[FFmpeg-cvslog] avcodec/wmaprodec: Check bits per sample to be within the range not causing integer overflows
Michael Niedermayer
git at videolan.org
Mon Dec 14 17:43:09 CET 2015
ffmpeg | branch: release/2.7 | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 5 13:48:06 2015 +0100| [1601420be4b505d4b9f8f2d92d37e19a44cc42bd] | committer: Michael Niedermayer
avcodec/wmaprodec: Check bits per sample to be within the range not causing integer overflows
Fixes: 549d5aab1480d10f2a775ed90b0342f1/signal_sigabrt_7ffff6ae7cc9_5643_96bbb0cfe3e28be1dadfce1075016345.wma
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 66e05f6ff5e5c105bdd7bf3a49234ddac1b592c5)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=1601420be4b505d4b9f8f2d92d37e19a44cc42bd
---
libavcodec/wmaprodec.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 5b59da5..8653bda 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -300,6 +300,12 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->decode_flags = AV_RL16(edata_ptr+14);
channel_mask = AV_RL32(edata_ptr+2);
s->bits_per_sample = AV_RL16(edata_ptr);
+
+ if (s->bits_per_sample > 32 || s->bits_per_sample < 1) {
+ avpriv_request_sample(avctx, "bits per sample is %d", s->bits_per_sample);
+ return AVERROR_PATCHWELCOME;
+ }
+
/** dump the extradata */
for (i = 0; i < avctx->extradata_size; i++)
ff_dlog(avctx, "[%x] ", avctx->extradata[i]);
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