0x000000000001-0x0000fffffff1 : ""
mtd: partition "" extends beyond the end of device "mtdram test device" -- size truncated to 0x1ffff
ftl_cs: FTL header corrupt!
------------[ cut here ]------------
wbt_init(disk)
WARNING: block/blk-wbt.c:741 at wbt_init_enable_default+0x53/0x60 block/blk-wbt.c:741, CPU#0: syz.1.3409/13977
Modules linked in:
CPU: 0 UID: 0 PID: 13977 Comm: syz.1.3409 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 7a d8 2e fd 48 89 ef e8 a2 fa ff ff 31 ff 89 c3 89 c6 e8 17 d3 2e fd 85 db 74 d8 e8 5e d8 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:ffffc9000b23f5a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000fffffff4 RCX: ffffffff84d77259
RDX: ffff88802bfddb80 RSI: ffffffff84d77262 RDI: ffff88802bfddb80
RBP: ffff88807e3b3000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000fffffff4 R11: ffffffff8b738149 R12: ffff888029174c40
R13: ffff88807e3b3390 R14: ffff888029174c50 R15: ffff88807e3b3090
FS:  00007fd55be396c0(0000) GS:ffff8881245e3000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e715ff8 CR3: 000000007e5ae000 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: 0033:0x7fd55af9aeb9
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:00007fd55be39028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd55b215fa0 RCX: 00007fd55af9aeb9
RDX: 0000000000000000 RSI: 0000000000001269 RDI: 0000000000000003
RBP: 00007fd55b008c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd55b216038 R14: 00007fd55b215fa0 R15: 00007ffe71400068
 </TASK>