kc3-lang/libjpeg-turbo

2021-08-09T17:25:36

jmemmgr.c: Pass correct size arg to jpeg_free_*() This issue was introduced in 5557fd22173ea9ab4c02c81e1dcec9bd6927814f due to an oversight, so it has existed in libjpeg-turbo since the project's inception. However, the issue is effectively a non-issue. Although #325 proposes allowing programs to override jpeg_get_*() and jpeg_free_*() externally, there is currently no way to override those functions without modifying the libjpeg-turbo source code. libjpeg-turbo only includes the malloc()/free() memory manager from libjpeg, and the implementation of jpeg_free_*() in that memory manager ignores the size argument. libjpeg had several additional memory managers for legacy systems (MS-DOS, System 7, etc.), but those memory managers ignored the size argument to jpeg_free_*() as well. Thus, this issue would have only potentially affected custom memory managers in downstream libjpeg-turbo forks, and since no one has complained until now, apparently those are rare. Fixes #542