[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 78.015132][ T27] audit: type=1800 audit(1578469193.795:25): pid=9288 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 78.036307][ T27] audit: type=1800 audit(1578469193.795:26): pid=9288 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 78.091760][ T27] audit: type=1800 audit(1578469193.795:27): pid=9288 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 '10.128.0.113' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.425676][ T9442] kasan: CONFIG_KASAN_INLINE enabled [ 88.431720][ T9442] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 88.440410][ T9442] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 88.447348][ T9442] CPU: 0 PID: 9442 Comm: syz-executor534 Not tainted 5.5.0-rc5-syzkaller #0 [ 88.456010][ T9442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.466170][ T9442] RIP: 0010:hash_netport4_uadt+0x218/0xff0 [ 88.471959][ T9442] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4d 0a 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 4c [ 88.491541][ T9442] RSP: 0018:ffffc90001e07160 EFLAGS: 00010246 [ 88.497599][ T9442] RAX: dffffc0000000000 RBX: ffffc90001e07320 RCX: 0000000000000000 [ 88.505560][ T9442] RDX: 0000000000000000 RSI: ffffffff86811235 RDI: ffff888097483030 [ 88.513509][ T9442] RBP: ffffc90001e072b8 R08: 0000000000000000 R09: 0000000000000000 [ 88.521462][ T9442] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 88.529553][ T9442] R13: 0000000004000000 R14: ffffc90001e07220 R15: 0000000000000002 [ 88.537513][ T9442] FS: 0000000002029880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.547474][ T9442] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.554581][ T9442] CR2: 0000000020000f86 CR3: 000000009d29d000 CR4: 00000000001406f0 [ 88.562557][ T9442] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.570521][ T9442] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.578685][ T9442] Call Trace: [ 88.582088][ T9442] ? hash_netport6_test+0x1320/0x1320 [ 88.587484][ T9442] ? hash_netport6_kadt+0x740/0x740 [ 88.592784][ T9442] ? nla_memcpy+0xb0/0xb0 [ 88.597463][ T9442] ? ip_set_utest+0x4aa/0x890 [ 88.603716][ T9442] ? __kasan_check_read+0x11/0x20 [ 88.609007][ T9442] ip_set_utest+0x55b/0x890 [ 88.613700][ T9442] ? ip_set_put_byindex+0x490/0x490 [ 88.618899][ T9442] ? __mutex_lock+0x458/0x13c0 [ 88.623819][ T9442] ? ip_set_put_byindex+0x490/0x490 [ 88.629013][ T9442] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 88.633950][ T9442] ? nfnetlink_bind+0x2c0/0x2c0 [ 88.638804][ T9442] ? __kasan_check_read+0x11/0x20 [ 88.643903][ T9442] ? __lock_acquire+0x8a0/0x4a00 [ 88.648999][ T9442] ? save_stack+0x5c/0x90 [ 88.653321][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.659644][ T9442] ? apparmor_capable+0x497/0x900 [ 88.665089][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.671325][ T9442] ? __kasan_check_read+0x11/0x20 [ 88.676344][ T9442] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 88.681820][ T9442] netlink_rcv_skb+0x177/0x450 [ 88.686840][ T9442] ? nfnetlink_bind+0x2c0/0x2c0 [ 88.692477][ T9442] ? netlink_ack+0xb50/0xb50 [ 88.697217][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.703542][ T9442] ? ns_capable_common+0x93/0x100 [ 88.708562][ T9442] ? ns_capable+0x20/0x30 [ 88.712889][ T9442] ? __netlink_ns_capable+0x104/0x140 [ 88.718646][ T9442] nfnetlink_rcv+0x1ba/0x460 [ 88.723655][ T9442] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 88.729227][ T9442] ? netlink_deliver_tap+0x24a/0xbe0 [ 88.734663][ T9442] ? __kasan_check_write+0x14/0x20 [ 88.739869][ T9442] netlink_unicast+0x58c/0x7d0 [ 88.744640][ T9442] ? netlink_attachskb+0x870/0x870 [ 88.749761][ T9442] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 88.755495][ T9442] ? __check_object_size+0x3d/0x437 [ 88.760807][ T9442] netlink_sendmsg+0x91c/0xea0 [ 88.765565][ T9442] ? netlink_unicast+0x7d0/0x7d0 [ 88.770487][ T9442] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 88.777549][ T9442] ? apparmor_socket_sendmsg+0x2a/0x30 [ 88.783083][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.790618][ T9442] ? security_socket_sendmsg+0x8d/0xc0 [ 88.796951][ T9442] ? netlink_unicast+0x7d0/0x7d0 [ 88.802432][ T9442] sock_sendmsg+0xd7/0x130 [ 88.806842][ T9442] ____sys_sendmsg+0x753/0x880 [ 88.811864][ T9442] ? kernel_sendmsg+0x50/0x50 [ 88.816520][ T9442] ? lockdep_init_map+0x1be/0x6d0 [ 88.822093][ T9442] ___sys_sendmsg+0x100/0x170 [ 88.827002][ T9442] ? sendmsg_copy_msghdr+0x70/0x70 [ 88.832548][ T9442] ? __kasan_check_read+0x11/0x20 [ 88.837581][ T9442] ? __lock_acquire+0x8a0/0x4a00 [ 88.844096][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.850477][ T9442] ? __this_cpu_preempt_check+0x35/0x190 [ 88.856113][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.862440][ T9442] ? percpu_counter_add_batch+0x13c/0x190 [ 88.868390][ T9442] ? __fd_install+0x1bc/0x640 [ 88.873183][ T9442] ? find_held_lock+0x35/0x130 [ 88.877950][ T9442] ? __fd_install+0x1bc/0x640 [ 88.882632][ T9442] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.889240][ T9442] ? __fget_light+0x1a9/0x230 [ 88.894036][ T9442] ? __fdget+0x1b/0x20 [ 88.898113][ T9442] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.904350][ T9442] __sys_sendmsg+0x105/0x1d0 [ 88.909033][ T9442] ? __sys_sendmsg_sock+0xc0/0xc0 [ 88.914054][ T9442] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 88.919621][ T9442] ? do_syscall_64+0x26/0x790 [ 88.924881][ T9442] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.930958][ T9442] ? do_syscall_64+0x26/0x790 [ 88.935674][ T9442] __x64_sys_sendmsg+0x78/0xb0 [ 88.940539][ T9442] do_syscall_64+0xfa/0x790 [ 88.945050][ T9442] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.950926][ T9442] RIP: 0033:0x4405e9 [ 88.954810][ T9442] 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 [ 88.974621][ T9442] RSP: 002b:00007ffed104de78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 88.983165][ T9442] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004405e9 [ 88.991135][ T9442] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 [ 88.999110][ T9442] RBP: 00000000006ca018 R08: 0000000000000024 R09: 00000000004002c8 [ 89.007060][ T9442] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000401e70 [ 89.015140][ T9442] R13: 0000000000401f00 R14: 0000000000000000 R15: 0000000000000000 [ 89.024073][ T9442] Modules linked in: [ 89.028019][ T9442] ---[ end trace 0f2c9f8c52df08d8 ]--- [ 89.033569][ T9442] RIP: 0010:hash_netport4_uadt+0x218/0xff0 [ 89.039653][ T9442] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4d 0a 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 4c [ 89.059280][ T9442] RSP: 0018:ffffc90001e07160 EFLAGS: 00010246 [ 89.065357][ T9442] RAX: dffffc0000000000 RBX: ffffc90001e07320 RCX: 0000000000000000 [ 89.073526][ T9442] RDX: 0000000000000000 RSI: ffffffff86811235 RDI: ffff888097483030 [ 89.081689][ T9442] RBP: ffffc90001e072b8 R08: 0000000000000000 R09: 0000000000000000 [ 89.089718][ T9442] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 89.098001][ T9442] R13: 0000000004000000 R14: ffffc90001e07220 R15: 0000000000000002 [ 89.106142][ T9442] FS: 0000000002029880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 89.115390][ T9442] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.121983][ T9442] CR2: 0000000020000f86 CR3: 000000009d29d000 CR4: 00000000001406f0 [ 89.130076][ T9442] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.138094][ T9442] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.146220][ T9442] Kernel panic - not syncing: Fatal exception in interrupt [ 89.155471][ T9442] Kernel Offset: disabled [ 89.159818][ T9442] Rebooting in 86400 seconds..