[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 91.051387][ T27] audit: type=1800 audit(1578705815.131:25): pid=9483 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 91.077479][ T27] audit: type=1800 audit(1578705815.131:26): pid=9483 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 91.128310][ T27] audit: type=1800 audit(1578705815.141:27): pid=9483 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 '10.128.0.250' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 103.684276][ T9635] kasan: CONFIG_KASAN_INLINE enabled [ 103.691391][ T9635] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 103.700549][ T9635] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 103.708191][ T9635] CPU: 1 PID: 9635 Comm: syz-executor061 Not tainted 5.5.0-rc5-syzkaller #0 [ 103.716853][ T9635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.727008][ T9635] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 103.732554][ T9635] 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 [ 103.752153][ T9635] RSP: 0018:ffffc90001e07940 EFLAGS: 00010202 [ 103.758217][ T9635] RAX: dffffc0000000000 RBX: ffff8880a3cf2200 RCX: ffffffff8673a332 [ 103.766166][ T9635] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 103.774127][ T9635] RBP: ffffc90001e07970 R08: ffff88809fea6080 R09: ffffed1015d2703d [ 103.782082][ T9635] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 103.790033][ T9635] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 103.797992][ T9635] FS: 00000000008f2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 103.806909][ T9635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 103.813484][ T9635] CR2: 00000000200008e0 CR3: 00000000a95b9000 CR4: 00000000001406e0 [ 103.821436][ T9635] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 103.829559][ T9635] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 103.837507][ T9635] Call Trace: [ 103.840781][ T9635] ? xt_rateest_put+0x440/0x440 [ 103.845620][ T9635] xt_rateest_tg_destroy+0x72/0xa0 [ 103.850710][ T9635] ? xt_percpu_counter_free+0x8f/0xd0 [ 103.856060][ T9635] translate_table+0x11f4/0x1d80 [ 103.860979][ T9635] ? arpt_alloc_initial_table+0x690/0x690 [ 103.866684][ T9635] ? lock_downgrade+0x920/0x920 [ 103.871538][ T9635] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.877772][ T9635] ? _copy_from_user+0x12c/0x1a0 [ 103.882695][ T9635] do_arpt_set_ctl+0x317/0x650 [ 103.887548][ T9635] ? __do_replace+0xa80/0xa80 [ 103.892257][ T9635] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 103.897795][ T9635] ? ___might_sleep+0x163/0x2c0 [ 103.902644][ T9635] ? wait_for_completion+0x440/0x440 [ 103.907957][ T9635] ? mutex_unlock+0xd/0x10 [ 103.912356][ T9635] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 103.918329][ T9635] nf_setsockopt+0x77/0xd0 [ 103.922730][ T9635] ip_setsockopt+0xdf/0x100 [ 103.927308][ T9635] udp_setsockopt+0x68/0xb0 [ 103.931792][ T9635] sock_common_setsockopt+0x94/0xd0 [ 103.936966][ T9635] __sys_setsockopt+0x261/0x4c0 [ 103.941795][ T9635] ? sock_create_kern+0x50/0x50 [ 103.946636][ T9635] ? down_read_non_owner+0x490/0x490 [ 103.953985][ T9635] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 103.960312][ T9635] ? handle_mm_fault+0x4ab/0xa50 [ 103.965243][ T9635] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 103.970689][ T9635] ? do_syscall_64+0x26/0x790 [ 103.975359][ T9635] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.981529][ T9635] ? do_syscall_64+0x26/0x790 [ 103.986413][ T9635] __x64_sys_setsockopt+0xbe/0x150 [ 103.991509][ T9635] do_syscall_64+0xfa/0x790 [ 103.996006][ T9635] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.001909][ T9635] RIP: 0033:0x441699 [ 104.005798][ T9635] 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 [ 104.025390][ T9635] RSP: 002b:00007ffcc01f3418 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 104.033915][ T9635] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 104.041905][ T9635] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 104.049866][ T9635] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 104.057872][ T9635] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 104.065843][ T9635] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 104.073906][ T9635] Modules linked in: [ 104.078690][ T9635] ---[ end trace 615f724dbf0e785e ]--- [ 104.084364][ T9635] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 104.089995][ T9635] 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 [ 104.109897][ T9635] RSP: 0018:ffffc90001e07940 EFLAGS: 00010202 [ 104.116075][ T9635] RAX: dffffc0000000000 RBX: ffff8880a3cf2200 RCX: ffffffff8673a332 [ 104.124189][ T9635] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 104.132210][ T9635] RBP: ffffc90001e07970 R08: ffff88809fea6080 R09: ffffed1015d2703d [ 104.140255][ T9635] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 104.148264][ T9635] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 104.156562][ T9635] FS: 00000000008f2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 104.165721][ T9635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.172331][ T9635] CR2: 00000000200008e0 CR3: 00000000a95b9000 CR4: 00000000001406e0 [ 104.180450][ T9635] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.188441][ T9635] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.197005][ T9635] Kernel panic - not syncing: Fatal exception [ 104.204546][ T9635] Kernel Offset: disabled [ 104.208959][ T9635] Rebooting in 86400 seconds..