Commit f1ebea7c authored by Michael Niedermayer's avatar Michael Niedermayer

avcodec/tiff: Do not overrun the array ends in dng_blit()

Fixes: out of array access
Fixes: 23589/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-5110559589793792.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f35caea77f76c62bd0e392e514a84833ab1e0c83)
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent c86a9d5b
...@@ -859,8 +859,11 @@ static void dng_blit(TiffContext *s, uint8_t *dst, int dst_stride, ...@@ -859,8 +859,11 @@ static void dng_blit(TiffContext *s, uint8_t *dst, int dst_stride,
} }
} else { } else {
for (line = 0; line < height; line++) { for (line = 0; line < height; line++) {
uint8_t *dst_u8 = dst;
const uint8_t *src_u8 = src;
for (col = 0; col < width; col++) for (col = 0; col < width; col++)
*dst++ = dng_process_color8(*src++, s->dng_lut, s->black_level, scale_factor); *dst_u8++ = dng_process_color8(*src_u8++, s->dng_lut, s->black_level, scale_factor);
dst += dst_stride; dst += dst_stride;
src += src_stride; src += src_stride;
......
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