[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.615355][ T28] audit: type=1800 audit(1578461650.654:25): pid=9561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 75.640022][ T28] audit: type=1800 audit(1578461650.654:26): pid=9561 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 75.690625][ T28] audit: type=1800 audit(1578461650.654:27): pid=9561 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 '10.128.1.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 86.432910][ T9713] kasan: CONFIG_KASAN_INLINE enabled [ 86.438455][ T9713] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 86.448600][ T9713] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 86.455652][ T9713] CPU: 1 PID: 9713 Comm: syz-executor012 Not tainted 5.5.0-rc5-syzkaller #0 [ 86.464346][ T9713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.474400][ T9713] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 86.480121][ T9713] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e8 09 00 00 48 89 da 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ad [ 86.499701][ T9713] RSP: 0018:ffffc90001d67180 EFLAGS: 00010246 [ 86.505774][ T9713] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 86.513737][ T9713] RDX: 0000000000000000 RSI: ffffffff868394cc RDI: ffff88809afd9464 [ 86.521698][ T9713] RBP: ffffc90001d672b8 R08: 0000000000000000 R09: 0000000000000000 [ 86.529656][ T9713] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffffc90001d67320 [ 86.537604][ T9713] R13: 00000000d3650000 R14: ffffc90001d67200 R15: ffff8880a7fb0b00 [ 86.546174][ T9713] FS: 00000000006dd880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 86.555115][ T9713] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.561692][ T9713] CR2: 0000000020000f86 CR3: 00000000a8cc9000 CR4: 00000000001406e0 [ 86.569711][ T9713] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.577676][ T9713] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.585635][ T9713] Call Trace: [ 86.588922][ T9713] ? hash_netnet6_test+0x17d0/0x17d0 [ 86.594197][ T9713] ? hash_netnet6_uadt+0xae0/0xae0 [ 86.599297][ T9713] ? nla_memcpy+0xb0/0xb0 [ 86.603614][ T9713] ? lock_acquire+0x190/0x410 [ 86.608280][ T9713] ? __kasan_check_read+0x11/0x20 [ 86.613284][ T9713] ip_set_utest+0x55b/0x890 [ 86.617783][ T9713] ? ip_set_put_byindex+0x490/0x490 [ 86.622961][ T9713] ? __mutex_lock+0x458/0x13c0 [ 86.627708][ T9713] ? ip_set_put_byindex+0x490/0x490 [ 86.632882][ T9713] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 86.637831][ T9713] ? nfnetlink_bind+0x2c0/0x2c0 [ 86.642680][ T9713] ? __kasan_check_read+0x11/0x20 [ 86.647679][ T9713] ? __lock_acquire+0x8a0/0x4a00 [ 86.652606][ T9713] ? save_stack+0x5c/0x90 [ 86.657099][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.663324][ T9713] ? apparmor_capable+0x497/0x900 [ 86.668339][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.674557][ T9713] ? __kasan_check_read+0x11/0x20 [ 86.679573][ T9713] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 86.685011][ T9713] netlink_rcv_skb+0x177/0x450 [ 86.689752][ T9713] ? nfnetlink_bind+0x2c0/0x2c0 [ 86.694582][ T9713] ? netlink_ack+0xb50/0xb50 [ 86.699161][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.705379][ T9713] ? ns_capable_common+0x93/0x100 [ 86.710390][ T9713] ? ns_capable+0x20/0x30 [ 86.714706][ T9713] ? __netlink_ns_capable+0x104/0x140 [ 86.720075][ T9713] nfnetlink_rcv+0x1ba/0x460 [ 86.724663][ T9713] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 86.730194][ T9713] ? netlink_deliver_tap+0x24a/0xbe0 [ 86.735466][ T9713] ? __kasan_check_write+0x14/0x20 [ 86.740565][ T9713] netlink_unicast+0x58c/0x7d0 [ 86.745317][ T9713] ? netlink_attachskb+0x870/0x870 [ 86.750411][ T9713] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 86.756107][ T9713] ? __check_object_size+0x3d/0x437 [ 86.761383][ T9713] netlink_sendmsg+0x91c/0xea0 [ 