ftl_cs: FTL header not found.
------------[ 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.2.4490/25742
Modules linked in:
CPU: 1 UID: 0 PID: 25742 Comm: syz.2.4490 Tainted: G     U       L      syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER, [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 aa 78 2b fd 48 89 ef e8 a2 fa ff ff 31 ff 89 c3 89 c6 e8 47 73 2b fd 85 db 74 d8 e8 8e 78 2b 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: 0000:ffffc9001095f5a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000fffffff4 RCX: ffffffff84dad7c9
RDX: ffff8880316f1e40 RSI: ffffffff84dad7d2 RDI: ffff8880316f1e40
RBP: ffff8880351ee000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: ffffffff8b76e149 R12: ffff88802a082620
R13: ffff8880351ee390 R14: ffff88802a082630 R15: ffff8880351ee090
FS:  00007f0fa4ff66c0(0000) GS:ffff8881246c4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e9fcff8 CR3: 000000007a982000 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_mtd_blktrans_dev+0xd0b/0x1520 drivers/mtd/mtd_blkdevs.c:382
 mtdblock_add_mtd+0x1cc/0x270 drivers/mtd/mtdblock.c:333
 blktrans_notify_add drivers/mtd/mtd_blkdevs.c:464 [inline]
 blktrans_notify_add+0xa2/0xf0 drivers/mtd/mtd_blkdevs.c:456
 add_mtd_device+0xbe3/0x1750 drivers/mtd/mtdcore.c:820
 mtd_add_partition+0x30a/0x660 drivers/mtd/mtdpart.c:279
 mtdchar_blkpg_ioctl+0x207/0x250 drivers/mtd/mtdchar.c:562
 mtdchar_ioctl+0x1670/0x1fd0 drivers/mtd/mtdchar.c:1218
 mtdchar_unlocked_ioctl+0xb0/0xf0 drivers/mtd/mtdchar.c:1241
 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: 0033:0x7f0fa6d9af79
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:00007f0fa4ff6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0fa7016270 RCX: 00007f0fa6d9af79
RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000004
RBP: 00007f0fa6e316e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0fa7016308 R14: 00007f0fa7016270 R15: 00007ffdd1e50908
 </TASK>