device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.214-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net task: ffff8880b5ff2140 task.stack: ffff8880b5ff8000 RIP: 0010:qfq_reset_qdisc+0x143/0x490 net/sched/sch_qfq.c:1463 RSP: 0018:ffff8880b5fff9b8 EFLAGS: 00010202 RAX: 0000000000000013 RBX: ffff8880a05a6c00 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffff888057f48a80 RDI: 0000000000000098 RBP: dffffc0000000000 R08: ffff8880b5ff2140 R09: dffffc0000000000 R10: 0000000000000000 R11: ffff8880b5ff2140 R12: 0000000000000000 R13: ffff8880a05a6c48 R14: ffffed10146994f0 R15: ffff888057f48a80 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c02c32d000 CR3: 000000009dc7d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: qdisc_destroy+0x104/0x310 net/sched/sch_generic.c:724 dev_shutdown+0x27a/0x43e net/sched/sch_generic.c:1001 rollback_registered_many+0x73a/0xba0 net/core/dev.c:7197 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8285 unregister_netdevice_many net/core/dev.c:8284 [inline] default_device_exit_batch+0x2d8/0x380 net/core/dev.c:8746 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:145 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 73 5f fb 4c 8d 6b 48 4c 89 e8 48 c1 e8 03 80 3c 28 00 0f 85 41 02 00 00 4c 8b 63 48 49 8d bc 24 98 00 00 00 48 89 f8 48 c1 e8 03 <0f> b6 04 28 84 c0 74 08 3c 03 0f 8e 35 02 00 00 41 8b 84 24 98 RIP: qfq_reset_qdisc+0x143/0x490 net/sched/sch_qfq.c:1463 RSP: ffff8880b5fff9b8 ---[ end trace 1201e69eec0e9e0d ]---