INFO: trying to register non-static key in mwifiex_unregister_dev

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit:    69bbe8c7 usb-fuzzer: main usb gadget fuzzer driver
git tree:       https://github.com/google/kasan.git usb-fuzzer
console output: https://syzkaller.appspot.com/x/log.txt?x=1448d0f2a00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=193d8457178b3229
dashboard link: https://syzkaller.appspot.com/bug?extid=373e6719b49912399d21
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16e57ca6a00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1106eda2a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+373e6719b49912399d21@xxxxxxxxxxxxxxxxxxxxxxxxx

usb 1-1: Using ep0 maxpacket: 8
usb 1-1: config 0 has an invalid interface number: 182 but max is 0
usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=1286, idProduct=2052,  
bcdDevice=61.43
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
usb 1-1: Direct firmware load for mrvl/usbusb8997_combo_v4.bin failed with  
error -2
usb 1-1: Failed to get firmware mrvl/usbusb8997_combo_v4.bin
usb 1-1: info: _mwifiex_fw_dpc: unregister device
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 21 Comm: kworker/1:1 Not tainted 5.2.0-rc1+ #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Workqueue: events request_firmware_work_func
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 assign_lock_key kernel/locking/lockdep.c:774 [inline]
 register_lock_class+0x11ae/0x1240 kernel/locking/lockdep.c:1083
 __lock_acquire+0x11d/0x5340 kernel/locking/lockdep.c:3673
 lock_acquire+0x100/0x2b0 kernel/locking/lockdep.c:4302
 del_timer_sync+0x3a/0x130 kernel/time/timer.c:1277
 mwifiex_usb_cleanup_tx_aggr  
drivers/net/wireless/marvell/mwifiex/usb.c:1358 [inline]
 mwifiex_unregister_dev+0x416/0x690  
drivers/net/wireless/marvell/mwifiex/usb.c:1370
 _mwifiex_fw_dpc+0x577/0xda0 drivers/net/wireless/marvell/mwifiex/main.c:651
 request_firmware_work_func+0x126/0x242  
drivers/base/firmware_loader/main.c:785
 process_one_work+0x905/0x1570 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x30b/0x410 kernel/kthread.c:254
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
------------[ cut here ]------------
ODEBUG: assert_init not available (active state 0) object type: timer_list  
hint: 0x0
WARNING: CPU: 1 PID: 21 at lib/debugobjects.c:325  
debug_print_object+0x160/0x250 lib/debugobjects.c:325


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