==================================================================
BUG: KASAN: use-after-free in io_cqring_wait+0x1681/0x1700
Read of size 4 at addr ffff888042800008 by task syz-executor.4/8158

CPU: 1 UID: 0 PID: 8158 Comm: syz-executor.4 Not tainted 6.12.0-next-20241127 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 print_report+0xcb/0x620
 kasan_report+0xbd/0xf0
 io_cqring_wait+0x1681/0x1700
 __do_sys_io_uring_enter+0xf12/0x15b0
 do_syscall_64+0xbf/0x1d0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1193c54b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f11911a9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f1193d68020 RCX: 00007f1193c54b19
RDX: 000000000000f543 RSI: 0000000000003e7c RDI: 0000000000000003
RBP: 00007f1193caef6d R08: 0000000020000040 R09: 0000000000000008
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc7c3a33af R14: 00007f11911a9300 R15: 0000000000022000
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x42800
flags: 0x100000000000000(node=0|zone=1)
page_type: f0(buddy)
raw: 0100000000000000 ffffea0001098008 ffffea0001080008 0000000000000000
raw: 0000000000000000 0000000000000009 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880427fff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880427fff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888042800000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                      ^
 ffff888042800080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888042800100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
audit: type=1400 audit(1732771663.807:15): avc:  denied  { block_suspend } for  pid=8181 comm="syz-executor.2" capability=36  scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Bluetooth: hci7: ISO packet for unknown connection handle 0
Bluetooth: hci7: ISO packet for unknown connection handle 0
Bluetooth: hci7: command tx timeout
Bluetooth: hci7: command tx timeout