[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 71.366709][ T26] audit: type=1800 audit(1578705312.496:25): pid=9657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 71.401234][ T26] audit: type=1800 audit(1578705312.496:26): pid=9657 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 71.441420][ T26] audit: type=1800 audit(1578705312.496:27): pid=9657 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 '10.128.0.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.646906][ T9809] kasan: CONFIG_KASAN_INLINE enabled [ 81.652436][ T9809] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 81.660490][ T9809] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 81.667620][ T9809] CPU: 1 PID: 9809 Comm: syz-executor875 Not tainted 5.5.0-rc5-syzkaller #0 [ 81.681407][ T9809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.691559][ T9809] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 81.696935][ T9809] 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 [ 81.716532][ T9809] RSP: 0018:ffffc90001d47940 EFLAGS: 00010202 [ 81.722602][ T9809] RAX: dffffc0000000000 RBX: ffff8880a7089200 RCX: ffffffff8673a332 [ 81.730571][ T9809] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 81.738589][ T9809] RBP: ffffc90001d47970 R08: ffff888095adc140 R09: ffffed1015d2703d [ 81.747127][ T9809] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 81.755095][ T9809] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 81.764424][ T9809] FS: 0000000000b38880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 81.773347][ T9809] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.779942][ T9809] CR2: 00000000200008e0 CR3: 0000000097f65000 CR4: 00000000001406e0 [ 81.787903][ T9809] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.796135][ T9809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.804407][ T9809] Call Trace: [ 81.807734][ T9809] ? xt_rateest_put+0x440/0x440 [ 81.813076][ T9809] xt_rateest_tg_destroy+0x72/0xa0 [ 81.819354][ T9809] ? xt_percpu_counter_free+0x8f/0xd0 [ 81.824814][ T9809] translate_table+0x11f4/0x1d80 [ 81.830218][ T9809] ? arpt_alloc_initial_table+0x690/0x690 [ 81.835927][ T9809] ? lock_downgrade+0x920/0x920 [ 81.841049][ T9809] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 81.847548][ T9809] ? _copy_from_user+0x12c/0x1a0 [ 81.853570][ T9809] do_arpt_set_ctl+0x317/0x650 [ 81.858331][ T9809] ? __do_replace+0xa80/0xa80 [ 81.863080][ T9809] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 81.869068][ T9809] ? ___might_sleep+0x163/0x2c0 [ 81.874181][ T9809] ? wait_for_completion+0x440/0x440 [ 81.879458][ T9809] ? mutex_unlock+0xd/0x10 [ 81.884059][ T9809] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 81.890125][ T9809] nf_setsockopt+0x77/0xd0 [ 81.894533][ T9809] ip_setsockopt+0xdf/0x100 [ 81.899018][ T9809] udp_setsockopt+0x68/0xb0 [ 81.903607][ T9809] sock_common_setsockopt+0x94/0xd0 [ 81.908786][ T9809] __sys_setsockopt+0x261/0x4c0 [ 81.913802][ T9809] ? sock_create_kern+0x50/0x50 [ 81.918980][ T9809] ? down_read_non_owner+0x490/0x490 [ 81.924355][ T9809] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 81.930669][ T9809] ? handle_mm_fault+0x4ab/0xa50 [ 81.935869][ T9809] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 81.941305][ T9809] ? do_syscall_64+0x26/0x790 [ 81.946154][ T9809] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.953223][ T9809] ? do_syscall_64+0x26/0x790 [ 81.957913][ T9809] __x64_sys_setsockopt+0xbe/0x150 [ 81.963606][ T9809] do_syscall_64+0xfa/0x790 [ 81.968099][ T9809] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.973980][ T9809] RIP: 0033:0x441699 [ 81.978109][ T9809] 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 [ 81.998950][ T9809] RSP: 002b:00007ffdfb423e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 82.007543][ T9809] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 82.015500][ T9809] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 82.023576][ T9809] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 82.032062][ T9809] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 82.040014][ T9809] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 82.047981][ T9809] Modules linked in: [ 82.052482][ T9809] ---[ end trace db4eab3803d640a2 ]--- [ 82.057960][ T9809] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 82.063360][ T9809] 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 [ 82.084031][ T9809] RSP: 0018:ffffc90001d47940 EFLAGS: 00010202 [ 82.090077][ T9809] RAX: dffffc0000000000 RBX: ffff8880a7089200 RCX: ffffffff8673a332 [ 82.098070][ T9809] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 82.106074][ T9809] RBP: ffffc90001d47970 R08: ffff888095adc140 R09: ffffed1015d2703d [ 82.114144][ T9809] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 82.122142][ T9809] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 82.130128][ T9809] FS: 0000000000b38880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.139098][ T9809] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.145714][ T9809] CR2: 00000000200008e0 CR3: 0000000097f65000 CR4: 00000000001406e0 [ 82.153977][ T9809] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.162106][ T9809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.170168][ T9809] Kernel panic - not syncing: Fatal exception [ 82.177788][ T9809] Kernel Offset: disabled [ 82.182134][ T9809] Rebooting in 86400 seconds..