BUG: memory leak
unreferenced object 0xffff88811f1706c0 (size 32):
  comm "syz-executor.0", pid 6676, jiffies 4294946395 (age 14.000s)
  hex dump (first 32 bytes):
    b8 06 17 1f 81 88 ff ff 60 b4 15 1f 81 88 ff ff  ........`.......
    80 ee 85 83 ff ff ff ff 01 00 00 00 02 00 00 00  ................
  backtrace:
    [<00000000e7d86de0>] erase_aeb+0x25/0x110 drivers/mtd/ubi/wl.c:1690
    [<000000005ae12c39>] ubi_wl_init+0x193/0x5c0 drivers/mtd/ubi/wl.c:1757
    [<000000002528b114>] ubi_attach+0x611/0x18ba drivers/mtd/ubi/attach.c:1605
    [<000000005d01ae92>] ubi_attach_mtd_dev+0x665/0xcc0 drivers/mtd/ubi/build.c:967
    [<00000000b9f456ed>] ctrl_cdev_ioctl+0x144/0x1b0 drivers/mtd/ubi/cdev.c:1043
    [<00000000e97988aa>] vfs_ioctl fs/ioctl.c:47 [inline]
    [<00000000e97988aa>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:771
    [<00000000d06779ef>] __do_sys_ioctl fs/ioctl.c:780 [inline]
    [<00000000d06779ef>] __se_sys_ioctl fs/ioctl.c:778 [inline]
    [<00000000d06779ef>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:778
    [<000000000f0891bb>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:295
    [<0000000051a8678e>] entry_SYSCALL_64_after_hwframe+0x44/0xa9