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BUG: KASAN: use-after-free in __lock_acquire+0xfe/0x6100 kernel/locking/lockdep.c:4885
Read of size 8 at addr ffff888031614e28 by task kworker/1:7/9765

CPU: 1 PID: 9765 Comm: kworker/1:7 Not tainted 5.14.0-rc4-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:88 [inline]
 dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:105
 print_address_description+0x66/0x3b0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x163/0x210 mm/kasan/report.c:436
 __lock_acquire+0xfe/0x6100 kernel/locking/lockdep.c:4885
 lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
 _raw_spin_lock_irq+0xae/0xf0 kernel/locking/spinlock.c:167
 do_wait_for_common+0x2e5/0x480 kernel/sched/completion.c:86
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 r871xu_dev_remove+0x83/0x460 drivers/staging/rtl8712/usb_intf.c:599
 usb_unbind_interface+0x1f2/0x860 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1201 [inline]
 device_release_driver_internal+0x51e/0x7b0 drivers/base/dd.c:1232
 bus_remove_device+0x2fd/0x410 drivers/base/bus.c:529
 device_del+0x6e1/0xc10 drivers/base/core.c:3542
 usb_disable_device+0x407/0x800 drivers/usb/core/message.c:1419
 usb_disconnect+0x33a/0x8a0 drivers/usb/core/hub.c:2225
 hub_port_connect+0x297/0x27a0 drivers/usb/core/hub.c:5199
 hub_port_connect_change+0x5d0/0xbf0 drivers/usb/core/hub.c:5488
 port_event+0xaee/0x1140 drivers/usb/core/hub.c:5634
 hub_event+0x48d/0xd80 drivers/usb/core/hub.c:5716
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0xe28/0x1320 kernel/workqueue.c:2424
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

The buggy address belongs to the page:
page:ffffea0000c58500 refcount:0 mapcount:0 mapping:0000000000000000 index:0x2 pfn:0x31614
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x46dc0(GFP_KERNEL|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_COMP|__GFP_ZERO), pid 9765, ts 181180191377, free_ts 181692911083
 prep_new_page mm/page_alloc.c:2436 [inline]
 get_page_from_freelist+0x779/0xa30 mm/page_alloc.c:4169
 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5391
 __alloc_pages_node include/linux/gfp.h:570 [inline]
 alloc_pages_node include/linux/gfp.h:584 [inline]
 kmalloc_large_node+0x7c/0x170 mm/slub.c:4126
 __kmalloc_node+0x352/0x430 mm/slub.c:4142
 kmalloc_node include/linux/slab.h:614 [inline]
 kvmalloc_node+0x81/0xf0 mm/util.c:587
 kvmalloc include/linux/mm.h:806 [inline]
 kvzalloc include/linux/mm.h:814 [inline]
 alloc_netdev_mqs+0x85/0xc10 net/core/dev.c:10844
 r8712_init_netdev+0x1f/0x970 drivers/staging/rtl8712/os_intfs.c:202
 r871xu_drv_init+0xb0/0x1f50 drivers/staging/rtl8712/usb_intf.c:361
 usb_probe_interface+0x633/0xb40 drivers/usb/core/driver.c:396
 call_driver_probe+0x96/0x250 drivers/base/dd.c:517
 really_probe+0x223/0x9c0 drivers/base/dd.c:595
 __driver_probe_device+0x1f8/0x3e0 drivers/base/dd.c:747
 driver_probe_device+0x50/0x240 drivers/base/dd.c:777
 __device_attach_driver+0x1e1/0x3b0 drivers/base/dd.c:894
 bus_for_each_drv+0x16a/0x1f0 drivers/base/bus.c:427
 __device_attach+0x301/0x560 drivers/base/dd.c:965
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1346 [inline]
 free_pcp_prepare+0xc29/0xd20 mm/page_alloc.c:1397
 free_unref_page_prepare mm/page_alloc.c:3332 [inline]
 free_unref_page+0x7e/0x550 mm/page_alloc.c:3411
 free_nonslab_page+0xe1/0x150 mm/slub.c:3246
 kfree+0x1bc/0x1f0 mm/slub.c:4261
 request_firmware_work_func+0x175/0x250 drivers/base/firmware_loader/main.c:1081
 process_one_work+0x833/0x10c0 kernel/workqueue.c:2276
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2422
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Memory state around the buggy address:
 ffff888031614d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888031614d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888031614e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                  ^
 ffff888031614e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888031614f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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