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| author | Michael Niedermayer <michael@niedermayer.cc> | 2016-10-30 15:12:12 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-10-31 00:19:02 +0100 |
| commit | a6330119a099840c5279697cf80cb768df97a90a (patch) | |
| tree | 9abdf5ee0a97dcd332f6b4af064590a6a856d42f | |
| parent | 21b68cdbae6576bb58c19dd44c0669293f7d05d1 (diff) | |
| download | ffmpeg-a6330119a099840c5279697cf80cb768df97a90a.tar.gz | |
avcodec/msrle: Check side data size before use
Fixes out of array read
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/msrle.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavcodec/msrle.c b/libavcodec/msrle.c index c2f624283d..adb55b1302 100644 --- a/libavcodec/msrle.c +++ b/libavcodec/msrle.c @@ -99,11 +99,14 @@ static int msrle_decode_frame(AVCodecContext *avctx, return ret; if (avctx->bits_per_coded_sample > 1 && avctx->bits_per_coded_sample <= 8) { - const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); + int size; + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size); - if (pal) { + if (pal && size == AVPALETTE_SIZE) { s->frame->palette_has_changed = 1; memcpy(s->pal, pal, AVPALETTE_SIZE); + } else if (pal) { + av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size); } /* make the palette available */ memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE); |