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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 00:36:12 +0100 |
| commit | 16793504dfba44e738655807db3274301b9bc690 (patch) | |
| tree | 3e626e19985a8b7e1d4bd44634623ad4e046bb16 /libavcodec/qpeg.c | |
| parent | 7d196f2a5a48faf25fd904b33b1fd239daae9840 (diff) | |
| download | ffmpeg-16793504dfba44e738655807db3274301b9bc690.tar.gz | |
avcodec/qpeg: Check side data size before use
Fixes out of array read
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/qpeg.c')
| -rw-r--r-- | libavcodec/qpeg.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c index 9eaf9b8054..9bfecc3a31 100644 --- a/libavcodec/qpeg.c +++ b/libavcodec/qpeg.c @@ -260,7 +260,8 @@ static int decode_frame(AVCodecContext *avctx, AVFrame * const ref = a->ref; uint8_t* outdata; int delta, ret; - const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); + int pal_size; + const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size); if (avpkt->size < 0x86) { av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); @@ -287,9 +288,11 @@ static int decode_frame(AVCodecContext *avctx, } /* make the palette available on the way out */ - if (pal) { + if (pal && pal_size == AVPALETTE_SIZE) { p->palette_has_changed = 1; memcpy(a->pal, pal, AVPALETTE_SIZE); + } else if (pal) { + av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size); } memcpy(p->data[1], a->pal, AVPALETTE_SIZE); |