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pngdec: check version before using png_get_chunk_malloc_max

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png_get_chunk_malloc_max / png_set_chunk_malloc_max were added in 1.4.1.

Bug: webp:505, webp:497
Change-Id: Id4e0643a7734563fec7779f7943ec760da8d276d
(cherry picked from commit 2690782292)
This commit is contained in:
James Zern 2021-02-10 13:36:11 -08:00
parent fedac6cc69
commit 113968ca47
1 changed files with 3 additions and 0 deletions
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3
imageio/pngdec.c
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@ -259,11 +259,14 @@ int ReadPNG(const uint8_t* const data, size_t data_size,
goto End; goto End;
} }
#if LOCAL_PNG_PREREQ(1,5) || \
(LOCAL_PNG_PREREQ(1,4) && PNG_LIBPNG_VER_RELEASE >= 1)
// If it looks like the bitstream is going to need more memory than libpng's // If it looks like the bitstream is going to need more memory than libpng's
// internal limit (default: 8M), try to (reasonably) raise it. // internal limit (default: 8M), try to (reasonably) raise it.
if (data_size > png_get_chunk_malloc_max(png) && data_size < (1u << 24)) { if (data_size > png_get_chunk_malloc_max(png) && data_size < (1u << 24)) {
png_set_chunk_malloc_max(png, data_size); png_set_chunk_malloc_max(png, data_size);
} }
#endif
info = png_create_info_struct(png); info = png_create_info_struct(png);
if (info == NULL) goto Error; if (info == NULL) goto Error;