undefined behaviour in msgpack::unpacker::next - malloc/delete

[shilkin]

* Description: Ubuntu 14.10
     Release: 14.10
* 0.5.7-3ubuntu1
* I expected that application linked with msgpack3 passed all valgrind memory checks
* undefined behaviour in msgpack::unpacker::next - malloc/delete

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https://github.com/shilkin/msgpack_0.5.7-bug-1469090
Step-by-step instructions to reproduce this bug.

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In 0.5.7 version msgpack::unpacker holds zone in std::aut_ptr.
In msgpack::unpacker::next on line 234 we can see this code:

result->zone().reset( release_zone() );

Look here: https://github.com/msgpack/msgpack-c/blob/cpp-0.5/src/msgpack/unpack.hpp#L234
release_zone() implemented in C-style with malloc(). Line 234 causes an undefined behaviour: malloc/delete.

This bug and many others fixed in 0.5.9.
0.5.9 and 0.5.7 have the same API, so there is no reason to have old version of msgpack in Ubuntu repo.

[Jorge Niedbalski (niedbalski)]

Could you describe the specific steps to reproduce the before mentioned issue?

[shilkin (shilkin)]

Hello! here you are: https://github.com/shilkin/msgpack_0.5.7-bug-1469090
Step-by-step instructions to reproduce this bug.

[shilkin (shilkin)]

Knock-knock! Please, give me any feedback?

[Vitaly Isaev (vitalyisaev2)]

I've faced with the same troubles. Need to update the package.