syzbot

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WARNING: CPU: 1 PID: 69 at net/core/dev.c:8932 rollback_registered_many+0x1ed/0xec0 net/core/dev.c:8932
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 69 Comm: kworker/1:2 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 panic+0x2aa/0x6e1 kernel/panic.c:231
 __warn.cold+0x2f/0x35 kernel/panic.c:600
 report_bug+0x271/0x2f0 lib/bug.c:198
 exc_invalid_op+0x1e4/0x370 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:rollback_registered_many+0x1ed/0xec0 net/core/dev.c:8932
Code: 05 00 00 31 ff 44 89 fe e8 20 47 6f fc 45 84 ff 0f 85 49 ff ff ff e8 b2 45 6f fc 0f 1f 44 00 00 e8 a8 45 6f fc e8 a3 45 6f fc <0f> 0b 48 89 ef e8 e9 d2 1b fd 31 ff 89 c5 89 c6 e8 ee 46 6f fc 40
RSP: 0018:ffff8881d5987620 EFLAGS: 00010293
RAX: ffff8881d6f64b00 RBX: ffff8881cd370000 RCX: ffffffff84d02960
RDX: 0000000000000000 RSI: ffffffff84d0297d RDI: 0000000000000001
RBP: ffff8881cd370068 R08: ffff8881d6f64b00 R09: fffffbfff0f8d691
R10: ffffffff87c6b487 R11: fffffbfff0f8d690 R12: ffff8881d5987768
R13: dffffc0000000000 R14: ffff8881d5987700 R15: 0000000000000000
 rollback_registered+0xf2/0x1c0 net/core/dev.c:9011
 unregister_netdevice_queue net/core/dev.c:10085 [inline]
 unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:10078
 unregister_netdevice include/linux/netdevice.h:2754 [inline]
 unregister_netdev+0x18/0x20 net/core/dev.c:10126
 r871xu_dev_remove+0xe2/0x215 drivers/staging/rtl8712/usb_intf.c:604
 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:436
 __device_release_driver drivers/base/dd.c:1113 [inline]
 device_release_driver_internal+0x432/0x500 drivers/base/dd.c:1144
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
 device_del+0x481/0xd30 drivers/base/core.c:2857
 usb_disable_device+0x23d/0x790 drivers/usb/core/message.c:1245
 usb_disconnect+0x293/0x900 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x1abf/0x43c0 drivers/usb/core/hub.c:5576
 process_one_work+0x965/0x1620 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe10 kernel/workqueue.c:2417
 kthread+0x352/0x460 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled