[FFmpeg-cvslog] libfdk-aacdec: Correct buffer_size parameter

Michael Niedermayer git at videolan.org
Thu Nov 2 01:25:38 EET 2017


ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu May 25 03:21:50 2017 +0200| [f61265571d68c410f5307c240a7f9c95c247fb54] | committer: Martin Storsjö

libfdk-aacdec: Correct buffer_size parameter

The timeDataSize argument to aacDecoder_DecodeFrame() seems undocumented
and until 2016 04 (203e3f28fbebec7011342017fafc2a0bda0ce530) unused.
After that commit libfdk-aacdec interprets it as size in sample units
and memsets that on error.

FFmpeg as well as others (like GStreamer) did interpret it as size in
bytes.

Fixes: 1442/clusterfuzz-testcase-minimized-4540199973421056 (This requires recent libfdk to reproduce)

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f61265571d68c410f5307c240a7f9c95c247fb54
---

 libavcodec/libfdk-aacdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/libfdk-aacdec.c b/libavcodec/libfdk-aacdec.c
index 637d1352a0..aa30f93ef6 100644
--- a/libavcodec/libfdk-aacdec.c
+++ b/libavcodec/libfdk-aacdec.c
@@ -328,7 +328,7 @@ static int fdk_aac_decode_frame(AVCodecContext *avctx, void *data,
         return AVERROR_INVALIDDATA;
     }
 
-    err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) s->decoder_buffer, s->decoder_buffer_size, 0);
+    err = aacDecoder_DecodeFrame(s->handle, (INT_PCM *) s->decoder_buffer, s->decoder_buffer_size / sizeof(INT_PCM), 0);
     if (err == AAC_DEC_NOT_ENOUGH_BITS) {
         ret = avpkt->size - valid;
         goto end;



More information about the ffmpeg-cvslog mailing list