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Code Issues Releases Activity

avcodec/interplayvideo: Check side data size before use

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Fixes out of array read

Found-by: Thomas Garnier using libFuzzer
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2016-10-25 03:51:17 +02:00
parent c1173437fc
commit 85d23e5cbc
1 changed files with 5 additions and 2 deletions
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7
libavcodec/interplayvideo.c
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@ -1013,10 +1013,13 @@ static int ipvideo_decode_frame(AVCodecContext *avctx,
return ret; return ret;
if (!s->is_16bpp) { if (!s->is_16bpp) {
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); int size;
if (pal) { const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
if (pal && size == AVPALETTE_SIZE) {
frame->palette_has_changed = 1; frame->palette_has_changed = 1;
memcpy(s->pal, pal, AVPALETTE_SIZE); memcpy(s->pal, pal, AVPALETTE_SIZE);
} else if (pal) {
av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
} }
} }