[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.943457][ T27] audit: type=1800 audit(1578288342.087:25): pid=9316 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.970083][ T27] audit: type=1800 audit(1578288342.087:26): pid=9316 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.039047][ T27] audit: type=1800 audit(1578288342.087:27): pid=9316 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 '10.128.0.65' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.615519][ T9470] kasan: CONFIG_KASAN_INLINE enabled [ 91.620943][ T9470] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 91.629024][ T9470] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 91.635947][ T9470] CPU: 0 PID: 9470 Comm: syz-executor992 Not tainted 5.5.0-rc5-syzkaller #0 [ 91.644596][ T9470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.654765][ T9470] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 91.661079][ T9470] Code: 29 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 db 52 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 8b ed fa [ 91.680661][ T9470] RSP: 0018:ffffc90001ff7788 EFLAGS: 00010202 [ 91.686705][ T9470] RAX: dffffc0000000000 RBX: ffffc90001ff7ae8 RCX: ffffffff8673e16e [ 91.694659][ T9470] RDX: 000000000000026d RSI: ffffffff8673da55 RDI: 0000000000001368 [ 91.702644][ T9470] RBP: ffffc90001ff7848 R08: ffff8880994b6500 R09: ffffed1015d0703d [ 91.710594][ T9470] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 91.718545][ T9470] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001ff7820 [ 91.726497][ T9470] FS: 00000000010ce880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 91.735401][ T9470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.741959][ T9470] CR2: 0000000020000920 CR3: 0000000093b8a000 CR4: 00000000001406f0 [ 91.749910][ T9470] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.757870][ T9470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.765830][ T9470] Call Trace: [ 91.769102][ T9470] ? xt_rateest_lookup+0x270/0x270 [ 91.774192][ T9470] ? __kasan_check_write+0x14/0x20 [ 91.779285][ T9470] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 91.784827][ T9470] ? xt_rateest_lookup+0x270/0x270 [ 91.789924][ T9470] xt_check_target+0x283/0x690 [ 91.794688][ T9470] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 91.800534][ T9470] ? mutex_unlock+0xd/0x10 [ 91.804930][ T9470] ? xt_find_target+0x73/0x280 [ 91.809738][ T9470] ? xt_find_target+0x73/0x280 [ 91.814494][ T9470] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 91.820715][ T9470] translate_table+0x1005/0x1d70 [ 91.825645][ T9470] ? arpt_alloc_initial_table+0x690/0x690 [ 91.831342][ T9470] ? lock_downgrade+0x920/0x920 [ 91.836180][ T9470] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 91.842404][ T9470] ? _copy_from_user+0x12c/0x1a0 [ 91.847335][ T9470] do_arpt_set_ctl+0x310/0x640 [ 91.852075][ T9470] ? __do_replace+0xa80/0xa80 [ 91.856751][ T9470] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 91.862330][ T9470] ? ___might_sleep+0x163/0x2c0 [ 91.867946][ T9470] ? wait_for_completion+0x440/0x440 [ 91.873323][ T9470] ? mutex_unlock+0xd/0x10 [ 91.877891][ T9470] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 91.884564][ T9470] nf_setsockopt+0x77/0xd0 [ 91.889146][ T9470] ip_setsockopt+0xdf/0x100 [ 91.893719][ T9470] udp_setsockopt+0x68/0xb0 [ 91.898319][ T9470] sock_common_setsockopt+0x94/0xd0 [ 91.903620][ T9470] __sys_setsockopt+0x261/0x4c0 [ 91.908464][ T9470] ? sock_create_kern+0x50/0x50 [ 91.913309][ T9470] ? down_read_non_owner+0x490/0x490 [ 91.918606][ T9470] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 91.924836][ T9470] ? handle_mm_fault+0x4ab/0xa50 [ 91.929784][ T9470] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 91.935241][ T9470] ? do_syscall_64+0x26/0x790 [ 91.940027][ T9470] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.946078][ T9470] ? do_syscall_64+0x26/0x790 [ 91.950749][ T9470] __x64_sys_setsockopt+0xbe/0x150 [ 91.955859][ T9470] do_syscall_64+0xfa/0x790 [ 91.960374][ T9470] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.966262][ T9470] RIP: 0033:0x4412e9 [ 91.970200][ T9470] 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 [ 91.990859][ T9470] RSP: 002b:00007ffcf8e6e538 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 91.999363][ T9470] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004412e9 [ 92.007324][ T9470] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 92.015334][ T9470] RBP: 00000000006cb018 R08: 0000000000000408 R09: 00000000004002c8 [ 92.023473][ T9470] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000402b70 [ 92.031489][ T9470] R13: 0000000000402c00 R14: 0000000000000000 R15: 0000000000000000 [ 92.039456][ T9470] Modules linked in: [ 92.044268][ T9470] ---[ end trace a4f38eca3e953081 ]--- [ 92.050253][ T9470] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 92.056614][ T9470] Code: 29 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 db 52 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 8b ed fa [ 92.076401][ T9470] RSP: 0018:ffffc90001ff7788 EFLAGS: 00010202 [ 92.082529][ T9470] RAX: dffffc0000000000 RBX: ffffc90001ff7ae8 RCX: ffffffff8673e16e [ 92.090574][ T9470] RDX: 000000000000026d RSI: ffffffff8673da55 RDI: 0000000000001368 [ 92.098544][ T9470] RBP: ffffc90001ff7848 R08: ffff8880994b6500 R09: ffffed1015d0703d [ 92.106539][ T9470] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 92.114543][ T9470] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001ff7820 [ 92.122526][ T9470] FS: 00000000010ce880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.131484][ T9470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.138068][ T9470] CR2: 0000000020000920 CR3: 0000000093b8a000 CR4: 00000000001406f0 [ 92.146067][ T9470] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.154052][ T9470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.162049][ T9470] Kernel panic - not syncing: Fatal exception [ 92.169494][ T9470] Kernel Offset: disabled [ 92.173824][ T9470] Rebooting in 86400 seconds..