[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.446957][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 62.446966][ T26] audit: type=1800 audit(1568552807.963:29): pid=9671 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 62.473579][ T26] audit: type=1800 audit(1568552807.973:30): pid=9671 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.51' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.406125][ T9824] IPVS: ftp: loaded support on port[0] = 21 [ 70.428243][ T9824] kasan: CONFIG_KASAN_INLINE enabled [ 70.433753][ T9824] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 70.442039][ T9824] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 70.448962][ T9824] CPU: 0 PID: 9824 Comm: syz-executor603 Not tainted 5.3.0-rc8+ #0 [ 70.456841][ T9824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.466888][ T9824] RIP: 0010:__list_del_entry_valid+0x85/0xf5 [ 70.472978][ T9824] Code: 0f 84 e1 00 00 00 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 e2 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 53 49 8b 14 24 4c 39 f2 0f 85 99 00 00 00 49 8d 7d [ 70.493041][ T9824] RSP: 0018:ffff8880920e7450 EFLAGS: 00010246 [ 70.499556][ T9824] RAX: dffffc0000000000 RBX: ffff8880968f4480 RCX: ffffffff8159c28a [ 70.507602][ T9824] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880968f47e8 [ 70.515647][ T9824] RBP: ffff8880920e7468 R08: 0000000000000004 R09: ffffed101241ce7d [ 70.523696][ T9824] R10: ffffed101241ce7c R11: 0000000000000003 R12: 0000000000000000 [ 70.531730][ T9824] R13: 0000000000000000 R14: ffff8880968f47e0 R15: ffff8880968f4740 [ 70.539677][ T9824] FS: 0000555556c9d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 70.548600][ T9824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.555259][ T9824] CR2: 00000000200001c0 CR3: 00000000a4d76000 CR4: 00000000001406f0 [ 70.563228][ T9824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.571187][ T9824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.580786][ T9824] Call Trace: [ 70.584098][ T9824] cbs_destroy+0x7d/0x2a0 [ 70.588408][ T9824] ? cbs_init+0x25d/0x450 [ 70.592715][ T9824] ? cbs_dequeue_soft+0x410/0x410 [ 70.597718][ T9824] qdisc_create+0xbc6/0x1210 [ 70.602282][ T9824] ? tc_get_qdisc+0xc10/0xc10 [ 70.606941][ T9824] ? __nla_parse+0x43/0x60 [ 70.611347][ T9824] tc_modify_qdisc+0x524/0x1c50 [ 70.616172][ T9824] ? qdisc_create+0x1210/0x1210 [ 70.621000][ T9824] ? rtnetlink_rcv_msg+0x1ea/0xb00 [ 70.626102][ T9824] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.632407][ T9824] ? qdisc_create+0x1210/0x1210 [ 70.637952][ T9824] rtnetlink_rcv_msg+0x463/0xb00 [ 70.643057][ T9824] ? rtnetlink_put_metrics+0x580/0x580 [ 70.648497][ T9824] ? lock_downgrade+0x920/0x920 [ 70.653322][ T9824] ? netlink_remove_tap+0x4d0/0x4d0 [ 70.658497][ T9824] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 70.664293][ T9824] netlink_rcv_skb+0x177/0x450 [ 70.669045][ T9824] ? rtnetlink_put_metrics+0x580/0x580 [ 70.674569][ T9824] ? netlink_ack+0xb30/0xb30 [ 70.679150][ T9824] ? lock_downgrade+0x920/0x920 [ 70.683991][ T9824] ? netlink_deliver_tap+0x254/0xbf0 [ 70.689283][ T9824] rtnetlink_rcv+0x1d/0x30 [ 70.693673][ T9824] netlink_unicast+0x531/0x710 [ 70.698417][ T9824] ? netlink_attachskb+0x7c0/0x7c0 [ 70.703607][ T9824] ? _copy_from_iter_full+0x25d/0x8a0 [ 70.709087][ T9824] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.714795][ T9824] ? __check_object_size+0x3d/0x437 [ 70.719994][ T9824] netlink_sendmsg+0x8a5/0xd60 [ 70.724841][ T9824] ? netlink_unicast+0x710/0x710 [ 