RTEMS | cpukit/libblock: Fix resource leak in rtems_fdisk_initialize (!903)

[Kinsey Moore (@opticron)]

Kinsey Moore started a new discussion on cpukit/libblock/src/flashdisk.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/903#note_138824

 >       * One copy buffer of a page size.
 >       */
 >      fd->copy_buffer = malloc (c->block_size);
 > -    if (!fd->copy_buffer)
 > +    if (!fd->copy_buffer) {
 > +      free (fds);

If this fails, it needs to go through the previous file descriptors that were already iterated over and release their memory in copy_buffer as well.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/903#note_138824
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