[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.183492][ T27] audit: type=1800 audit(1578707512.686:25): pid=9524 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.217925][ T27] audit: type=1800 audit(1578707512.686:26): pid=9524 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.252501][ T27] audit: type=1800 audit(1578707512.686:27): pid=9524 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 '10.128.10.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.085726][ T9676] kasan: CONFIG_KASAN_INLINE enabled [ 83.091232][ T9676] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 83.099529][ T9676] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 83.106467][ T9676] CPU: 1 PID: 9676 Comm: syz-executor884 Not tainted 5.5.0-rc5-syzkaller #0 [ 83.115202][ T9676] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.125249][ T9676] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 83.130601][ T9676] 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 [ 83.150196][ T9676] RSP: 0018:ffffc90001d57940 EFLAGS: 00010202 [ 83.156250][ T9676] RAX: dffffc0000000000 RBX: ffff8880a5178900 RCX: ffffffff8673a332 [ 83.164198][ T9676] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 83.172149][ T9676] RBP: ffffc90001d57970 R08: ffff8880a4814280 R09: ffffed1015d2703d [ 83.180116][ T9676] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 83.188066][ T9676] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 83.196025][ T9676] FS: 0000000001deb880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.204942][ T9676] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.211511][ T9676] CR2: 00000000200008e0 CR3: 00000000a6a8a000 CR4: 00000000001406e0 [ 83.219642][ T9676] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.227602][ T9676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.235565][ T9676] Call Trace: [ 83.238839][ T9676] ? xt_rateest_put+0x440/0x440 [ 83.243666][ T9676] xt_rateest_tg_destroy+0x72/0xa0 [ 83.248757][ T9676] ? xt_percpu_counter_free+0x8f/0xd0 [ 83.254106][ T9676] translate_table+0x11f4/0x1d80 [ 83.259037][ T9676] ? arpt_alloc_initial_table+0x690/0x690 [ 83.264741][ T9676] ? lock_downgrade+0x920/0x920 [ 83.269594][ T9676] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.275819][ T9676] ? _copy_from_user+0x12c/0x1a0 [ 83.280738][ T9676] do_arpt_set_ctl+0x317/0x650 [ 83.285482][ T9676] ? __do_replace+0xa80/0xa80 [ 83.290179][ T9676] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 83.295700][ T9676] ? ___might_sleep+0x163/0x2c0 [ 83.300653][ T9676] ? wait_for_completion+0x440/0x440 [ 83.305933][ T9676] ? mutex_unlock+0xd/0x10 [ 83.310343][ T9676] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 83.316310][ T9676] nf_setsockopt+0x77/0xd0 [ 83.320724][ T9676] ip_setsockopt+0xdf/0x100 [ 83.325209][ T9676] udp_setsockopt+0x68/0xb0 [ 83.329694][ T9676] sock_common_setsockopt+0x94/0xd0 [ 83.334867][ T9676] __sys_setsockopt+0x261/0x4c0 [ 83.339697][ T9676] ? sock_create_kern+0x50/0x50 [ 83.344526][ T9676] ? down_read_non_owner+0x490/0x490 [ 83.349809][ T9676] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 83.356027][ T9676] ? handle_mm_fault+0x4ab/0xa50 [ 83.360955][ T9676] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.366389][ T9676] ? do_syscall_64+0x26/0x790 [ 83.371058][ T9676] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.377107][ T9676] ? do_syscall_64+0x26/0x790 [ 83.381777][ T9676] __x64_sys_setsockopt+0xbe/0x150 [ 83.386875][ T9676] do_syscall_64+0xfa/0x790 [ 83.391374][ T9676] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.397242][ T9676] RIP: 0033:0x441699 [ 83.401125][ T9676] 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 [ 83.420715][ T9676] RSP: 002b:00007fff20b60a98 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 83.429111][ T9676] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 83.437078][ T9676] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 83.445147][ T9676] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 83.453109][ T9676] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 83.461064][ T9676] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 83.469021][ T9676] Modules linked in: [ 83.473522][ T9676] ---[ end trace c175195fd46eb591 ]--- [ 83.479029][ T9676] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 83.484391][ T9676] 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 [ 83.504030][ T9676] RSP: 0018:ffffc90001d57940 EFLAGS: 00010202 [ 83.510342][ T9676] RAX: dffffc0000000000 RBX: ffff8880a5178900 RCX: ffffffff8673a332 [ 83.518325][ T9676] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 83.526301][ T9676] RBP: ffffc90001d57970 R08: ffff8880a4814280 R09: ffffed1015d2703d [ 83.534445][ T9676] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 83.542456][ T9676] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 83.550529][ T9676] FS: 0000000001deb880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.559500][ T9676] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.566065][ T9676] CR2: 00000000200008e0 CR3: 00000000a6a8a000 CR4: 00000000001406e0 [ 83.574083][ T9676] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.582082][ T9676] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.590064][ T9676] Kernel panic - not syncing: Fatal exception [ 83.597810][ T9676] Kernel Offset: disabled [ 83.602140][ T9676] Rebooting in 86400 seconds..