[FFmpeg-cvslog] avcodec/cinepak: Check side data size before use
Michael Niedermayer
git at videolan.org
Mon Dec 5 19:46:45 EET 2016
ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Sun Oct 30 13:47:38 2016 +0100| [4f2716da68d97384dcf53835955bc9b59238691b] | committer: Michael Niedermayer
avcodec/cinepak: Check side data size before use
Fixes out of array read
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 121be310607879841d19a34d9f16d4fe9ba7f18c)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4f2716da68d97384dcf53835955bc9b59238691b
---
libavcodec/cinepak.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/libavcodec/cinepak.c b/libavcodec/cinepak.c
index a2190d7..737462b 100644
--- a/libavcodec/cinepak.c
+++ b/libavcodec/cinepak.c
@@ -443,10 +443,13 @@ static int cinepak_decode_frame(AVCodecContext *avctx,
return ret;
if (s->palette_video) {
- const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
- if (pal) {
+ int size;
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
+ 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);
}
}
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