avcodec/huffyuvdec: Initialize whole output for decode_gray_bitstream()

Fixes: use of uninitialized memory Fixes: 375286238/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-6352546854141952

Michael Niedermayer committed 1 year ago

Commit ef715521 parent aec29331 file · +2 −0Browse files

Unified · Split

@@ -783,6 +783,8 @@ static void decode_gray_bitstream(HYuvDecContext *s, int count) · 782 unmodified lines
783	783	for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
784	784	READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
785	785	}
	786	+ for (; i < count; i++)
	787	+ s->temp[0][2 * i] = s->temp[0][2 * i + 1] = 0;
786	788	} else {
787	789	for (i = 0; i < count; i++) {
788	790	READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);

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