[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.489749][ T27] audit: type=1800 audit(1577497606.984:25): pid=8992 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.518161][ T27] audit: type=1800 audit(1577497606.984:26): pid=8992 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.567418][ T27] audit: type=1800 audit(1577497606.994:27): pid=8992 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 '10.128.0.119' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.491225][ T9150] kasan: CONFIG_KASAN_INLINE enabled [ 77.496567][ T9150] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 77.504660][ T9150] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 77.511736][ T9150] CPU: 0 PID: 9150 Comm: syz-executor281 Not tainted 5.5.0-rc3-syzkaller #0 [ 77.520436][ T9150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.530479][ T9150] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 77.536219][ T9150] 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 [ 77.555824][ T9150] RSP: 0018:ffffc90001ce77a8 EFLAGS: 00010202 [ 77.561868][ T9150] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff86531056 [ 77.569827][ T9150] RDX: 000000000000026d RSI: ffffffff86530ce9 RDI: 0000000000001368 [ 77.577772][ T9150] RBP: ffffc90001ce77e8 R08: ffff888095c76100 R09: ffffed1015d0703d [ 77.585718][ T9150] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.593663][ T9150] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 77.601657][ T9150] FS: 00000000019db880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.610589][ T9150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.617194][ T9150] CR2: 00000000200008a0 CR3: 00000000a7e7c000 CR4: 00000000001406f0 [ 77.625207][ T9150] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.633162][ T9150] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.641115][ T9150] Call Trace: [ 77.644386][ T9150] ? lock_downgrade+0x920/0x920 [ 77.649213][ T9150] nf_ct_netns_get+0x41/0x150 [ 77.653877][ T9150] connmark_tg_check+0x61/0xe0 [ 77.658618][ T9150] ? connmark_mt_destroy+0x80/0x80 [ 77.663711][ T9150] xt_check_target+0x283/0x690 [ 77.668465][ T9150] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 77.674258][ T9150] ? mutex_unlock+0xd/0x10 [ 77.678658][ T9150] ? xt_find_target+0x73/0x280 [ 77.683407][ T9150] ? xt_find_target+0x73/0x280 [ 77.688178][ T9150] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.694400][ T9150] translate_table+0x1005/0x1d70 [ 77.699322][ T9150] ? arpt_alloc_initial_table+0x690/0x690 [ 77.705018][ T9150] ? lock_downgrade+0x920/0x920 [ 77.709854][ T9150] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.719806][ T9150] ? _copy_from_user+0x12c/0x1a0 [ 77.724719][ T9150] do_arpt_set_ctl+0x310/0x640 [ 77.729460][ T9150] ? __do_replace+0xa80/0xa80 [ 77.734154][ T9150] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 77.739716][ T9150] ? ___might_sleep+0x163/0x2c0 [ 77.744542][ T9150] ? wait_for_completion+0x440/0x440 [ 77.749805][ T9150] ? mutex_unlock+0xd/0x10 [ 77.754211][ T9150] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 77.760174][ T9150] nf_setsockopt+0x77/0xd0 [ 77.764579][ T9150] ip_setsockopt+0xdf/0x100 [ 77.769066][ T9150] udp_setsockopt+0x68/0xb0 [ 77.773549][ T9150] sock_common_setsockopt+0x94/0xd0 [ 77.778726][ T9150] __sys_setsockopt+0x261/0x4c0 [ 77.783570][ T9150] ? sock_create_kern+0x50/0x50 [ 77.788410][ T9150] ? down_read_non_owner+0x490/0x490 [ 77.793686][ T9150] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.799946][ T9150] ? handle_mm_fault+0x4ab/0xa50 [ 77.804866][ T9150] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.811039][ T9150] ? do_syscall_64+0x26/0x790 [ 77.815697][ T9150] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.821743][ T9150] ? do_syscall_64+0x26/0x790 [ 77.826418][ T9150] __x64_sys_setsockopt+0xbe/0x150 [ 77.831509][ T9150] do_syscall_64+0xfa/0x790 [ 77.835995][ T9150] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.841863][ T9150] RIP: 0033:0x441369 [ 77.845739][ T9150] 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 [ 77.865320][ T9150] RSP: 002b:00007ffcd56653b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 77.873708][ T9150] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441369 [ 77.881659][ T9150] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 77.889645][ T9150] RBP: 00000000006cb018 R08: 0000000000000418 R09: 00000000004002c8 [ 77.897592][ T9150] R10: 0000000020000880 R11: 0000000000000246 R12: 0000000000402bf0 [ 77.905572][ T9150] R13: 0000000000402c80 R14: 0000000000000000 R15: 0000000000000000 [ 77.913520][ T9150] Modules linked in: [ 77.918200][ T9150] ---[ end trace 59251aa1113b979f ]--- [ 77.923663][ T9150] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 77.929401][ T9150] 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 [ 77.949024][ T9150] RSP: 0018:ffffc90001ce77a8 EFLAGS: 00010202 [ 77.955068][ T9150] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff86531056 [ 77.963054][ T9150] RDX: 000000000000026d RSI: ffffffff86530ce9 RDI: 0000000000001368 [ 77.971037][ T9150] RBP: ffffc90001ce77e8 R08: ffff888095c76100 R09: ffffed1015d0703d [ 77.979013][ T9150] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.986984][ T9150] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 77.994968][ T9150] FS: 00000000019db880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 78.003903][ T9150] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.010498][ T9150] CR2: 00000000200008a0 CR3: 00000000a7e7c000 CR4: 00000000001406f0 [ 78.018497][ T9150] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.026459][ T9150] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.034439][ T9150] Kernel panic - not syncing: Fatal exception [ 78.041636][ T9150] Kernel Offset: disabled [ 78.045972][ T9150] Rebooting in 86400 seconds..