BUG: memory leak
unreferenced object 0xffff888127f6ec20 (size 32):
  comm "syz-executor.0", pid 6915, jiffies 4294946918 (age 15.510s)
  hex dump (first 32 bytes):
    00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de  ........".......
    00 00 00 00 00 00 00 00 01 00 00 00 02 00 00 00  ................
  backtrace:
    [<00000000046ec645>] erase_aeb+0x25/0x110 drivers/mtd/ubi/wl.c:1690
    [<00000000a1ff4d1c>] ubi_wl_init+0x193/0x5c0 drivers/mtd/ubi/wl.c:1757
    [<000000005a27ff55>] ubi_attach+0x611/0x18ba drivers/mtd/ubi/attach.c:1605
    [<00000000fe4eb7b8>] ubi_attach_mtd_dev+0x584/0xca0 drivers/mtd/ubi/build.c:967
    [<0000000003b7e223>] ctrl_cdev_ioctl+0x143/0x1b0 drivers/mtd/ubi/cdev.c:1043
    [<000000002e4c32ce>] vfs_ioctl fs/ioctl.c:47 [inline]
    [<000000002e4c32ce>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763
    [<00000000d0501578>] __do_sys_ioctl fs/ioctl.c:772 [inline]
    [<00000000d0501578>] __se_sys_ioctl fs/ioctl.c:770 [inline]
    [<00000000d0501578>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770
    [<000000007d6d14a5>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294
    [<000000006db25ff1>] entry_SYSCALL_64_after_hwframe+0x44/0xa9