[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 71.148870][ T26] audit: type=1800 audit(1577387600.094:25): pid=9035 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 71.173622][ T26] audit: type=1800 audit(1577387600.094:26): pid=9035 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 71.227268][ T26] audit: type=1800 audit(1577387600.094:27): pid=9035 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 '10.128.10.58' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.282980][ T9188] kasan: CONFIG_KASAN_INLINE enabled [ 83.288388][ T9188] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 83.296493][ T9188] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 83.303436][ T9188] CPU: 1 PID: 9188 Comm: syz-executor670 Not tainted 5.5.0-rc3-syzkaller #0 [ 83.312081][ T9188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.322122][ T9188] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 83.328431][ T9188] 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 [ 83.348030][ T9188] RSP: 0018:ffffc90001df7788 EFLAGS: 00010202 [ 83.354075][ T9188] RAX: dffffc0000000000 RBX: ffffc90001df7ae8 RCX: ffffffff8667437e [ 83.362025][ T9188] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 83.369987][ T9188] RBP: ffffc90001df7848 R08: ffff888093e48540 R09: ffffed1015d2703d [ 83.377944][ T9188] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 83.385907][ T9188] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001df7820 [ 83.393909][ T9188] FS: 0000000001250880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.402815][ T9188] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.409377][ T9188] CR2: 0000000020000820 CR3: 000000008f27a000 CR4: 00000000001406e0 [ 83.417328][ T9188] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.425277][ T9188] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.433223][ T9188] Call Trace: [ 83.436494][ T9188] ? xt_rateest_lookup+0x270/0x270 [ 83.441625][ T9188] ? __kasan_check_write+0x14/0x20 [ 83.446713][ T9188] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 83.452278][ T9188] ? xt_rateest_lookup+0x270/0x270 [ 83.457368][ T9188] xt_check_target+0x283/0x690 [ 83.462109][ T9188] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 83.467889][ T9188] ? mutex_unlock+0xd/0x10 [ 83.472281][ T9188] ? xt_find_target+0x73/0x280 [ 83.477085][ T9188] ? xt_find_target+0x73/0x280 [ 83.481832][ T9188] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.488050][ T9188] translate_table+0x1005/0x1d70 [ 83.492967][ T9188] ? arpt_alloc_initial_table+0x690/0x690 [ 83.498665][ T9188] ? lock_downgrade+0x920/0x920 [ 83.503496][ T9188] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.509763][ T9188] ? _copy_from_user+0x12c/0x1a0 [ 83.514679][ T9188] do_arpt_set_ctl+0x310/0x640 [ 83.519419][ T9188] ? __do_replace+0xa80/0xa80 [ 83.524072][ T9188] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 83.529590][ T9188] ? ___might_sleep+0x163/0x2c0 [ 83.534423][ T9188] ? wait_for_completion+0x440/0x440 [ 83.539682][ T9188] ? mutex_unlock+0xd/0x10 [ 83.544074][ T9188] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 83.550027][ T9188] nf_setsockopt+0x77/0xd0 [ 83.554424][ T9188] ip_setsockopt+0xdf/0x100 [ 83.558950][ T9188] udp_setsockopt+0x68/0xb0 [ 83.563431][ T9188] sock_common_setsockopt+0x94/0xd0 [ 83.568605][ T9188] __sys_setsockopt+0x261/0x4c0 [ 83.573431][ T9188] ? sock_create_kern+0x50/0x50 [ 83.578257][ T9188] ? down_read_non_owner+0x490/0x490 [ 83.583522][ T9188] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 83.589801][ T9188] ? handle_mm_fault+0x4ab/0xa50 [ 83.594733][ T9188] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.600237][ T9188] ? do_syscall_64+0x26/0x790 [ 83.604900][ T9188] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.611069][ T9188] ? do_syscall_64+0x26/0x790 [ 83.615737][ T9188] __x64_sys_setsockopt+0xbe/0x150 [ 83.620831][ T9188] do_syscall_64+0xfa/0x790 [ 83.625319][ T9188] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.631201][ T9188] RIP: 0033:0x4414d9 [ 83.635077][ T9188] 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 [ 83.654660][ T9188] RSP: 002b:00007fff75392588 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 83.663047][ T9188] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004414d9 [ 83.670996][ T9188] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 83.678945][ T9188] RBP: 00000000006cb018 R08: 0000000000000530 R09: 00000000004002c8 [ 83.686895][ T9188] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000402d60 [ 83.694842][ T9188] R13: 0000000000402df0 R14: 0000000000000000 R15: 0000000000000000 [ 83.702814][ T9188] Modules linked in: [ 83.707254][ T9188] ---[ end trace 6eeb34579322f089 ]--- [ 83.712718][ T9188] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 83.719064][ T9188] 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 [ 83.738858][ T9188] RSP: 0018:ffffc90001df7788 EFLAGS: 00010202 [ 83.744934][ T9188] RAX: dffffc0000000000 RBX: ffffc90001df7ae8 RCX: ffffffff8667437e [ 83.752900][ T9188] RDX: 000000000000026d RSI: ffffffff86673c65 RDI: 0000000000001368 [ 83.760887][ T9188] RBP: ffffc90001df7848 R08: ffff888093e48540 R09: ffffed1015d2703d [ 83.768864][ T9188] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 83.776849][ T9188] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001df7820 [ 83.784855][ T9188] FS: 0000000001250880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.793817][ T9188] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.800391][ T9188] CR2: 0000000020000820 CR3: 000000008f27a000 CR4: 00000000001406e0 [ 83.808381][ T9188] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.816368][ T9188] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.824363][ T9188] Kernel panic - not syncing: Fatal exception [ 83.831564][ T9188] Kernel Offset: disabled [ 83.835889][ T9188] Rebooting in 86400 seconds..