misc/libmasm/module: Fix two use after free in ibmasm_init_one

In the Linux kernel, the following vulnerability has been resolved:

misc/libmasm/module: Fix two use after free in ibmasm_init_one

In ibmasm_init_one, it calls ibmasm_init_remote_input_dev().

Inside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are

allocated by input_allocate_device(), and assigned to

sp->remote.mouse_dev and sp->remote.keybd_dev respectively.

In the err_free_devices error branch of ibmasm_init_one,

mouse_dev and keybd_dev are freed by input_free_device(), and return

error. Then the execution runs into error_send_message error branch

of ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called

to unregister the freed sp->remote.mouse_dev and sp->remote.keybd_dev.

My patch add a "error_init_remote" label to handle the error of

ibmasm_init_remote_input_dev(), to avoid the uaf bugs.