[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.449961][ T27] audit: type=1800 audit(1578704793.919:25): pid=9393 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.469768][ T27] audit: type=1800 audit(1578704793.919:26): pid=9393 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.518984][ T27] audit: type=1800 audit(1578704793.929:27): pid=9393 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 '10.128.1.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 95.234525][ T9548] kasan: CONFIG_KASAN_INLINE enabled [ 95.240462][ T9548] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 95.248703][ T9548] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 95.255659][ T9548] CPU: 1 PID: 9548 Comm: syz-executor497 Not tainted 5.5.0-rc5-syzkaller #0 [ 95.264663][ T9548] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.274894][ T9548] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 95.280267][ T9548] 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 [ 95.299851][ T9548] RSP: 0018:ffffc90001dc7940 EFLAGS: 00010202 [ 95.305896][ T9548] RAX: dffffc0000000000 RBX: ffff8880a2707600 RCX: ffffffff8673a332 [ 95.313935][ T9548] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 95.322595][ T9548] RBP: ffffc90001dc7970 R08: ffff88809866e000 R09: ffffed1015d2703d [ 95.330557][ T9548] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 95.339040][ T9548] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 95.347472][ T9548] FS: 00000000010fd880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 95.356749][ T9548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.363329][ T9548] CR2: 00000000200008e0 CR3: 00000000a96bb000 CR4: 00000000001406e0 [ 95.371332][ T9548] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.379442][ T9548] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.387419][ T9548] Call Trace: [ 95.390710][ T9548] ? xt_rateest_put+0x440/0x440 [ 95.395541][ T9548] xt_rateest_tg_destroy+0x72/0xa0 [ 95.402632][ T9548] ? xt_percpu_counter_free+0x8f/0xd0 [ 95.408072][ T9548] translate_table+0x11f4/0x1d80 [ 95.413023][ T9548] ? arpt_alloc_initial_table+0x690/0x690 [ 95.418724][ T9548] ? lock_downgrade+0x920/0x920 [ 95.423675][ T9548] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 95.430074][ T9548] ? _copy_from_user+0x12c/0x1a0 [ 95.436823][ T9548] do_arpt_set_ctl+0x317/0x650 [ 95.441839][ T9548] ? __do_replace+0xa80/0xa80 [ 95.446528][ T9548] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 95.452067][ T9548] ? ___might_sleep+0x163/0x2c0 [ 95.456899][ T9548] ? wait_for_completion+0x440/0x440 [ 95.462290][ T9548] ? mutex_unlock+0xd/0x10 [ 95.467173][ T9548] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 95.473159][ T9548] nf_setsockopt+0x77/0xd0 [ 95.477940][ T9548] ip_setsockopt+0xdf/0x100 [ 95.482449][ T9548] udp_setsockopt+0x68/0xb0 [ 95.491893][ T9548] sock_common_setsockopt+0x94/0xd0 [ 95.497094][ T9548] __sys_setsockopt+0x261/0x4c0 [ 95.501926][ T9548] ? sock_create_kern+0x50/0x50 [ 95.506859][ T9548] ? down_read_non_owner+0x490/0x490 [ 95.512570][ T9548] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 95.518801][ T9548] ? handle_mm_fault+0x4ab/0xa50 [ 95.523730][ T9548] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 95.529279][ T9548] ? do_syscall_64+0x26/0x790 [ 95.533935][ T9548] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.540009][ T9548] ? do_syscall_64+0x26/0x790 [ 95.544692][ T9548] __x64_sys_setsockopt+0xbe/0x150 [ 95.549797][ T9548] do_syscall_64+0xfa/0x790 [ 95.554544][ T9548] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 95.560419][ T9548] RIP: 0033:0x441699 [ 95.564305][ T9548] 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 [ 95.585387][ T9548] RSP: 002b:00007fff88f86928 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 95.594313][ T9548] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 95.602279][ T9548] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 95.610341][ T9548] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 95.618305][ T9548] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 95.626258][ T9548] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 95.634211][ T9548] Modules linked in: [ 95.638864][ T9548] ---[ end trace e296641696e2da8c ]--- [ 95.644356][ T9548] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 95.649933][ T9548] 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 [ 95.669577][ T9548] RSP: 0018:ffffc90001dc7940 EFLAGS: 00010202 [ 95.675665][ T9548] RAX: dffffc0000000000 RBX: ffff8880a2707600 RCX: ffffffff8673a332 [ 95.683660][ T9548] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 95.691958][ T9548] RBP: ffffc90001dc7970 R08: ffff88809866e000 R09: ffffed1015d2703d [ 95.701259][ T9548] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 95.709278][ T9548] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 95.717277][ T9548] FS: 00000000010fd880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 95.726232][ T9548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 95.732811][ T9548] CR2: 00000000200008e0 CR3: 00000000a96bb000 CR4: 00000000001406e0 [ 95.741012][ T9548] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 95.749967][ T9548] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 95.758048][ T9548] Kernel panic - not syncing: Fatal exception [ 95.765500][ T9548] Kernel Offset: disabled [ 95.769837][ T9548] Rebooting in 86400 seconds..