[FFmpeg-cvslog] avcodec/aacdec_template: Fix fixed point scale in decode_cce()
Michael Niedermayer
git at videolan.org
Wed May 17 18:38:37 EEST 2017
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed May 17 15:51:46 2017 +0200| [53a502206a9ea698926694d7252526fe00d1ea44] | committer: Michael Niedermayer
avcodec/aacdec_template: Fix fixed point scale in decode_cce()
Fixes: runtime error: shift exponent 1073741824 is too large for 32-bit type 'int'
Fixes: 1654/clusterfuzz-testcase-minimized-5151903795118080
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=53a502206a9ea698926694d7252526fe00d1ea44
---
libavcodec/aacdec_template.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/libavcodec/aacdec_template.c b/libavcodec/aacdec_template.c
index d034ae4feb..a3780c647e 100644
--- a/libavcodec/aacdec_template.c
+++ b/libavcodec/aacdec_template.c
@@ -2181,7 +2181,11 @@ static int decode_cce(AACContext *ac, GetBitContext *gb, ChannelElement *che)
coup->coupling_point += get_bits1(gb) || (coup->coupling_point >> 1);
sign = get_bits(gb, 1);
- scale = AAC_RENAME(cce_scale)[get_bits(gb, 2)];
+#if USE_FIXED
+ scale = get_bits(gb, 2);
+#else
+ scale = cce_scale[get_bits(gb, 2)];
+#endif
if ((ret = decode_ics(ac, sce, gb, 0, 0)))
return ret;
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