[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.370410][ T27] audit: type=1800 audit(1578710831.832:25): pid=9406 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.394766][ T27] audit: type=1800 audit(1578710831.832:26): pid=9406 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.472369][ T27] audit: type=1800 audit(1578710831.832:27): pid=9406 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 '10.128.0.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 93.152686][ T9561] kasan: CONFIG_KASAN_INLINE enabled [ 93.158232][ T9561] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 93.167205][ T9561] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 93.174141][ T9561] CPU: 0 PID: 9561 Comm: syz-executor768 Not tainted 5.5.0-rc5-syzkaller #0 [ 93.182787][ T9561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.192828][ T9561] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 93.198178][ T9561] 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 [ 93.217773][ T9561] RSP: 0018:ffffc90001e77940 EFLAGS: 00010202 [ 93.223826][ T9561] RAX: dffffc0000000000 RBX: ffff8880a4ac5700 RCX: ffffffff8673a332 [ 93.231778][ T9561] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 93.239727][ T9561] RBP: ffffc90001e77970 R08: ffff88808deb2280 R09: ffffed1015d0703d [ 93.247683][ T9561] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 93.255673][ T9561] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 93.263632][ T9561] FS: 0000000002178880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 93.272544][ T9561] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.279121][ T9561] CR2: 00000000200008e0 CR3: 00000000a04c4000 CR4: 00000000001406f0 [ 93.287090][ T9561] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.295038][ T9561] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.303001][ T9561] Call Trace: [ 93.306282][ T9561] ? xt_rateest_put+0x440/0x440 [ 93.311108][ T9561] xt_rateest_tg_destroy+0x72/0xa0 [ 93.316198][ T9561] ? xt_percpu_counter_free+0x8f/0xd0 [ 93.321547][ T9561] translate_table+0x11f4/0x1d80 [ 93.326466][ T9561] ? arpt_alloc_initial_table+0x690/0x690 [ 93.332161][ T9561] ? lock_downgrade+0x920/0x920 [ 93.336993][ T9561] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 93.343207][ T9561] ? _copy_from_user+0x12c/0x1a0 [ 93.348123][ T9561] do_arpt_set_ctl+0x317/0x650 [ 93.352873][ T9561] ? __do_replace+0xa80/0xa80 [ 93.357536][ T9561] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 93.363068][ T9561] ? ___might_sleep+0x163/0x2c0 [ 93.367897][ T9561] ? wait_for_completion+0x440/0x440 [ 93.373173][ T9561] ? mutex_unlock+0xd/0x10 [ 93.377579][ T9561] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 93.383537][ T9561] nf_setsockopt+0x77/0xd0 [ 93.387946][ T9561] ip_setsockopt+0xdf/0x100 [ 93.392435][ T9561] udp_setsockopt+0x68/0xb0 [ 93.396919][ T9561] sock_common_setsockopt+0x94/0xd0 [ 93.402098][ T9561] __sys_setsockopt+0x261/0x4c0 [ 93.406930][ T9561] ? sock_create_kern+0x50/0x50 [ 93.411767][ T9561] ? down_read_non_owner+0x490/0x490 [ 93.417030][ T9561] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 93.423244][ T9561] ? handle_mm_fault+0x4ab/0xa50 [ 93.428162][ T9561] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.433596][ T9561] ? do_syscall_64+0x26/0x790 [ 93.438260][ T9561] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.444320][ T9561] ? do_syscall_64+0x26/0x790 [ 93.448976][ T9561] __x64_sys_setsockopt+0xbe/0x150 [ 93.454066][ T9561] do_syscall_64+0xfa/0x790 [ 93.458550][ T9561] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.464436][ T9561] RIP: 0033:0x441699 [ 93.468311][ T9561] 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 [ 93.487900][ T9561] RSP: 002b:00007ffe03ea4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 93.496288][ T9561] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 93.504234][ T9561] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 93.512183][ T9561] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 93.520156][ T9561] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 93.528104][ T9561] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 93.536055][ T9561] Modules linked in: [ 93.540600][ T9561] ---[ end trace 17ef2b96aad528f7 ]--- [ 93.546099][ T9561] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 93.551451][ T9561] 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 [ 93.571075][ T9561] RSP: 0018:ffffc90001e77940 EFLAGS: 00010202 [ 93.577160][ T9561] RAX: dffffc0000000000 RBX: ffff8880a4ac5700 RCX: ffffffff8673a332 [ 93.585151][ T9561] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 93.593126][ T9561] RBP: ffffc90001e77970 R08: ffff88808deb2280 R09: ffffed1015d0703d [ 93.601115][ T9561] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 93.609100][ T9561] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 93.617083][ T9561] FS: 0000000002178880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 93.626065][ T9561] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.632638][ T9561] CR2: ffffffffff600400 CR3: 00000000a04c4000 CR4: 00000000001406f0 [ 93.640629][ T9561] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.648620][ T9561] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.656603][ T9561] Kernel panic - not syncing: Fatal exception [ 93.664282][ T9561] Kernel Offset: disabled [ 93.668615][ T9561] Rebooting in 86400 seconds..