Commit da2a27ef056a0179cbd80f9146e58b89403d9933
2017-03-18T16:15:14
Honor max_memory_to_use/JPEGMEM/-maxmemory This re-introduces a feature of the obsolete system-specific libjpeg memory managers-- namely the ability to limit the amount of main memory used by the library during decompression or multi-pass compression. This is mainly beneficial for two reasons: - Works around a 2 GB limit in libFuzzer - Allows security-sensitive applications to set a memory limit for the JPEG decoder so as to work around the progressive JPEG exploit (LJT-01-004) described here: http://www.libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf This commit also removes obsolete documentation regarding the MS-DOS memory manager (which itself was removed long ago) and changes the documentation of the -maxmemory switch and JPEGMEM environment variable to reflect the fact that backing stores are never used in libjpeg-turbo. Inspired by: https://github.com/caolanm/libjpeg-turbo/commit/066fee2e7d6834f24838bc1896aa38ca77209e3c Closes #143