ftl_cs: FTL header not found.
"mq-deadline" elevator initialization, failed -12, falling back to "none"
------------[ cut here ]------------
!rwb
WARNING: block/blk-wbt.c:784 at wbt_init_enable_default+0xcb/0x120 block/blk-wbt.c:784, CPU#0: syz.2.3743/24100
Modules linked in:
CPU: 0 UID: 0 PID: 24100 Comm: syz.2.3743 Tainted: G     U       L      syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:wbt_init_enable_default+0xcb/0x120 block/blk-wbt.c:784
Code: df e8 c9 46 a9 06 4c 89 e7 e8 e1 38 00 00 48 89 df e8 19 d0 a8 06 e8 04 4b 23 fd 5b 5d 41 5c c3 cc cc cc cc e8 f6 4a 23 fd 90 <0f> 0b 90 eb 81 e8 eb 4a 23 fd 90 0f 0b 90 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc90003997590 EFLAGS: 00010287
RAX: 0000000000021548 RBX: ffff888022284000 RCX: ffffc90022fd4000
RDX: 0000000000080000 RSI: ffffffff84e4ae2a RDI: ffffffff8c1ae520
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff82731c04 R12: ffff88802afcc2b8
R13: ffff888022284390 R14: ffff88802afcc2c8 R15: ffff888022284090
FS:  00007fd086eb96c0(0000) GS:ffff888124354000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 000000009bfda000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_register_queue+0x39e/0x4e0 block/blk-sysfs.c:942
 __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+0xb1a/0x17a0 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+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd085f9bf79
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:00007fd086eb9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd086215fa0 RCX: 00007fd085f9bf79
RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000003
RBP: 00007fd0860327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd086216038 R14: 00007fd086215fa0 R15: 00007ffc45688298
 </TASK>