[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 65.937239][ T27] audit: type=1800 audit(1577382309.524:25): pid=9236 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.970638][ T27] audit: type=1800 audit(1577382309.524:26): pid=9236 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.010399][ T27] audit: type=1800 audit(1577382309.524:27): pid=9236 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.90' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.712045][ T9389] kasan: CONFIG_KASAN_INLINE enabled [ 74.717832][ T9389] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 74.726068][ T9389] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 74.733008][ T9389] CPU: 1 PID: 9389 Comm: syz-executor394 Not tainted 5.5.0-rc2-syzkaller #0 [ 74.741670][ T9389] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.751733][ T9389] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 74.758134][ T9389] Code: d9 f2 0d fb 45 84 f6 0f 84 08 07 00 00 e8 8b f1 0d 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 29 fa fa [ 74.777742][ T9389] RSP: 0018:ffffc90002487788 EFLAGS: 00010202 [ 74.783974][ T9389] RAX: dffffc0000000000 RBX: ffffc90002487ae8 RCX: ffffffff8667437e [ 74.791964][ T9389] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 74.799926][ T9389] RBP: ffffc90002487848 R08: ffff88809750c3c0 R09: ffffed1015d2703d [ 74.807983][ T9389] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 74.815960][ T9389] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90002487820 [ 74.823938][ T9389] FS: 00000000014db880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 74.832848][ T9389] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.839411][ T9389] CR2: 0000000020000820 CR3: 0000000092a34000 CR4: 00000000001406e0 [ 74.847365][ T9389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.855322][ T9389] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.863293][ T9389] Call Trace: [ 74.866585][ T9389] ? xt_rateest_lookup+0x270/0x270 [ 74.871678][ T9389] ? __kasan_check_write+0x14/0x20 [ 74.876780][ T9389] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 74.882319][ T9389] ? xt_rateest_lookup+0x270/0x270 [ 74.887411][ T9389] xt_check_target+0x283/0x690 [ 74.892177][ T9389] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 74.897962][ T9389] ? mutex_unlock+0xd/0x10 [ 74.902387][ T9389] ? xt_find_target+0x73/0x280 [ 74.907132][ T9389] ? xt_find_target+0x73/0x280 [ 74.911897][ T9389] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 74.918118][ T9389] translate_table+0x1005/0x1d70 [ 74.923045][ T9389] ? arpt_alloc_initial_table+0x690/0x690 [ 74.928744][ T9389] ? lock_downgrade+0x920/0x920 [ 74.933605][ T9389] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 74.939948][ T9389] ? _copy_from_user+0x12c/0x1a0 [ 74.945010][ T9389] do_arpt_set_ctl+0x310/0x640 [ 74.949777][ T9389] ? __do_replace+0xa80/0xa80 [ 74.954470][ T9389] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 74.960049][ T9389] ? ___might_sleep+0x163/0x2c0 [ 74.964884][ T9389] ? wait_for_completion+0x440/0x440 [ 74.970164][ T9389] ? mutex_unlock+0xd/0x10 [ 74.974581][ T9389] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 74.980544][ T9389] nf_setsockopt+0x77/0xd0 [ 74.984941][ T9389] ip_setsockopt+0xdf/0x100 [ 74.989435][ T9389] udp_setsockopt+0x68/0xb0 [ 74.993930][ T9389] sock_common_setsockopt+0x94/0xd0 [ 74.999110][ T9389] __sys_setsockopt+0x261/0x4c0 [ 75.003955][ T9389] ? sock_create_kern+0x50/0x50 [ 75.008799][ T9389] ? down_read_non_owner+0x490/0x490 [ 75.014069][ T9389] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 75.020292][ T9389] ? handle_mm_fault+0x4ab/0xa50 [ 75.025218][ T9389] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 75.030867][ T9389] ? do_syscall_64+0x26/0x790 [ 75.035524][ T9389] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.041579][ T9389] ? do_syscall_64+0x26/0x790 [ 75.046238][ T9389] __x64_sys_setsockopt+0xbe/0x150 [ 75.051328][ T9389] do_syscall_64+0xfa/0x790 [ 75.055811][ T9389] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.061692][ T9389] RIP: 0033:0x4414d9 [ 75.065567][ T9389] 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 [ 75.085154][ T9389] RSP: 002b:00007ffc59017268 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 75.093559][ T9389] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004414d9 [ 75.101525][ T9389] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 75.109486][ T9389] RBP: 00000000006cb018 R08: 0000000000000530 R09: 00000000004002c8 [ 75.117436][ T9389] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000402d60 [ 75.125387][ T9389] R13: 0000000000402df0 R14: 0000000000000000 R15: 0000000000000000 [ 75.133357][ T9389] Modules linked in: [ 75.137354][ T9389] ---[ end trace ead5861ffa50de9f ]--- [ 75.142868][ T9389] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 75.149608][ T9389] Code: d9 f2 0d fb 45 84 f6 0f 84 08 07 00 00 e8 8b f1 0d 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 29 fa fa [ 75.169255][ T9389] RSP: 0018:ffffc90002487788 EFLAGS: 00010202 [ 75.175350][ T9389] RAX: dffffc0000000000 RBX: ffffc90002487ae8 RCX: ffffffff8667437e [ 75.183348][ T9389] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 75.191389][ T9389] RBP: ffffc90002487848 R08: ffff88809750c3c0 R09: ffffed1015d2703d [ 75.199365][ T9389] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 75.207515][ T9389] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90002487820 [ 75.215537][ T9389] FS: 00000000014db880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 75.224501][ T9389] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.231103][ T9389] CR2: 0000000020000820 CR3: 0000000092a34000 CR4: 00000000001406e0 [ 75.239071][ T9389] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.247065][ T9389] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.255130][ T9389] Kernel panic - not syncing: Fatal exception [ 75.262809][ T9389] Kernel Offset: disabled [ 75.267166][ T9389] Rebooting in 86400 seconds..