[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.717927][ T27] audit: type=1800 audit(1577499361.626:25): pid=9016 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.738674][ T27] audit: type=1800 audit(1577499361.626:26): pid=9016 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.773784][ T27] audit: type=1800 audit(1577499361.636:27): pid=9016 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 '10.128.0.210' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.723554][ T9171] kasan: CONFIG_KASAN_INLINE enabled [ 85.728977][ T9171] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 85.737105][ T9171] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 85.744060][ T9171] CPU: 0 PID: 9171 Comm: syz-executor797 Not tainted 5.5.0-rc3-syzkaller #0 [ 85.752712][ T9171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.762779][ T9171] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 85.768493][ T9171] Code: 22 22 fb 45 84 f6 0f 84 5c 03 00 00 e8 07 21 22 fb 49 8d bc 24 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 9f 06 00 00 4d 8b b4 24 68 13 00 00 e8 47 59 0e [ 85.788090][ T9171] RSP: 0018:ffffc90001f177a8 EFLAGS: 00010202 [ 85.794139][ T9171] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff86531056 [ 85.802102][ T9171] RDX: 000000000000026d RSI: ffffffff86530ce9 RDI: 0000000000001368 [ 85.810061][ T9171] RBP: ffffc90001f177e8 R08: ffff88808fd96200 R09: ffffed1015d0703d [ 85.818015][ T9171] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 85.825966][ T9171] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 85.833921][ T9171] FS: 00000000009fd880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 85.842829][ T9171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.849391][ T9171] CR2: 00000000200008a0 CR3: 0000000093cc3000 CR4: 00000000001406f0 [ 85.857341][ T9171] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.865293][ T9171] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.873241][ T9171] Call Trace: [ 85.876528][ T9171] ? lock_downgrade+0x920/0x920 [ 85.881361][ T9171] nf_ct_netns_get+0x41/0x150 [ 85.886019][ T9171] connmark_tg_check+0x61/0xe0 [ 85.890789][ T9171] ? connmark_mt_destroy+0x80/0x80 [ 85.895881][ T9171] xt_check_target+0x283/0x690 [ 85.900639][ T9171] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 85.906433][ T9171] ? mutex_unlock+0xd/0x10 [ 85.910826][ T9171] ? xt_find_target+0x73/0x280 [ 85.915582][ T9171] ? xt_find_target+0x73/0x280 [ 85.920329][ T9171] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.926549][ T9171] translate_table+0x1005/0x1d70 [ 85.931467][ T9171] ? arpt_alloc_initial_table+0x690/0x690 [ 85.937166][ T9171] ? lock_downgrade+0x920/0x920 [ 85.942012][ T9171] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.948233][ T9171] ? _copy_from_user+0x12c/0x1a0 [ 85.953167][ T9171] do_arpt_set_ctl+0x310/0x640 [ 85.957926][ T9171] ? __do_replace+0xa80/0xa80 [ 85.962582][ T9171] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 85.968113][ T9171] ? ___might_sleep+0x163/0x2c0 [ 85.972954][ T9171] ? wait_for_completion+0x440/0x440 [ 85.978222][ T9171] ? mutex_unlock+0xd/0x10 [ 85.982622][ T9171] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 85.988582][ T9171] nf_setsockopt+0x77/0xd0 [ 85.993052][ T9171] ip_setsockopt+0xdf/0x100 [ 85.997542][ T9171] udp_setsockopt+0x68/0xb0 [ 86.002035][ T9171] sock_common_setsockopt+0x94/0xd0 [ 86.007218][ T9171] __sys_setsockopt+0x261/0x4c0 [ 86.012049][ T9171] ? sock_create_kern+0x50/0x50 [ 86.016886][ T9171] ? down_read_non_owner+0x490/0x490 [ 86.022167][ T9171] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 86.028433][ T9171] ? handle_mm_fault+0x4ab/0xa50 [ 86.033366][ T9171] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 86.038805][ T9171] ? do_syscall_64+0x26/0x790 [ 86.043478][ T9171] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.049522][ T9171] ? do_syscall_64+0x26/0x790 [ 86.054179][ T9171] __x64_sys_setsockopt+0xbe/0x150 [ 86.059270][ T9171] do_syscall_64+0xfa/0x790 [ 86.063751][ T9171] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.069619][ T9171] RIP: 0033:0x441369 [ 86.073594][ T9171] 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 [ 86.093194][ T9171] RSP: 002b:00007ffed53f1838 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 86.101582][ T9171] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441369 [ 86.109531][ T9171] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 86.117494][ T9171] RBP: 00000000006cb018 R08: 0000000000000418 R09: 00000000004002c8 [ 86.125458][ T9171] R10: 0000000020000880 R11: 0000000000000246 R12: 0000000000402bf0 [ 86.133407][ T9171] R13: 0000000000402c80 R14: 0000000000000000 R15: 0000000000000000 [ 86.141380][ T9171] Modules linked in: [ 86.145585][ T9171] ---[ end trace 86b70d3f20194272 ]--- [ 86.151056][ T9171] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 86.156799][ T9171] Code: 22 22 fb 45 84 f6 0f 84 5c 03 00 00 e8 07 21 22 fb 49 8d bc 24 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 9f 06 00 00 4d 8b b4 24 68 13 00 00 e8 47 59 0e [ 86.176431][ T9171] RSP: 0018:ffffc90001f177a8 EFLAGS: 00010202 [ 86.182476][ T9171] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff86531056 [ 86.190459][ T9171] RDX: 000000000000026d RSI: ffffffff86530ce9 RDI: 0000000000001368 [ 86.198439][ T9171] RBP: ffffc90001f177e8 R08: ffff88808fd96200 R09: ffffed1015d0703d [ 86.206421][ T9171] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 86.214409][ T9171] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 86.222976][ T9171] FS: 00000000009fd880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 86.231930][ T9171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.238527][ T9171] CR2: 00000000200008a0 CR3: 0000000093cc3000 CR4: 00000000001406f0 [ 86.246517][ T9171] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.254511][ T9171] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.262466][ T9171] Kernel panic - not syncing: Fatal exception [ 86.269927][ T9171] Kernel Offset: disabled [ 86.274308][ T9171] Rebooting in 86400 seconds..