c 89 e2 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c [ 77.034680][ T9756] RSP: 0018:ffffc90001ce7150 EFLAGS: 00010246 [ 77.040736][ T9756] RAX: dffffc0000000000 RBX: ffffc90001ce7320 RCX: 0000000000000000 [ 77.048700][ T9756] RDX: 0000000000000000 RSI: ffffffff86821788 RDI: ffff8880a072f470 [ 77.056654][ T9756] RBP: ffffc90001ce72b8 R08: 0000000000000000 R09: 0000000000000000 [ 77.064623][ T9756] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.072588][ T9756] R13: 0000000002000000 R14: ffffc90001ce7220 R15: ffff8880a82e8d00 [ 77.080547][ T9756] FS: 0000000002509880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.089464][ T9756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.096025][ T9756] CR2: 0000000020000446 CR3: 0000000093f24000 CR4: 00000000001406f0 [ 77.103991][ T9756] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.111945][ T9756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.119908][ T9756] Call Trace: [ 77.123182][ T9756] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 77.129059][ T9756] ? hash_ipportnet6_test+0x10c0/0x10c0 [ 77.134586][ T9756] ? hash_ipportnet6_uadt+0xeb0/0xeb0 [ 77.139951][ T9756] ? nla_memcpy+0xb0/0xb0 [ 77.144264][ T9756] ? ip_set_utest+0x4aa/0x890 [ 77.148923][ T9756] ? __kasan_check_read+0x11/0x20 [ 77.153930][ T9756] ip_set_utest+0x55b/0x890 [ 77.158414][ T9756] ? ip_set_put_byindex+0x490/0x490 [ 77.163606][ T9756] ? __mutex_lock+0x458/0x13c0 [ 77.168359][ T9756] ? ip_set_put_byindex+0x490/0x490 [ 77.173540][ T9756] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 77.178459][ T9756] ? nfnetlink_bind+0x2c0/0x2c0 [ 77.183303][ T9756] ? __kasan_check_read+0x11/0x20 [ 77.188305][ T9756] ? __lock_acquire+0x8a0/0x4a00 [ 77.193218][ T9756] ? save_stack+0x5c/0x90 [ 77.197532][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.203754][ T9756] ? apparmor_capable+0x497/0x900 [ 77.208776][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.215008][ T9756] ? __kasan_check_read+0x11/0x20 [ 77.220021][ T9756] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 77.225476][ T9756] netlink_rcv_skb+0x177/0x450 [ 77.230233][ T9756] ? nfnetlink_bind+0x2c0/0x2c0 [ 77.235064][ T9756] ? netlink_ack+0xb50/0xb50 [ 77.239633][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.245867][ T9756] ? ns_capable_common+0x93/0x100 [ 77.250883][ T9756] ? ns_capable+0x20/0x30 [ 77.255253][ T9756] ? __netlink_ns_capable+0x104/0x140 [ 77.260621][ T9756] nfnetlink_rcv+0x1ba/0x460 [ 77.265194][ T9756] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 77.270631][ T9756] ? netlink_deliver_tap+0x24a/0xbe0 [ 77.275940][ T9756] ? __kasan_check_write+0x14/0x20 [ 77.281030][ T9756] netlink_unicast+0x58c/0x7d0 [ 77.285777][ T9756] ? netlink_attachskb+0x870/0x870 [ 77.290872][ T9756] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 77.296596][ T9756] ? __check_object_size+0x3d/0x437 [ 77.301776][ T9756] netlink_sendmsg+0x91c/0xea0 [ 77.306581][ T9756] ? netlink_unicast+0x7d0/0x7d0 [ 77.311542][ T9756] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 77.317109][ T9756] ? apparmor_socket_sendmsg+0x2a/0x30 [ 77.322549][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.328778][ T9756] ? security_socket_sendmsg+0x8d/0xc0 [ 77.334218][ T9756] ? netlink_unicast+0x7d0/0x7d0 [ 77.339203][ T9756] sock_sendmsg+0xd7/0x130 [ 77.343630][ T9756] ____sys_sendmsg+0x753/0x880 [ 77.348447][ T9756] ? kernel_sendmsg+0x50/0x50 [ 77.353170][ T9756] ? lockdep_init_map+0x1be/0x6d0 [ 77.358242][ T9756] ___sys_sendmsg+0x100/0x170 [ 77.362959][ T9756] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.368060][ T9756] ? __kasan_check_read+0x11/0x20 [ 77.373190][ T9756] ? __lock_acquire+0x8a0/0x4a00 [ 77.378116][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.384346][ T9756] ? __this_cpu_preempt_check+0x35/0x190 [ 77.389987][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.396293][ T9756] ? percpu_counter_add_batch+0x13c/0x190 [ 77.402061][ T9756] ? __fd_install+0x1bc/0x640 [ 77.406762][ T9756] ? find_held_lock+0x35/0x130 [ 77.411560][ T9756] ? __fd_install+0x1bc/0x640 [ 77.416257][ T9756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.422520][ T9756] ? __fget_light+0x1a9/0x230 [ 77.427294][ T9756] ? __fdget+0x1b/0x20 [ 77.431411][ T9756] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.437727][ T9756] __sys_sendmsg+0x105/0x1d0 [ 77.442322][ T9756] ? __sys_sendmsg_sock+0xc0/0xc0 [ 77.447351][ T9756] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.452918][ T9756] ? do_syscall_64+0x26/0x790 [ 77.457637][ T9756] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.463745][ T9756] ? do_syscall_64+0x26/0x790 [ 77.468434][ T9756] __x64_sys_sendmsg+0x78/0xb0 [ 77.473245][ T9756] do_syscall_64+0xfa/0x790 [ 77.477736][ T9756] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.483625][ T9756] RIP: 0033:0x440839 [ 77.487557][ T9756] 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 [ 77.507153][ T9756] RSP: 002b:00007ffd67991758 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.515591][ T9756] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440839 [ 77.523579][ T9756] RDX: 0000000000000002 RSI: 0000000020000140 RDI: 0000000000000004 [ 77.531532][ T9756] RBP: 00000000006ca018 R08: 0000000000000008 R09: 00000000004002c8 [ 77.539484][ T9756] R10: 000000000000204e R11: 0000000000000246 R12: 00000000004020c0 [ 77.547442][ T9756] R13: 0000000000402150 R14: 0000000000000000 R15: 0000000000000000 [ 77.555413][ T9756] Modules linked in: [ 77.559392][ T9756] ---[ end trace 8b56eb016996d100 ]--- [ 77.564914][ T9756] RIP: 0010:hash_ipportnet4_uadt+0x20b/0x13e0 [ 77.570965][ T9756] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 71 0c 00 00 4c 89 e2 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c [ 77.590672][ T9756] RSP: 0018:ffffc90001ce7150 EFLAGS: 00010246 [ 77.596784][ T9756] RAX: dffffc0000000000 RBX: ffffc90001ce7320 RCX: 0000000000000000 [ 77.604789][ T9756] RDX: 0000000000000000 RSI: ffffffff86821788 RDI: ffff8880a072f470 [ 77.612780][ T9756] RBP: ffffc90001ce72b8 R08: 0000000000000000 R09: 0000000000000000 [ 77.620739][ T9756] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.628730][ T9756] R13: 0000000002000000 R14: ffffc90001ce7220 R15: ffff8880a82e8d00 [ 77.636716][ T9756] FS: 0000000002509880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.645675][ T9756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.652277][ T9756] CR2: 0000000020000446 CR3: 0000000093f24000 CR4: 00000000001406f0 [ 77.660244][ T9756] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.668240][ T9756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.676244][ T9756] Kernel panic - not syncing: Fatal exception in interrupt [ 77.684797][ T9756] Kernel Offset: disabled [ 77.689142][ T9756] Rebooting in 86400 seconds..