[FFmpeg-cvslog] avcodec/ac3dec_fixed: Fix several invalid left shifts in scale_coefs()

2020-04-23 Thread Michael Niedermayer 
ffmpeg | branch: release/2.8 | Michael Niedermayer  | 
Sat Feb  1 21:25:33 2020 +0100| [d0d0962a8bee21a0bbac4768cc2b647486e230de] | 
committer: Michael Niedermayer

avcodec/ac3dec_fixed: Fix several invalid left shifts in scale_coefs()

Fixes: left shift of negative value -14336
Fixes: 
20298/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AC3_FIXED_fuzzer-5675484201615360

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 
(cherry picked from commit 8e30502abe62f741cfef1e7b75048ae86a99a50f)
Signed-off-by: Michael Niedermayer 

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d0d0962a8bee21a0bbac4768cc2b647486e230de
---

 libavcodec/ac3dec_fixed.c | 17 +
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/libavcodec/ac3dec_fixed.c b/libavcodec/ac3dec_fixed.c
index 332a0622f5..760b74135a 100644
--- a/libavcodec/ac3dec_fixed.c
+++ b/libavcodec/ac3dec_fixed.c
@@ -107,29 +107,30 @@ static void scale_coefs (
   }
 } else {
   shift = -shift;
+  mul <<= shift;
   for (i=0; ihttps://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog

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[FFmpeg-cvslog] avcodec/ac3dec_fixed: Fix several invalid left shifts in scale_coefs()

2020-04-15 Thread Michael Niedermayer 
ffmpeg | branch: master | Michael Niedermayer  | Sat 
Feb  1 21:25:33 2020 +0100| [8e30502abe62f741cfef1e7b75048ae86a99a50f] | 
committer: Michael Niedermayer

avcodec/ac3dec_fixed: Fix several invalid left shifts in scale_coefs()

Fixes: left shift of negative value -14336
Fixes: 
20298/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AC3_FIXED_fuzzer-5675484201615360

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8e30502abe62f741cfef1e7b75048ae86a99a50f
---

 libavcodec/ac3dec_fixed.c | 17 +
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/libavcodec/ac3dec_fixed.c b/libavcodec/ac3dec_fixed.c
index bd66175d50..1e1edc8964 100644
--- a/libavcodec/ac3dec_fixed.c
+++ b/libavcodec/ac3dec_fixed.c
@@ -107,29 +107,30 @@ static void scale_coefs (
   }
 } else {
   shift = -shift;
+  mul <<= shift;
   for (i=0; ihttps://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog

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ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".