[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.368294][ T27] audit: type=1800 audit(1579160415.573:25): pid=9509 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.392369][ T27] audit: type=1800 audit(1579160415.573:26): pid=9509 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.440617][ T27] audit: type=1800 audit(1579160415.583:27): pid=9509 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 '10.128.0.67' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 94.480072][ T9661] kasan: CONFIG_KASAN_INLINE enabled [ 94.485672][ T9661] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 94.493751][ T9661] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 94.500694][ T9661] CPU: 0 PID: 9661 Comm: syz-executor903 Not tainted 5.5.0-rc6-syzkaller #0 [ 94.509399][ T9661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.519501][ T9661] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 94.526204][ T9661] Code: 15 76 04 fb 45 84 f6 0f 84 68 02 00 00 e8 c7 74 04 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 b9 ad f0 fa [ 94.545937][ T9661] RSP: 0018:ffffc90002057940 EFLAGS: 00010202 [ 94.551989][ T9661] RAX: dffffc0000000000 RBX: ffff8880a4b76d00 RCX: ffffffff86708332 [ 94.559951][ T9661] RDX: 000000000000026d RSI: ffffffff867080b9 RDI: 0000000000001368 [ 94.567944][ T9661] RBP: ffffc90002057970 R08: ffff88809f5d0180 R09: ffffed1015d0703d [ 94.575923][ T9661] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 94.583940][ T9661] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86708470 [ 94.591943][ T9661] FS: 000000000181f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 94.600865][ T9661] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.607494][ T9661] CR2: 00000000200008e0 CR3: 0000000093cc8000 CR4: 00000000001406f0 [ 94.615590][ T9661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.623560][ T9661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.631544][ T9661] Call Trace: [ 94.634835][ T9661] ? xt_rateest_put+0x440/0x440 [ 94.639676][ T9661] xt_rateest_tg_destroy+0x72/0xa0 [ 94.644782][ T9661] ? xt_percpu_counter_free+0x8f/0xd0 [ 94.650144][ T9661] translate_table+0x11f4/0x1d80 [ 94.655109][ T9661] ? arpt_alloc_initial_table+0x690/0x690 [ 94.660828][ T9661] ? lock_downgrade+0x920/0x920 [ 94.665680][ T9661] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 94.671936][ T9661] ? _copy_from_user+0x12c/0x1a0 [ 94.676878][ T9661] do_arpt_set_ctl+0x317/0x650 [ 94.681639][ T9661] ? __do_replace+0xa80/0xa80 [ 94.686317][ T9661] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 94.691865][ T9661] ? ___might_sleep+0x163/0x2c0 [ 94.696706][ T9661] ? wait_for_completion+0x440/0x440 [ 94.701976][ T9661] ? mutex_unlock+0xd/0x10 [ 94.706470][ T9661] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 94.712464][ T9661] nf_setsockopt+0x77/0xd0 [ 94.716891][ T9661] ip_setsockopt+0xdf/0x100 [ 94.721394][ T9661] udp_setsockopt+0x68/0xb0 [ 94.725916][ T9661] sock_common_setsockopt+0x94/0xd0 [ 94.731121][ T9661] __sys_setsockopt+0x261/0x4c0 [ 94.735982][ T9661] ? sock_create_kern+0x50/0x50 [ 94.740836][ T9661] ? down_read_non_owner+0x490/0x490 [ 94.746194][ T9661] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 94.752438][ T9661] ? handle_mm_fault+0x4ab/0xa50 [ 94.757362][ T9661] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 94.762835][ T9661] ? do_syscall_64+0x26/0x790 [ 94.767507][ T9661] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.773573][ T9661] ? do_syscall_64+0x26/0x790 [ 94.778285][ T9661] __x64_sys_setsockopt+0xbe/0x150 [ 94.783391][ T9661] do_syscall_64+0xfa/0x790 [ 94.787894][ T9661] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.793852][ T9661] RIP: 0033:0x4419a9 [ 94.797787][ T9661] 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 [ 94.817409][ T9661] RSP: 002b:00007ffe7dfda208 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 94.825802][ T9661] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004419a9 [ 94.833768][ T9661] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 94.841728][ T9661] RBP: 00000000006cc018 R08: 0000000000000430 R09: 00000000004002c8 [ 94.849676][ T9661] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000403230 [ 94.857638][ T9661] R13: 00000000004032c0 R14: 0000000000000000 R15: 0000000000000000 [ 94.865605][ T9661] Modules linked in: [ 94.870783][ T9661] ---[ end trace 413bc670f6ff0ed6 ]--- [ 94.876303][ T9661] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 94.881656][ T9661] Code: 15 76 04 fb 45 84 f6 0f 84 68 02 00 00 e8 c7 74 04 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 b9 ad f0 fa [ 94.901299][ T9661] RSP: 0018:ffffc90002057940 EFLAGS: 00010202 [ 94.907382][ T9661] RAX: dffffc0000000000 RBX: ffff8880a4b76d00 RCX: ffffffff86708332 [ 94.915371][ T9661] RDX: 000000000000026d RSI: ffffffff867080b9 RDI: 0000000000001368 [ 94.923349][ T9661] RBP: ffffc90002057970 R08: ffff88809f5d0180 R09: ffffed1015d0703d [ 94.931359][ T9661] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 94.939347][ T9661] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86708470 [ 94.947335][ T9661] FS: 000000000181f880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 94.956278][ T9661] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.962858][ T9661] CR2: 00000000200008e0 CR3: 0000000093cc8000 CR4: 00000000001406f0 [ 94.970894][ T9661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.978913][ T9661] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.986917][ T9661] Kernel panic - not syncing: Fatal exception [ 94.994288][ T9661] Kernel Offset: disabled [ 94.998616][ T9661] Rebooting in 86400 seconds..