blk-mq: reduced tag depth (128 -> 64)
------------[ cut here ]------------
wbt_init(disk)
WARNING: block/blk-wbt.c:741 at wbt_init_enable_default+0x53/0x60 block/blk-wbt.c:741, CPU#1: syz.1.9516/25173
Modules linked in:
CPU: 1 UID: 0 PID: 25173 Comm: syz.1.9516 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:wbt_init_enable_default+0x53/0x60 block/blk-wbt.c:741
Code: fd 5b 5d c3 cc cc cc cc e8 5a d3 2e fd 48 89 ef e8 a2 fa ff ff 31 ff 89 c3 89 c6 e8 f7 cd 2e fd 85 db 74 d8 e8 3e d3 2e fd 90 <0f> 0b 90 eb cd 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003c8fb80 EFLAGS: 00010246
RAX: 0000000000080000 RBX: 00000000fffffff4 RCX: ffffc9000c078000
RDX: 0000000000080000 RSI: ffffffff84d77b22 RDI: ffff8880302e3d00
RBP: ffff8880928fd000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: ffffffff81000130 R12: ffff888029929c98
R13: ffff8880928fd390 R14: ffff888029929ca8 R15: ffff8880928fd090
FS:  00007f5c8dfee6c0(0000) GS:ffff8881246e2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7ab7e2d58 CR3: 00000000aa8bc000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_register_queue+0x39e/0x4e0 block/blk-sysfs.c:935
 __add_disk+0x73f/0xe40 block/genhd.c:528
 add_disk_fwnode+0x118/0x5c0 block/genhd.c:597
 add_disk include/linux/blkdev.h:785 [inline]
 loop_add+0x90b/0xb60 drivers/block/loop.c:2093
 loop_control_ioctl+0xae/0x620 drivers/block/loop.c:2220
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c8fd9af79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5c8dfee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5c90015fa0 RCX: 00007f5c8fd9af79
RDX: fffffffffffffffd RSI: 0000000000004c80 RDI: 0000000000000005
RBP: 00007f5c8fe316e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5c90016038 R14: 00007f5c90015fa0 R15: 00007ffe12e51338
 </TASK>