possible memory leak when calling _jsonb_escape

[anibalportero]

Hi!

We are using your amazing library and found a potential mem leak. I'm not sure the patch we prepared to solve it is good though:

pantacor#2

Seems like _jsonb_escape was using the complete bufsize but buf was passed as buf + b->pos. So could _jsonb_escape be writing beyond the limits of buf?

To give some context, we are allocating an initial buffer that we resize if any of the build functions return JSONB_ERROR_NOMEM.

[lcsmuller]

Good catch - I hope I can try your solution later today and then give you a follow-up on it!

Thanks for letting me know, always a great feeling seeing my stuff used by awesome projects.

[lcsmuller]

@anibalportero Should be fixed now, thank you for bringing this to my attention!