[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.478369][ T27] audit: type=1800 audit(1579160584.295:25): pid=9408 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.498165][ T27] audit: type=1800 audit(1579160584.295:26): pid=9408 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.524170][ T27] audit: type=1800 audit(1579160584.305:27): pid=9408 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 '10.128.15.194' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 98.076144][ T9562] kasan: CONFIG_KASAN_INLINE enabled [ 98.081599][ T9562] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 98.089965][ T9562] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 98.096902][ T9562] CPU: 0 PID: 9562 Comm: syz-executor516 Not tainted 5.5.0-rc6-syzkaller #0 [ 98.105574][ T9562] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 98.115640][ T9562] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 98.121002][ T9562] Code: 15 76 04 fb 45 84 f6 0f 84 68 02 00 00 e8 c7 74 04 fb 49 8d bd 68 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 68 13 00 00 e8 b9 ad f0 fa [ 98.140594][ T9562] RSP: 0018:ffffc900020a7940 EFLAGS: 00010202 [ 98.146644][ T9562] RAX: dffffc0000000000 RBX: ffff8880a46d6c00 RCX: ffffffff86708332 [ 98.154602][ T9562] RDX: 000000000000026d RSI: ffffffff867080b9 RDI: 0000000000001368 [ 98.162565][ T9562] RBP: ffffc900020a7970 R08: ffff88808ee58280 R09: ffffed1015d0703d [ 98.170524][ T9562] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 98.178483][ T9562] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86708470 [ 98.186574][ T9562] FS: 00000000010b3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.195600][ T9562] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.202171][ T9562] CR2: 00000000200008e0 CR3: 00000000a9212000 CR4: 00000000001406f0 [ 98.210172][ T9562] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.218372][ T9562] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.226356][ T9562] Call Trace: [ 98.229672][ T9562] ? xt_rateest_put+0x440/0x440 [ 98.234617][ T9562] xt_rateest_tg_destroy+0x72/0xa0 [ 98.239825][ T9562] ? xt_percpu_counter_free+0x8f/0xd0 [ 98.245195][ T9562] translate_table+0x11f4/0x1d80 [ 98.250154][ T9562] ? arpt_alloc_initial_table+0x690/0x690 [ 98.255856][ T9562] ? lock_downgrade+0x920/0x920 [ 98.260716][ T9562] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 98.266980][ T9562] ? _copy_from_user+0x12c/0x1a0 [ 98.271931][ T9562] do_arpt_set_ctl+0x317/0x650 [ 98.276695][ T9562] ? __do_replace+0xa80/0xa80 [ 98.281456][ T9562] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 98.288022][ T9562] ? ___might_sleep+0x163/0x2c0 [ 98.292873][ T9562] ? wait_for_completion+0x440/0x440 [ 98.298205][ T9562] ? mutex_unlock+0xd/0x10 [ 98.302608][ T9562] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 98.308589][ T9562] nf_setsockopt+0x77/0xd0 [ 98.313007][ T9562] ip_setsockopt+0xdf/0x100 [ 98.317623][ T9562] udp_setsockopt+0x68/0xb0 [ 98.322139][ T9562] sock_common_setsockopt+0x94/0xd0 [ 98.327473][ T9562] __sys_setsockopt+0x261/0x4c0 [ 98.332320][ T9562] ? sock_create_kern+0x50/0x50 [ 98.337184][ T9562] ? down_read_non_owner+0x490/0x490 [ 98.342475][ T9562] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 98.348718][ T9562] ? handle_mm_fault+0x4ab/0xa50 [ 98.353645][ T9562] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 98.359305][ T9562] ? do_syscall_64+0x26/0x790 [ 98.363976][ T9562] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.370029][ T9562] ? do_syscall_64+0x26/0x790 [ 98.374726][ T9562] __x64_sys_setsockopt+0xbe/0x150 [ 98.379827][ T9562] do_syscall_64+0xfa/0x790 [ 98.384504][ T9562] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.390440][ T9562] RIP: 0033:0x4419a9 [ 98.394338][ T9562] 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 [ 98.413930][ T9562] RSP: 002b:00007ffc44918928 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 98.422576][ T9562] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004419a9 [ 98.430720][ T9562] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 98.438756][ T9562] RBP: 00000000006cc018 R08: 0000000000000430 R09: 00000000004002c8 [ 98.446985][ T9562] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000403230 [ 98.455231][ T9562] R13: 00000000004032c0 R14: 0000000000000000 R15: 0000000000000000 [ 98.463431][ T9562] Modules linked in: [ 98.467975][ T9562] ---[ end trace 0fc6268a29037695 ]--- [ 98.473498][ T9562] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 98.478863][ T9562] Code: 15 76 04 fb 45 84 f6 0f 84 68 02 00 00 e8 c7 74 04 fb 49 8d bd 68 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 68 13 00 00 e8 b9 ad f0 fa [ 98.498531][ T9562] RSP: 0018:ffffc900020a7940 EFLAGS: 00010202 [ 98.504617][ T9562] RAX: dffffc0000000000 RBX: ffff8880a46d6c00 RCX: ffffffff86708332 [ 98.512584][ T9562] RDX: 000000000000026d RSI: ffffffff867080b9 RDI: 0000000000001368 [ 98.520611][ T9562] RBP: ffffc900020a7970 R08: ffff88808ee58280 R09: ffffed1015d0703d [ 98.528742][ T9562] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 98.536750][ T9562] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86708470 [ 98.544850][ T9562] FS: 00000000010b3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.553921][ T9562] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.560604][ T9562] CR2: 00000000200008e0 CR3: 00000000a9212000 CR4: 00000000001406f0 [ 98.568689][ T9562] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.576805][ T9562] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.585089][ T9562] Kernel panic - not syncing: Fatal exception [ 98.592701][ T9562] Kernel Offset: disabled [ 98.597042][ T9562] Rebooting in 86400 seconds..