BUG: memory leak
unreferenced object 0xffff88811ed49620 (size 32):
  comm "syz-executor.0", pid 6881, jiffies 4294946045 (age 13.740s)
  hex dump (first 32 bytes):
    80 1d 8e 04 00 ea ff ff c0 1d 8e 04 00 ea ff ff  ................
    00 1e 8e 04 00 ea ff ff 01 00 00 00 02 00 00 00  ................
  backtrace:
    [<00000000207a85b3>] erase_aeb+0x25/0x110 drivers/mtd/ubi/wl.c:1690
    [<000000002e3d15e0>] ubi_wl_init+0x193/0x5c0 drivers/mtd/ubi/wl.c:1757
    [<000000003e408b2f>] ubi_attach+0x611/0x18ba drivers/mtd/ubi/attach.c:1605
    [<00000000ac301d40>] ubi_attach_mtd_dev+0x584/0xca0 drivers/mtd/ubi/build.c:967
    [<000000006a6e91d4>] ctrl_cdev_ioctl+0x143/0x1b0 drivers/mtd/ubi/cdev.c:1043
    [<000000001d7c3c7d>] vfs_ioctl fs/ioctl.c:47 [inline]
    [<000000001d7c3c7d>] ksys_ioctl+0xa6/0xd0 fs/ioctl.c:763
    [<0000000086662a37>] __do_sys_ioctl fs/ioctl.c:772 [inline]
    [<0000000086662a37>] __se_sys_ioctl fs/ioctl.c:770 [inline]
    [<0000000086662a37>] __x64_sys_ioctl+0x1a/0x20 fs/ioctl.c:770
    [<00000000d15edec0>] do_syscall_64+0x6e/0x220 arch/x86/entry/common.c:294
    [<000000004709dfd4>] entry_SYSCALL_64_after_hwframe+0x44/0xa9