[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.984459][ T27] audit: type=1800 audit(1577497350.753:25): pid=9172 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.004288][ T27] audit: type=1800 audit(1577497350.763:26): pid=9172 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.047574][ T27] audit: type=1800 audit(1577497350.763:27): pid=9172 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 '10.128.0.131' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.216521][ T9324] kasan: CONFIG_KASAN_INLINE enabled [ 77.221921][ T9324] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 77.230088][ T9324] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 77.237013][ T9324] CPU: 0 PID: 9324 Comm: syz-executor455 Not tainted 5.5.0-rc2-syzkaller #0 [ 77.245764][ T9324] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.255826][ T9324] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 77.261529][ T9324] Code: 91 1f fb 45 84 f6 0f 84 5c 03 00 00 e8 d7 8f 1f fb 49 8d bc 24 a8 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 a8 13 00 00 e8 17 c8 0b [ 77.281112][ T9324] RSP: 0018:ffffc900024677a8 EFLAGS: 00010202 [ 77.287154][ T9324] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff8655a186 [ 77.295102][ T9324] RDX: 0000000000000275 RSI: ffffffff86559e19 RDI: 00000000000013a8 [ 77.303047][ T9324] RBP: ffffc900024677e8 R08: ffff8880a49be080 R09: ffffed1015d0703d [ 77.310993][ T9324] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.318944][ T9324] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 77.326891][ T9324] FS: 0000000000c7b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.335806][ T9324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.342377][ T9324] CR2: 00000000200008a0 CR3: 00000000a7766000 CR4: 00000000001406f0 [ 77.350338][ T9324] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.358288][ T9324] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.366234][ T9324] Call Trace: [ 77.369501][ T9324] ? lock_downgrade+0x920/0x920 [ 77.374328][ T9324] nf_ct_netns_get+0x41/0x150 [ 77.378984][ T9324] connmark_tg_check+0x61/0xe0 [ 77.383735][ T9324] ? connmark_mt_destroy+0x80/0x80 [ 77.388820][ T9324] xt_check_target+0x283/0x690 [ 77.393570][ T9324] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 77.399352][ T9324] ? mutex_unlock+0xd/0x10 [ 77.403946][ T9324] ? xt_find_target+0x73/0x280 [ 77.408703][ T9324] ? xt_find_target+0x73/0x280 [ 77.413447][ T9324] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.419678][ T9324] translate_table+0x1005/0x1d70 [ 77.424593][ T9324] ? arpt_alloc_initial_table+0x690/0x690 [ 77.430292][ T9324] ? lock_downgrade+0x920/0x920 [ 77.435119][ T9324] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.441334][ T9324] ? _copy_from_user+0x12c/0x1a0 [ 77.446257][ T9324] do_arpt_set_ctl+0x310/0x640 [ 77.450996][ T9324] ? __do_replace+0xa80/0xa80 [ 77.455660][ T9324] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 77.461186][ T9324] ? ___might_sleep+0x163/0x2c0 [ 77.466011][ T9324] ? wait_for_completion+0x440/0x440 [ 77.471272][ T9324] ? mutex_unlock+0xd/0x10 [ 77.475665][ T9324] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 77.481635][ T9324] nf_setsockopt+0x77/0xd0 [ 77.486037][ T9324] ip_setsockopt+0xdf/0x100 [ 77.490540][ T9324] udp_setsockopt+0x68/0xb0 [ 77.495025][ T9324] sock_common_setsockopt+0x94/0xd0 [ 77.500205][ T9324] __sys_setsockopt+0x261/0x4c0 [ 77.505035][ T9324] ? sock_create_kern+0x50/0x50 [ 77.509863][ T9324] ? down_read_non_owner+0x490/0x490 [ 77.515141][ T9324] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.521367][ T9324] ? handle_mm_fault+0x4ab/0xa50 [ 77.526288][ T9324] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.531729][ T9324] ? do_syscall_64+0x26/0x790 [ 77.536394][ T9324] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.542439][ T9324] ? do_syscall_64+0x26/0x790 [ 77.547095][ T9324] __x64_sys_setsockopt+0xbe/0x150 [ 77.552203][ T9324] do_syscall_64+0xfa/0x790 [ 77.556693][ T9324] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.567173][ T9324] RIP: 0033:0x441369 [ 77.571047][ T9324] 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 [ 77.590632][ T9324] RSP: 002b:00007ffe57a4ed58 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 77.599021][ T9324] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441369 [ 77.606968][ T9324] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 77.614916][ T9324] RBP: 00000000006cb018 R08: 0000000000000418 R09: 00000000004002c8 [ 77.622874][ T9324] R10: 0000000020000880 R11: 0000000000000246 R12: 0000000000402bf0 [ 77.630843][ T9324] R13: 0000000000402c80 R14: 0000000000000000 R15: 0000000000000000 [ 77.638798][ T9324] Modules linked in: [ 77.643206][ T9324] ---[ end trace 1c042cb19e6cfb74 ]--- [ 77.648683][ T9324] RIP: 0010:nf_ct_netns_do_get+0xd2/0x7e0 [ 77.654381][ T9324] Code: 91 1f fb 45 84 f6 0f 84 5c 03 00 00 e8 d7 8f 1f fb 49 8d bc 24 a8 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 a8 13 00 00 e8 17 c8 0b [ 77.674021][ T9324] RSP: 0018:ffffc900024677a8 EFLAGS: 00010202 [ 77.680110][ T9324] RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffffff8655a186 [ 77.688109][ T9324] RDX: 0000000000000275 RSI: ffffffff86559e19 RDI: 00000000000013a8 [ 77.696075][ T9324] RBP: ffffc900024677e8 R08: ffff8880a49be080 R09: ffffed1015d0703d [ 77.704110][ T9324] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 0000000000000000 [ 77.712269][ T9324] R13: 000000000000002a R14: 0000000000000001 R15: 0000000000000003 [ 77.720280][ T9324] FS: 0000000000c7b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.729230][ T9324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.735792][ T9324] CR2: 00000000200008a0 CR3: 00000000a7766000 CR4: 00000000001406f0 [ 77.743823][ T9324] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.751813][ T9324] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.759805][ T9324] Kernel panic - not syncing: Fatal exception [ 77.768567][ T9324] Kernel Offset: disabled [ 77.772892][ T9324] Rebooting in 86400 seconds..