------------[ cut here ]------------
!rwb
WARNING: block/blk-wbt.c:785 at wbt_init_enable_default+0x18a/0x220 block/blk-wbt.c:785, CPU#0: syz.6.2819/19221
Modules linked in:
CPU: 0 UID: 0 PID: 19221 Comm: syz.6.2819 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:wbt_init_enable_default+0x18a/0x220 block/blk-wbt.c:785
Code: 1c 84 c0 0f 85 8d 00 00 00 41 21 2e eb 1f e8 6d a0 33 fd eb 18 e8 66 a0 33 fd eb 0d e8 5f a0 33 fd 4c 89 ff e8 77 e1 8d fd 90 <0f> 0b 90 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc
RSP: 0018:ffffc90005fff3f0 EFLAGS: 00010286
RAX: f25eb5646d5c1c00 RBX: 1ffff11012b6fc04 RCX: 0000000000000046
RDX: 0000000000000006 RSI: ffffffff8d5655b5 RDI: ffffffff8ba67a00
RBP: dffffc0000000000 R08: ffffffff8f6a71b7 R09: 1ffffffff1ed4e36
R10: dffffc0000000000 R11: fffffbfff1ed4e37 R12: ffff888095b7e020
R13: 0000000000000000 R14: ffff88804dada000 R15: ffff888095b7e000
FS:  00007f1d5faad6c0(0000) GS:ffff888126335000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000103000 CR3: 0000000071dca000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_register_queue+0x382/0x430 block/blk-sysfs.c:949
 __add_disk+0x677/0xd50 block/genhd.c:528
 add_disk_fwnode+0xfb/0x480 block/genhd.c:597
 add_disk include/linux/blkdev.h:785 [inline]
 loop_add+0x86e/0xb50 drivers/block/loop.c:2092
 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:841
 blkdev_open+0x1f5/0x620 block/fops.c:688
 do_dentry_open+0x83d/0x13e0 fs/open.c:949
 vfs_open+0x3b/0x350 fs/open.c:1081
 do_open fs/namei.c:4677 [inline]
 path_openat+0x2e43/0x38a0 fs/namei.c:4836
 do_file_open+0x23e/0x4a0 fs/namei.c:4865
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d6187c819
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:00007f1d5faad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f1d61af6090 RCX: 00007f1d6187c819
RDX: 0000000000024c01 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007f1d61912c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d61af6128 R14: 00007f1d61af6090 R15: 00007ffe08896878
 </TASK>