RTEMS | cpukit/libblock: Fix resource leak in rtems_fdisk_initialize (CID 1439298) (!903)

[MITHILESH MATTAPALLI (@mithileshm)]

MITHILESH MATTAPALLI created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/903

Project:Branches: mithileshm/rtems:fix-flashdisk-leak to rtems/rtos/rtems:main
Author:   MITHILESH MATTAPALLI




Coverity Scan reported a resource leak in `rtems_fdisk_initialize`.

The function allocates memory for the `fd` array but iterates the pointer `fd` during initialization. If subsequent allocations (like `copy_buffer` or `blocks`) fail, the function returns without freeing the original allocated memory.

This patch saves the base pointer `fds` at the start and ensures it is freed in all error handling paths.

Closes CID 1439298.

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