[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.642580][ T26] audit: type=1800 audit(1578709004.526:25): pid=9452 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.662567][ T26] audit: type=1800 audit(1578709004.526:26): pid=9452 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.688044][ T26] audit: type=1800 audit(1578709004.526:27): pid=9452 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 '10.128.0.251' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 100.642363][ T9608] kasan: CONFIG_KASAN_INLINE enabled [ 100.647959][ T9608] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 100.656033][ T9608] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 100.663052][ T9608] CPU: 0 PID: 9608 Comm: syz-executor324 Not tainted 5.5.0-rc5-syzkaller #0 [ 100.671698][ T9608] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.681747][ T9608] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 100.687111][ T9608] 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 [ 100.706707][ T9608] RSP: 0018:ffffc90001da7940 EFLAGS: 00010202 [ 100.712765][ T9608] RAX: dffffc0000000000 RBX: ffff8880a79db300 RCX: ffffffff8673a332 [ 100.720742][ T9608] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 100.728707][ T9608] RBP: ffffc90001da7970 R08: ffff888090c0e0c0 R09: ffffed1015d0703d [ 100.736653][ T9608] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 100.744609][ T9608] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 100.752588][ T9608] FS: 00000000025c7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 100.761510][ T9608] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 100.768091][ T9608] CR2: 00000000200008e0 CR3: 00000000a7887000 CR4: 00000000001406f0 [ 100.776132][ T9608] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 100.784082][ T9608] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 100.792033][ T9608] Call Trace: [ 100.795320][ T9608] ? xt_rateest_put+0x440/0x440 [ 100.800148][ T9608] xt_rateest_tg_destroy+0x72/0xa0 [ 100.805343][ T9608] ? xt_percpu_counter_free+0x8f/0xd0 [ 100.810707][ T9608] translate_table+0x11f4/0x1d80 [ 100.815633][ T9608] ? arpt_alloc_initial_table+0x690/0x690 [ 100.821351][ T9608] ? lock_downgrade+0x920/0x920 [ 100.826190][ T9608] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 100.832536][ T9608] ? _copy_from_user+0x12c/0x1a0 [ 100.837462][ T9608] do_arpt_set_ctl+0x317/0x650 [ 100.842207][ T9608] ? __do_replace+0xa80/0xa80 [ 100.846892][ T9608] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 100.852422][ T9608] ? ___might_sleep+0x163/0x2c0 [ 100.857253][ T9608] ? wait_for_completion+0x440/0x440 [ 100.862532][ T9608] ? mutex_unlock+0xd/0x10 [ 100.866929][ T9608] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 100.872903][ T9608] nf_setsockopt+0x77/0xd0 [ 100.877385][ T9608] ip_setsockopt+0xdf/0x100 [ 100.881869][ T9608] udp_setsockopt+0x68/0xb0 [ 100.886352][ T9608] sock_common_setsockopt+0x94/0xd0 [ 100.891546][ T9608] __sys_setsockopt+0x261/0x4c0 [ 100.896375][ T9608] ? sock_create_kern+0x50/0x50 [ 100.901206][ T9608] ? down_read_non_owner+0x490/0x490 [ 100.906469][ T9608] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 100.912880][ T9608] ? handle_mm_fault+0x4ab/0xa50 [ 100.917812][ T9608] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 100.923271][ T9608] ? do_syscall_64+0x26/0x790 [ 100.927942][ T9608] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.933999][ T9608] ? do_syscall_64+0x26/0x790 [ 100.938669][ T9608] __x64_sys_setsockopt+0xbe/0x150 [ 100.943758][ T9608] do_syscall_64+0xfa/0x790 [ 100.948241][ T9608] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.954645][ T9608] RIP: 0033:0x441699 [ 100.958534][ T9608] 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 [ 100.978127][ T9608] RSP: 002b:00007ffd51233c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 100.986522][ T9608] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 100.994475][ T9608] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 101.002425][ T9608] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 101.010392][ T9608] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 101.018455][ T9608] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 101.026418][ T9608] Modules linked in: [ 101.030586][ T9608] ---[ end trace 0ef61e291b63f310 ]--- [ 101.036054][ T9608] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 101.041451][ T9608] 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 [ 101.061082][ T9608] RSP: 0018:ffffc90001da7940 EFLAGS: 00010202 [ 101.067143][ T9608] RAX: dffffc0000000000 RBX: ffff8880a79db300 RCX: ffffffff8673a332 [ 101.075130][ T9608] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 101.083126][ T9608] RBP: ffffc90001da7970 R08: ffff888090c0e0c0 R09: ffffed1015d0703d [ 101.091114][ T9608] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 101.099102][ T9608] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 101.107069][ T9608] FS: 00000000025c7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 101.116016][ T9608] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.123128][ T9608] CR2: 00000000200008e0 CR3: 00000000a7887000 CR4: 00000000001406f0 [ 101.131253][ T9608] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.139328][ T9608] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 101.147279][ T9608] Kernel panic - not syncing: Fatal exception [ 101.154796][ T9608] Kernel Offset: disabled [ 101.159139][ T9608] Rebooting in 86400 seconds..