86.766125][ T9713] ? netlink_unicast+0x7d0/0x7d0 [ 86.771039][ T9713] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 86.776561][ T9713] ? apparmor_socket_sendmsg+0x2a/0x30 [ 86.782004][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.788223][ T9713] ? security_socket_sendmsg+0x8d/0xc0 [ 86.793680][ T9713] ? netlink_unicast+0x7d0/0x7d0 [ 86.798598][ T9713] sock_sendmsg+0xd7/0x130 [ 86.803008][ T9713] ____sys_sendmsg+0x753/0x880 [ 86.807760][ T9713] ? kernel_sendmsg+0x50/0x50 [ 86.812415][ T9713] ? lockdep_init_map+0x1be/0x6d0 [ 86.817421][ T9713] ___sys_sendmsg+0x100/0x170 [ 86.822089][ T9713] ? sendmsg_copy_msghdr+0x70/0x70 [ 86.827176][ T9713] ? __kasan_check_read+0x11/0x20 [ 86.832177][ T9713] ? __lock_acquire+0x8a0/0x4a00 [ 86.837087][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.843304][ T9713] ? __this_cpu_preempt_check+0x35/0x190 [ 86.848923][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.855142][ T9713] ? percpu_counter_add_batch+0x13c/0x190 [ 86.860968][ T9713] ? __fd_install+0x1bc/0x640 [ 86.865629][ T9713] ? find_held_lock+0x35/0x130 [ 86.870375][ T9713] ? __fd_install+0x1bc/0x640 [ 86.875109][ T9713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.881342][ T9713] ? __fget_light+0x1a9/0x230 [ 86.886043][ T9713] ? __fdget+0x1b/0x20 [ 86.890112][ T9713] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 86.896398][ T9713] __sys_sendmsg+0x105/0x1d0 [ 86.900988][ T9713] ? __sys_sendmsg_sock+0xc0/0xc0 [ 86.906010][ T9713] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 86.911456][ T9713] ? do_syscall_64+0x26/0x790 [ 86.916121][ T9713] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.922243][ T9713] ? do_syscall_64+0x26/0x790 [ 86.927036][ T9713] __x64_sys_sendmsg+0x78/0xb0 [ 86.931789][ T9713] do_syscall_64+0xfa/0x790 [ 86.936272][ T9713] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.942145][ T9713] RIP: 0033:0x440939 [ 86.946017][ T9713] 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 [ 86.965609][ T9713] RSP: 002b:00007ffd199baef8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 86.974094][ T9713] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440939 [ 86.982065][ T9713] RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000004 [ 86.990024][ T9713] RBP: 00000000006cb018 R08: 0000000000000008 R09: 00000000004002c8 [ 86.997976][ T9713] R10: 000000000000000c R11: 0000000000000246 R12: 00000000004021c0 [ 87.005924][ T9713] R13: 0000000000402250 R14: 0000000000000000 R15: 0000000000000000 [ 87.013876][ T9713] Modules linked in: [ 87.017806][ T9713] ---[ end trace 9a567dbaf42c9317 ]--- [ 87.023302][ T9713] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 87.029002][ T9713] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e8 09 00 00 48 89 da 45 8b 6d 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ad [ 87.048625][ T9713] RSP: 0018:ffffc90001d67180 EFLAGS: 00010246 [ 87.054712][ T9713] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 87.062715][ T9713] RDX: 0000000000000000 RSI: ffffffff868394cc RDI: ffff88809afd9464 [ 87.070760][ T9713] RBP: ffffc90001d672b8 R08: 0000000000000000 R09: 0000000000000000 [ 87.078765][ T9713] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffffc90001d67320 [ 87.086889][ T9713] R13: 00000000d3650000 R14: ffffc90001d67200 R15: ffff8880a7fb0b00 [ 87.094874][ T9713] FS: 00000000006dd880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 87.103827][ T9713] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.110428][ T9713] CR2: 0000000020000f86 CR3: 00000000a8cc9000 CR4: 00000000001406e0 [ 87.118479][ T9713] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.126467][ T9713] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.134581][ T9713] Kernel panic - not syncing: Fatal exception in interrupt [ 87.143357][ T9713] Kernel Offset: disabled [ 87.147685][ T9713] Rebooting in 86400 seconds..