70.729768][ T9824] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.735492][ T9824] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.740935][ T9824] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.747235][ T9824] ? security_socket_sendmsg+0x8d/0xc0 [ 70.752666][ T9824] ? netlink_unicast+0x710/0x710 [ 70.757600][ T9824] sock_sendmsg+0xd7/0x130 [ 70.762122][ T9824] ___sys_sendmsg+0x803/0x920 [ 70.766785][ T9824] ? copy_msghdr_from_user+0x440/0x440 [ 70.772240][ T9824] ? lock_downgrade+0x920/0x920 [ 70.777136][ T9824] ? rwlock_bug.part.0+0x90/0x90 [ 70.782252][ T9824] ? __kasan_check_read+0x11/0x20 [ 70.787271][ T9824] ? lock_downgrade+0x920/0x920 [ 70.792124][ T9824] ? __might_fault+0xfb/0x1e0 [ 70.796785][ T9824] ? __kasan_check_read+0x11/0x20 [ 70.801801][ T9824] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.808027][ T9824] ? __fget_light+0x1a9/0x230 [ 70.812860][ T9824] ? __fdget+0x1b/0x20 [ 70.816905][ T9824] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.823125][ T9824] __sys_sendmsg+0x105/0x1d0 [ 70.827699][ T9824] ? __sys_sendmsg_sock+0xd0/0xd0 [ 70.832697][ T9824] ? down_read_non_owner+0x450/0x450 [ 70.837956][ T9824] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.844425][ T9824] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 70.850475][ T9824] __x64_sys_sendmsg+0x78/0xb0 [ 70.855230][ T9824] do_syscall_64+0xfd/0x6a0 [ 70.859713][ T9824] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.865580][ T9824] RIP: 0033:0x440c69 [ 70.869460][ T9824] 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 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 70.889038][ T9824] RSP: 002b:00007ffedf8d4328 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 70.897522][ T9824] RAX: ffffffffffffffda RBX: 00000000004a23f0 RCX: 0000000000440c69 [ 70.905727][ T9824] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 70.913674][ T9824] RBP: 00000000006cb018 R08: 0000000120080522 R09: 0000000120080522 [ 70.921707][ T9824] R10: 0000000120080522 R11: 0000000000000246 R12: 0000000000402170 [ 70.929655][ T9824] R13: 0000000000402200 R14: 0000000000000000 R15: 0000000000000000 [ 70.937603][ T9824] Modules linked in: [ 70.941601][ T9824] ---[ end trace bf8eb0a310cae1a9 ]--- [ 70.947674][ T9824] RIP: 0010:__list_del_entry_valid+0x85/0xf5 [ 70.953683][ T9824] Code: 0f 84 e1 00 00 00 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 e2 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 53 49 8b 14 24 4c 39 f2 0f 85 99 00 00 00 49 8d 7d [ 70.973510][ T9824] RSP: 0018:ffff8880920e7450 EFLAGS: 00010246 [ 70.979688][ T9824] RAX: dffffc0000000000 RBX: ffff8880968f4480 RCX: ffffffff8159c28a [ 70.987650][ T9824] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880968f47e8 [ 70.995643][ T9824] RBP: ffff8880920e7468 R08: 0000000000000004 R09: ffffed101241ce7d [ 71.003635][ T9824] R10: ffffed101241ce7c R11: 0000000000000003 R12: 0000000000000000 [ 71.011616][ T9824] R13: 0000000000000000 R14: ffff8880968f47e0 R15: ffff8880968f4740 [ 71.019605][ T9824] FS: 0000555556c9d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 71.028520][ T9824] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.035123][ T9824] CR2: 00000000200001c0 CR3: 00000000a4d76000 CR4: 00000000001406f0 [ 71.043104][ T9824] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.051078][ T9824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.059058][ T9824] Kernel panic - not syncing: Fatal exception [ 71.065787][ T9824] Kernel Offset: disabled [ 71.070111][ T9824] Rebooting in 86400 seconds..