[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.511471][ T27] audit: type=1800 audit(1577382307.320:25): pid=9044 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.537146][ T27] audit: type=1800 audit(1577382307.320:26): pid=9044 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.583930][ T27] audit: type=1800 audit(1577382307.320:27): pid=9044 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 '10.128.0.158' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.362765][ T9200] kasan: CONFIG_KASAN_INLINE enabled [ 92.368197][ T9200] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 92.376248][ T9200] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 92.383162][ T9200] CPU: 1 PID: 9200 Comm: syz-executor136 Not tainted 5.5.0-rc2-syzkaller #0 [ 92.391815][ T9200] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.401902][ T9200] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 92.408211][ T9200] Code: 89 61 0b fb 45 84 f6 0f 84 08 07 00 00 e8 3b 60 0b fb 49 8d bd a8 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 a8 13 00 00 e8 7d 98 f7 fa [ 92.427793][ T9200] RSP: 0018:ffffc90001ff7788 EFLAGS: 00010202 [ 92.433849][ T9200] RAX: dffffc0000000000 RBX: ffffc90001ff7ae8 RCX: ffffffff8669d4ce [ 92.441808][ T9200] RDX: 0000000000000275 RSI: ffffffff8669cdb5 RDI: 00000000000013a8 [ 92.449771][ T9200] RBP: ffffc90001ff7848 R08: ffff888094ed6240 R09: ffffed1015d2703d [ 92.457781][ T9200] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 92.465737][ T9200] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001ff7820 [ 92.473695][ T9200] FS: 0000000001083880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 92.482603][ T9200] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.489169][ T9200] CR2: 0000000020000820 CR3: 00000000a816d000 CR4: 00000000001406e0 [ 92.497122][ T9200] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.505116][ T9200] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.513087][ T9200] Call Trace: [ 92.516377][ T9200] ? xt_rateest_lookup+0x270/0x270 [ 92.521471][ T9200] ? __kasan_check_write+0x14/0x20 [ 92.526565][ T9200] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 92.532095][ T9200] ? xt_rateest_lookup+0x270/0x270 [ 92.537185][ T9200] xt_check_target+0x283/0x690 [ 92.541957][ T9200] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 92.547743][ T9200] ? mutex_unlock+0xd/0x10 [ 92.552181][ T9200] ? xt_find_target+0x73/0x280 [ 92.556993][ T9200] ? xt_find_target+0x73/0x280 [ 92.561740][ T9200] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.567962][ T9200] translate_table+0x1005/0x1d70 [ 92.572919][ T9200] ? arpt_alloc_initial_table+0x690/0x690 [ 92.578617][ T9200] ? lock_downgrade+0x920/0x920 [ 92.583463][ T9200] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.589737][ T9200] ? _copy_from_user+0x12c/0x1a0 [ 92.594668][ T9200] do_arpt_set_ctl+0x310/0x640 [ 92.599413][ T9200] ? __do_replace+0xa80/0xa80 [ 92.604071][ T9200] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 92.609679][ T9200] ? ___might_sleep+0x163/0x2c0 [ 92.614510][ T9200] ? wait_for_completion+0x440/0x440 [ 92.619819][ T9200] ? mutex_unlock+0xd/0x10 [ 92.624215][ T9200] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 92.630174][ T9200] nf_setsockopt+0x77/0xd0 [ 92.634570][ T9200] ip_setsockopt+0xdf/0x100 [ 92.639103][ T9200] udp_setsockopt+0x68/0xb0 [ 92.643592][ T9200] sock_common_setsockopt+0x94/0xd0 [ 92.648771][ T9200] __sys_setsockopt+0x261/0x4c0 [ 92.653601][ T9200] ? sock_create_kern+0x50/0x50 [ 92.658431][ T9200] ? down_read_non_owner+0x490/0x490 [ 92.663713][ T9200] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 92.669933][ T9200] ? handle_mm_fault+0x4ab/0xa50 [ 92.674851][ T9200] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.680287][ T9200] ? do_syscall_64+0x26/0x790 [ 92.684942][ T9200] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.691012][ T9200] ? do_syscall_64+0x26/0x790 [ 92.695670][ T9200] __x64_sys_setsockopt+0xbe/0x150 [ 92.700762][ T9200] do_syscall_64+0xfa/0x790 [ 92.705250][ T9200] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.711145][ T9200] RIP: 0033:0x4414d9 [ 92.715018][ T9200] 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 [ 92.734640][ T9200] RSP: 002b:00007ffd15d0ad08 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 92.743053][ T9200] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004414d9 [ 92.751019][ T9200] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 92.758970][ T9200] RBP: 00000000006cb018 R08: 0000000000000530 R09: 00000000004002c8 [ 92.766918][ T9200] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000402d60 [ 92.774868][ T9200] R13: 0000000000402df0 R14: 0000000000000000 R15: 0000000000000000 [ 92.782826][ T9200] Modules linked in: [ 92.787168][ T9200] ---[ end trace 94c4b35aadf94b9d ]--- [ 92.792635][ T9200] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 92.798994][ T9200] Code: 89 61 0b fb 45 84 f6 0f 84 08 07 00 00 e8 3b 60 0b fb 49 8d bd a8 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 a8 13 00 00 e8 7d 98 f7 fa [ 92.818636][ T9200] RSP: 0018:ffffc90001ff7788 EFLAGS: 00010202 [ 92.824680][ T9200] RAX: dffffc0000000000 RBX: ffffc90001ff7ae8 RCX: ffffffff8669d4ce [ 92.832676][ T9200] RDX: 0000000000000275 RSI: ffffffff8669cdb5 RDI: 00000000000013a8 [ 92.840686][ T9200] RBP: ffffc90001ff7848 R08: ffff888094ed6240 R09: ffffed1015d2703d [ 92.848669][ T9200] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 92.856643][ T9200] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001ff7820 [ 92.864648][ T9200] FS: 0000000001083880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 92.873625][ T9200] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.880250][ T9200] CR2: 0000000020000820 CR3: 00000000a816d000 CR4: 00000000001406e0 [ 92.888237][ T9200] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.896191][ T9200] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.904190][ T9200] Kernel panic - not syncing: Fatal exception [ 92.911652][ T9200] Kernel Offset: disabled [ 92.915991][ T9200] Rebooting in 86400 seconds..