[FFmpeg-cvslog] avcodec/apedec: Use FFABSU() in do_apply_filter()
Michael Niedermayer
git at videolan.org
Tue Jan 26 20:09:14 EET 2021
ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Jan 21 00:07:46 2021 +0100| [59a6becf8ecb1ea25faaeaaf45f4d28de39606eb] | committer: Michael Niedermayer
avcodec/apedec: Use FFABSU() in do_apply_filter()
Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
Fixes: 29053/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-4814432697974784
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Anton Khirnov <anton at khirnov.net>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=59a6becf8ecb1ea25faaeaaf45f4d28de39606eb
---
libavcodec/apedec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 8fe7b5ee86..388d851d03 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -1333,7 +1333,7 @@ static void do_apply_filter(APEContext *ctx, int version, APEFilter *f,
/* Version 3.98 and later files */
/* Update the adaption coefficients */
- absres = FFABS(res);
+ absres = FFABSU(res);
if (absres)
*f->adaptcoeffs = APESIGN(res) *
(8 << ((absres > f->avg * 3) + (absres > f->avg * 4 / 3)));
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