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libssh: avoid plain free() of libssh-memory #6481

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@bagder bagder commented Jan 18, 2021

Since curl's own memory debugging system redefines free() calls to track
and fiddle with memory, it cannot be used on memory allocated by 3rd
party libraries.

Third party libraries SHOULD NOT require free() to release allocated
resources for this reason - and libs can use separate healp allocators
on some systems (like Windows) so free() doesn't necessarily work
anyway.

Filed as an issue with libssh: https://bugs.libssh.org/T268

Since curl's own memory debugging system redefines free() calls to track
and fiddle with memory, it cannot be used on memory allocated by 3rd
party libraries.

Third party libraries SHOULD NOT require free() to release allocated
resources for this reason - and libs can use separate healp allocators
on some systems (like Windows) so free() doesn't necessarily work
anyway.

Filed as an issue with libssh: https://bugs.libssh.org/T268
@bagder bagder added the SCP/SFTP label Jan 18, 2021
@jay
jay approved these changes Jan 18, 2021
@bagder bagder closed this in a3efced Jan 18, 2021
@bagder bagder deleted the bagder/libssh-free branch Jan 18, 2021
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