[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 71.667949][ T26] audit: type=1800 audit(1577382301.951:25): pid=9102 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 71.701415][ T26] audit: type=1800 audit(1577382301.961:26): pid=9102 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 71.732350][ T26] audit: type=1800 audit(1577382301.961:27): pid=9102 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 '10.128.1.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.471469][ T9257] kasan: CONFIG_KASAN_INLINE enabled [ 81.476830][ T9257] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 81.485018][ T9257] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 81.491961][ T9257] CPU: 1 PID: 9257 Comm: syz-executor322 Not tainted 5.5.0-rc3-syzkaller #0 [ 81.500617][ T9257] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.510661][ T9257] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 81.517748][ T9257] Code: d9 f2 0d fb 45 84 f6 0f 84 08 07 00 00 e8 8b f1 0d 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 29 fa fa [ 81.537337][ T9257] RSP: 0018:ffffc90001d07788 EFLAGS: 00010202 [ 81.543392][ T9257] RAX: dffffc0000000000 RBX: ffffc90001d07ae8 RCX: ffffffff8667437e [ 81.551359][ T9257] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 81.559312][ T9257] RBP: ffffc90001d07848 R08: ffff8880a389a2c0 R09: ffffed1015d2703d [ 81.567350][ T9257] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 81.575296][ T9257] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001d07820 [ 81.583310][ T9257] FS: 0000000000cc5880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 81.592258][ T9257] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.598822][ T9257] CR2: 0000000020000820 CR3: 00000000a4aff000 CR4: 00000000001406e0 [ 81.606782][ T9257] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.614738][ T9257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.622683][ T9257] Call Trace: [ 81.625956][ T9257] ? xt_rateest_lookup+0x270/0x270 [ 81.631042][ T9257] ? __kasan_check_write+0x14/0x20 [ 81.636134][ T9257] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 81.641661][ T9257] ? xt_rateest_lookup+0x270/0x270 [ 81.646753][ T9257] xt_check_target+0x283/0x690 [ 81.651495][ T9257] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 81.658316][ T9257] ? mutex_unlock+0xd/0x10 [ 81.662711][ T9257] ? xt_find_target+0x73/0x280 [ 81.667450][ T9257] ? xt_find_target+0x73/0x280 [ 81.672291][ T9257] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 81.678507][ T9257] translate_table+0x1005/0x1d70 [ 81.683425][ T9257] ? arpt_alloc_initial_table+0x690/0x690 [ 81.689120][ T9257] ? lock_downgrade+0x920/0x920 [ 81.693951][ T9257] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 81.700167][ T9257] ? _copy_from_user+0x12c/0x1a0 [ 81.705084][ T9257] do_arpt_set_ctl+0x310/0x640 [ 81.709824][ T9257] ? __do_replace+0xa80/0xa80 [ 81.714476][ T9257] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 81.720003][ T9257] ? ___might_sleep+0x163/0x2c0 [ 81.724828][ T9257] ? wait_for_completion+0x440/0x440 [ 81.730087][ T9257] ? mutex_unlock+0xd/0x10 [ 81.734478][ T9257] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 81.740432][ T9257] nf_setsockopt+0x77/0xd0 [ 81.744825][ T9257] ip_setsockopt+0xdf/0x100 [ 81.749303][ T9257] udp_setsockopt+0x68/0xb0 [ 81.753783][ T9257] sock_common_setsockopt+0x94/0xd0 [ 81.758968][ T9257] __sys_setsockopt+0x261/0x4c0 [ 81.763799][ T9257] ? sock_create_kern+0x50/0x50 [ 81.768626][ T9257] ? down_read_non_owner+0x490/0x490 [ 81.773920][ T9257] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 81.780172][ T9257] ? handle_mm_fault+0x4ab/0xa50 [ 81.785101][ T9257] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 81.790546][ T9257] ? do_syscall_64+0x26/0x790 [ 81.795231][ T9257] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.801286][ T9257] ? do_syscall_64+0x26/0x790 [ 81.805953][ T9257] __x64_sys_setsockopt+0xbe/0x150 [ 81.811042][ T9257] do_syscall_64+0xfa/0x790 [ 81.815530][ T9257] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.821399][ T9257] RIP: 0033:0x4414d9 [ 81.825273][ T9257] 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 [ 81.845232][ T9257] RSP: 002b:00007ffefe6708d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 81.853625][ T9257] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004414d9 [ 81.861573][ T9257] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 81.869518][ T9257] RBP: 00000000006cb018 R08: 0000000000000530 R09: 00000000004002c8 [ 81.877475][ T9257] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000402d60 [ 81.885423][ T9257] R13: 0000000000402df0 R14: 0000000000000000 R15: 0000000000000000 [ 81.893376][ T9257] Modules linked in: [ 81.897611][ T9257] ---[ end trace e1797848f68f011b ]--- [ 81.903145][ T9257] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 81.909454][ T9257] Code: d9 f2 0d fb 45 84 f6 0f 84 08 07 00 00 e8 8b f1 0d 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 29 fa fa [ 81.929099][ T9257] RSP: 0018:ffffc90001d07788 EFLAGS: 00010202 [ 81.935200][ T9257] RAX: dffffc0000000000 RBX: ffffc90001d07ae8 RCX: ffffffff8667437e [ 81.943190][ T9257] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 81.951161][ T9257] RBP: ffffc90001d07848 R08: ffff8880a389a2c0 R09: ffffed1015d2703d [ 81.959163][ T9257] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 81.967157][ T9257] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001d07820 [ 81.975139][ T9257] FS: 0000000000cc5880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 81.984081][ T9257] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.990640][ T9257] CR2: 0000000020000820 CR3: 00000000a4aff000 CR4: 00000000001406e0 [ 81.998628][ T9257] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.006658][ T9257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.014635][ T9257] Kernel panic - not syncing: Fatal exception [ 82.021955][ T9257] Kernel Offset: disabled [ 82.026294][ T9257] Rebooting in 86400 seconds..