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swscale/vscale: Check that 2 tap filters are bilinear before using bilinear code

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Fixes: out of array reads
Fixes: 07e8b9c5d348ccdf7add0f37de20cf6c/asan_heap-oob_27e8df7_6849_e56653f768070ec8cb52f587048444c2.mov

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2016-01-14 21:33:53 +01:00
parent b99f498716
commit eb7802afef
2 changed files with 26 additions and 7 deletions
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libswscale/swscale_internal.h
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@@ -398,6 +398,7 @@ typedef struct SwsContext {
uint8_t *chrMmxextFilterCode; ///< Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
int canMMXEXTBeUsed;
int warned_unuseable_bilinear;
int dstY; ///< Last destination vertical line output from last slice.
int flags; ///< Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...