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Fix memory leak on ZEND_FFI_TYPE_CHAR conversion failure #17243

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The success path frees tmp_str, but the error path does not.

Found with help of a SA I'm developing.

@nielsdos nielsdos changed the base branch from master to PHP-8.3 December 22, 2024 20:35
@nielsdos nielsdos marked this pull request as ready for review December 22, 2024 20:35
@nielsdos nielsdos requested a review from dstogov as a code owner December 22, 2024 20:35
The success path frees tmp_str, but the error path does not.
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Thanks!

Can you share a link to your SA (most probably I won't have time to take a deep look anyway).

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nielsdos commented Dec 23, 2024

Can you share a link to your SA (most probably I won't have time to take a deep look anyway).

This is developed during my day job and it's not public yet. I'll share it once I can make it public.
I am required to disclose when I find something with SA so that's why I wrote it down.

@nielsdos nielsdos closed this in a7f7e16 Dec 23, 2024
charmitro pushed a commit to wasix-org/php that referenced this pull request Mar 13, 2025
The success path frees tmp_str, but the error path does not.

Closes phpGH-17243.
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