[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 79.191548][ T27] audit: type=1800 audit(1578706494.903:25): pid=9694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 79.211942][ T27] audit: type=1800 audit(1578706494.903:26): pid=9694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 79.272920][ T27] audit: type=1800 audit(1578706494.983:27): pid=9694 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 '10.128.1.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.659910][ T9848] kasan: CONFIG_KASAN_INLINE enabled [ 97.665429][ T9848] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 97.673972][ T9848] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 97.680925][ T9848] CPU: 1 PID: 9848 Comm: syz-executor751 Not tainted 5.5.0-rc5-syzkaller #0 [ 97.689686][ T9848] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.699777][ T9848] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 97.705245][ T9848] 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 [ 97.724920][ T9848] RSP: 0018:ffffc90001dcf940 EFLAGS: 00010202 [ 97.731153][ T9848] RAX: dffffc0000000000 RBX: ffff88809ac9e300 RCX: ffffffff8673a332 [ 97.739105][ T9848] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 97.747056][ T9848] RBP: ffffc90001dcf970 R08: ffff8880a96721c0 R09: ffffed1015d2703d [ 97.755005][ T9848] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 97.762962][ T9848] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 97.770937][ T9848] FS: 0000000000fa2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 97.779864][ T9848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.786433][ T9848] CR2: 00000000200008e0 CR3: 00000000a2f38000 CR4: 00000000001406e0 [ 97.794392][ T9848] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.802373][ T9848] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.810325][ T9848] Call Trace: [ 97.813629][ T9848] ? xt_rateest_put+0x440/0x440 [ 97.818458][ T9848] xt_rateest_tg_destroy+0x72/0xa0 [ 97.823559][ T9848] ? xt_percpu_counter_free+0x8f/0xd0 [ 97.828914][ T9848] translate_table+0x11f4/0x1d80 [ 97.833835][ T9848] ? arpt_alloc_initial_table+0x690/0x690 [ 97.839548][ T9848] ? lock_downgrade+0x920/0x920 [ 97.844383][ T9848] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.850617][ T9848] ? _copy_from_user+0x12c/0x1a0 [ 97.855586][ T9848] do_arpt_set_ctl+0x317/0x650 [ 97.860328][ T9848] ? __do_replace+0xa80/0xa80 [ 97.864985][ T9848] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 97.870511][ T9848] ? ___might_sleep+0x163/0x2c0 [ 97.875338][ T9848] ? wait_for_completion+0x440/0x440 [ 97.880625][ T9848] ? mutex_unlock+0xd/0x10 [ 97.885021][ T9848] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 97.890982][ T9848] nf_setsockopt+0x77/0xd0 [ 97.895380][ T9848] ip_setsockopt+0xdf/0x100 [ 97.900039][ T9848] udp_setsockopt+0x68/0xb0 [ 97.904622][ T9848] sock_common_setsockopt+0x94/0xd0 [ 97.909802][ T9848] __sys_setsockopt+0x261/0x4c0 [ 97.914631][ T9848] ? sock_create_kern+0x50/0x50 [ 97.919638][ T9848] ? down_read_non_owner+0x490/0x490 [ 97.924901][ T9848] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 97.931124][ T9848] ? handle_mm_fault+0x4ab/0xa50 [ 97.936043][ T9848] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 97.941498][ T9848] ? do_syscall_64+0x26/0x790 [ 97.946859][ T9848] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.952918][ T9848] ? do_syscall_64+0x26/0x790 [ 97.957608][ T9848] __x64_sys_setsockopt+0xbe/0x150 [ 97.962710][ T9848] do_syscall_64+0xfa/0x790 [ 97.967197][ T9848] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.973090][ T9848] RIP: 0033:0x441699 [ 97.977094][ T9848] 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 [ 97.996766][ T9848] RSP: 002b:00007ffc8815f778 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 98.005156][ T9848] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 98.013106][ T9848] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 98.021060][ T9848] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 98.029011][ T9848] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 98.036974][ T9848] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 98.044937][ T9848] Modules linked in: [ 98.049479][ T9848] ---[ end trace 813d9ddbcf8e6b70 ]--- [ 98.055014][ T9848] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 98.060465][ T9848] 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 [ 98.080231][ T9848] RSP: 0018:ffffc90001dcf940 EFLAGS: 00010202 [ 98.086432][ T9848] RAX: dffffc0000000000 RBX: ffff88809ac9e300 RCX: ffffffff8673a332 [ 98.094582][ T9848] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 98.102648][ T9848] RBP: ffffc90001dcf970 R08: ffff8880a96721c0 R09: ffffed1015d2703d [ 98.110727][ T9848] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 98.118717][ T9848] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 98.126674][ T9848] FS: 0000000000fa2880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 98.135647][ T9848] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.142263][ T9848] CR2: 00000000200008e0 CR3: 00000000a2f38000 CR4: 00000000001406e0 [ 98.150260][ T9848] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.158258][ T9848] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.167006][ T9848] Kernel panic - not syncing: Fatal exception [ 98.174355][ T9848] Kernel Offset: disabled [ 98.178683][ T9848] Rebooting in 86400 seconds..