"mq-deadline" elevator initialization, failed -12, falling back to "none"
------------[ cut here ]------------
!rwb
WARNING: block/blk-wbt.c:785 at wbt_init_enable_default+0x164/0x1c0 block/blk-wbt.c:785, CPU#0: syz.0.905/10358
Modules linked in:
CPU: 0 UID: 0 PID: 10358 Comm: syz.0.905 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:wbt_init_enable_default+0x164/0x1c0 block/blk-wbt.c:785
Code: 14 22 fd 5b 5d 41 5c 41 5d 41 5e e9 c6 87 aa 06 4c 89 f7 e8 ee 9f 8d fd eb 83 4c 89 f7 e8 e4 9f 8d fd eb d0 e8 2d 14 22 fd 90 <0f> 0b 90 e9 e9 fe ff ff e8 1f 14 22 fd 90 0f 0b 90 48 b8 00 00 00
RSP: 0018:ffffc900033b7570 EFLAGS: 00010283
RAX: 00000000000220a7 RBX: ffff888022f00000 RCX: ffffc9000d6a1000
RDX: 0000000000080000 RSI: ffffffff84e60433 RDI: ffffffff8c1b06a0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff827373a4 R12: ffff88802b3c1c98
R13: ffff88807b813d2c R14: ffff888022f00390 R15: ffff88802b3c1ca8
FS:  00007fcc3c4766c0(0000) GS:ffff88812434a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555561d359e8 CR3: 0000000078092000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 blk_register_queue+0x42c/0x590 block/blk-sysfs.c:949
 __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: 0033:0x7fcc3b59c799
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:00007fcc3c476028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcc3b816090 RCX: 00007fcc3b59c799
RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000003
RBP: 00007fcc3b632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc3b816128 R14: 00007fcc3b816090 R15: 00007ffc03ac72f8
 </TASK>