[libav-commits] rtpdec_jpeg: Disallow using the reserved q values

Martin Storsjö git at libav.org
Wed Sep 12 11:15:58 CEST 2012


Module: libav
Branch: master
Commit: 1743938df10dd888484f964d5af8fd3957d26809

Author:    Martin Storsjö <martin at martin.st>
Committer: Martin Storsjö <martin at martin.st>
Date:      Tue Sep 11 14:41:42 2012 +0300

rtpdec_jpeg: Disallow using the reserved q values

Signed-off-by: Martin Storsjö <martin at martin.st>

---

 libavformat/rtpdec_jpeg.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/libavformat/rtpdec_jpeg.c b/libavformat/rtpdec_jpeg.c
index 3f47e71..3f53887 100644
--- a/libavformat/rtpdec_jpeg.c
+++ b/libavformat/rtpdec_jpeg.c
@@ -304,6 +304,10 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
                 qtable_len =  jpeg->qtables_len[q - 128];
             }
         } else { /* q <= 127 */
+            if (q == 0 || q > 99) {
+                av_log(ctx, AV_LOG_ERROR, "Reserved q value %d\n", q);
+                return AVERROR_INVALIDDATA;
+            }
             create_default_qtables(new_qtables, q);
             qtables    = new_qtables;
             qtable_len = sizeof(new_qtables);



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