------------[ cut here ]------------
WARNING: block/blk-wbt.c:741 at wbt_init_enable_default+0x4e/0x60 block/blk-wbt.c:741, CPU#0: syz.7.3758/16697
Modules linked in:
CPU: 0 UID: 0 PID: 16697 Comm: syz.7.3758 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:wbt_init_enable_default+0x4e/0x60 block/blk-wbt.c:741
Code: ff 89 c6 e8 64 39 4f fd 85 db 75 18 e8 ab 34 4f fd 5b e9 15 d8 64 06 cc e8 9f 34 4f fd 5b e9 09 d8 64 06 cc e8 93 34 4f fd 90 <0f> 0b 90 5b c3 cc cc cc cc cc 0f 1f 84 00 00 00 00 00 90 90 90 90
RSP: 0018:ffffc9000d53f458 EFLAGS: 00010287
RAX: ffffffff8470779d RBX: 00000000fffffff4 RCX: 0000000000080000
RDX: ffffc9001ea55000 RSI: 00000000000090e7 RDI: 00000000000090e8
RBP: 1ffff1100416501a R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1db668f R12: 0000000000000000
R13: 1ffff11004dbd651 R14: ffff888020b28000 R15: ffff888026deb278
FS:  00007f756945e6c0(0000) GS:ffff888126cef000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7cb41bee9c CR3: 000000002e99c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_register_queue+0x36a/0x3f0 block/blk-sysfs.c:935
 __add_disk+0x677/0xd50 block/genhd.c:528
 add_disk_fwnode+0xfc/0x480 block/genhd.c:597
 add_disk include/linux/blkdev.h:785 [inline]
 loop_add+0x800/0xae0 drivers/block/loop.c:2093
 blk_probe_dev block/genhd.c:884 [inline]
 blk_request_module+0x27d/0x2a0 block/genhd.c:-1
 blkdev_get_no_open+0x3f/0xe0 block/bdev.c:842
 blkdev_open+0x1f0/0x610 block/fops.c:689
 do_dentry_open+0x7d0/0x1270 fs/open.c:962
 vfs_open+0x3b/0x350 fs/open.c:1094
 do_open fs/namei.c:4628 [inline]
 path_openat+0x342a/0x3df0 fs/namei.c:4787
 do_filp_open+0x1fa/0x410 fs/namei.c:4814
 do_sys_openat2+0x121/0x200 fs/open.c:1430
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_creat fs/open.c:1514 [inline]
 __se_sys_creat fs/open.c:1508 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1508
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f756b1ff749
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f756945e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f756b455fa0 RCX: 00007f756b1ff749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007f756b283f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f756b456038 R14: 00007f756b455fa0 R15: 00007ffe540a9208
 </TASK>