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BUG: KASAN: use-after-free in p54u_load_firmware_cb.cold+0x97/0x13d drivers/net/wireless/intersil/p54/p54usb.c:936
Read of size 8 at addr ffff8881cc23b588 by task kworker/1:1/21

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
 print_address_description+0x67/0x231 mm/kasan/report.c:188
 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:317
 kasan_report+0xe/0x20 mm/kasan/common.c:614
 p54u_load_firmware_cb.cold+0x97/0x13d drivers/net/wireless/intersil/p54/p54usb.c:936
 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

The buggy address belongs to the page:
page:ffffea0007308ec0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x200000000000000()
raw: 0200000000000000 0000000000000000 ffffffff07300101 0000000000000000
raw: 0000000000000000 00000000000c0000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cc23b480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881cc23b500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881cc23b580: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                      ^
 ffff8881cc23b600: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881cc23b680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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