==================================================================
BUG: KASAN: global-out-of-bounds in dev_name include/linux/device.h:932 [inline]
BUG: KASAN: global-out-of-bounds in __dev_printk+0x43/0x100 drivers/base/core.c:5019
Read of size 8 at addr ffffffff8c3db590 by task kworker/3:5/5851

CPU: 3 UID: 0 PID: 5851 Comm: kworker/3:5 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 dev_name include/linux/device.h:932 [inline]
 __dev_printk+0x43/0x100 drivers/base/core.c:5019
 _dev_err+0xef/0x127 drivers/base/core.c:5062
 uea_upload_pre_firmware.cold+0x80/0xfa drivers/usb/atm/ueagle-atm.c:606
 request_firmware_work_func+0x13f/0x440 drivers/base/firmware_loader/main.c:1164
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to the variable:
 io_uring_pp_zc_ops+0x590/0x1be0

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc3db
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea000030f6c8 ffffea000030f6c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8c3db480: 00 06 f9 f9 f9 f9 f9 f9 00 03 f9 f9 f9 f9 f9 f9
 ffffffff8c3db500: 00 01 f9 f9 f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9
>ffffffff8c3db580: 00 04 f9 f9 f9 f9 f9 f9 00 00 00 00 06 f9 f9 f9
                         ^
 ffffffff8c3db600: f9 f9 f9 f9 00 00 00 00 02 f9 f9 f9 f9 f9 f9 f9
 ffffffff8c3db680: 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
==================================================================