[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.246720][ T27] audit: type=1800 audit(1578706979.930:25): pid=9426 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.266936][ T27] audit: type=1800 audit(1578706979.930:26): pid=9426 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.316063][ T27] audit: type=1800 audit(1578706979.930:27): pid=9426 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 '10.128.1.23' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 105.567338][ T9577] kasan: CONFIG_KASAN_INLINE enabled [ 105.572723][ T9577] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 105.580881][ T9577] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 105.587817][ T9577] CPU: 0 PID: 9577 Comm: syz-executor366 Not tainted 5.5.0-rc5-syzkaller #0 [ 105.596464][ T9577] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 105.606508][ T9577] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 105.611863][ T9577] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 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 29 bf ed fa [ 105.631460][ T9577] RSP: 0018:ffffc90001dd7940 EFLAGS: 00010202 [ 105.637507][ T9577] RAX: dffffc0000000000 RBX: ffff8880a657c100 RCX: ffffffff8673a332 [ 105.645460][ T9577] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 105.653408][ T9577] RBP: ffffc90001dd7970 R08: ffff8880931f0000 R09: ffffed1015d0703d [ 105.661361][ T9577] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 105.669558][ T9577] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 105.677522][ T9577] FS: 00000000013e1880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 105.686434][ T9577] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.693002][ T9577] CR2: 00000000200008e0 CR3: 00000000a967d000 CR4: 00000000001406f0 [ 105.701024][ T9577] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 105.708977][ T9577] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 105.716927][ T9577] Call Trace: [ 105.720223][ T9577] ? xt_rateest_put+0x440/0x440 [ 105.725053][ T9577] xt_rateest_tg_destroy+0x72/0xa0 [ 105.730149][ T9577] ? xt_percpu_counter_free+0x8f/0xd0 [ 105.735499][ T9577] translate_table+0x11f4/0x1d80 [ 105.740418][ T9577] ? arpt_alloc_initial_table+0x690/0x690 [ 105.746119][ T9577] ? lock_downgrade+0x920/0x920 [ 105.750951][ T9577] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 105.757175][ T9577] ? _copy_from_user+0x12c/0x1a0 [ 105.762097][ T9577] do_arpt_set_ctl+0x317/0x650 [ 105.766858][ T9577] ? __do_replace+0xa80/0xa80 [ 105.771535][ T9577] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 105.777061][ T9577] ? ___might_sleep+0x163/0x2c0 [ 105.781906][ T9577] ? wait_for_completion+0x440/0x440 [ 105.787191][ T9577] ? mutex_unlock+0xd/0x10 [ 105.791596][ T9577] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 105.797597][ T9577] nf_setsockopt+0x77/0xd0 [ 105.802008][ T9577] ip_setsockopt+0xdf/0x100 [ 105.806497][ T9577] udp_setsockopt+0x68/0xb0 [ 105.810980][ T9577] sock_common_setsockopt+0x94/0xd0 [ 105.816160][ T9577] __sys_setsockopt+0x261/0x4c0 [ 105.821005][ T9577] ? sock_create_kern+0x50/0x50 [ 105.825836][ T9577] ? down_read_non_owner+0x490/0x490 [ 105.831099][ T9577] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 105.837318][ T9577] ? handle_mm_fault+0x4ab/0xa50 [ 105.842233][ T9577] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 105.847672][ T9577] ? do_syscall_64+0x26/0x790 [ 105.852324][ T9577] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.858388][ T9577] ? do_syscall_64+0x26/0x790 [ 105.863049][ T9577] __x64_sys_setsockopt+0xbe/0x150 [ 105.868155][ T9577] do_syscall_64+0xfa/0x790 [ 105.872653][ T9577] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 105.878529][ T9577] RIP: 0033:0x441699 [ 105.882401][ T9577] 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 [ 105.901979][ T9577] RSP: 002b:00007fff51246858 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 105.910369][ T9577] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 105.918319][ T9577] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 105.926369][ T9577] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 105.934316][ T9577] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 105.942262][ T9577] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 105.950211][ T9577] Modules linked in: [ 105.954494][ T9577] ---[ end trace a4b45f6d50028b29 ]--- [ 105.959991][ T9577] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 105.965382][ T9577] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 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 29 bf ed fa [ 105.985011][ T9577] RSP: 0018:ffffc90001dd7940 EFLAGS: 00010202 [ 105.991228][ T9577] RAX: dffffc0000000000 RBX: ffff8880a657c100 RCX: ffffffff8673a332 [ 105.999237][ T9577] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 106.007279][ T9577] RBP: ffffc90001dd7970 R08: ffff8880931f0000 R09: ffffed1015d0703d [ 106.015320][ T9577] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 106.023313][ T9577] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 106.031271][ T9577] FS: 00000000013e1880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 106.040220][ T9577] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 106.046834][ T9577] CR2: 00000000200008e0 CR3: 00000000a967d000 CR4: 00000000001406f0 [ 106.054824][ T9577] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 106.062811][ T9577] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 106.070796][ T9577] Kernel panic - not syncing: Fatal exception [ 106.078168][ T9577] Kernel Offset: disabled [ 106.082520][ T9577] Rebooting in 86400 seconds..