[FFmpeg-cvslog] avformat/replaygain: avoid undefined / negative abs

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Fri Oct 28 23:28:59 2022 +0200| [13b184c0668b2a03d045083f8a7d0ce9cd403ab7] | committer: Michael Niedermayer

avformat/replaygain: avoid undefined / negative abs

Fixes: signed integer overflow: -2147483648 * 100000 cannot be represented in type 'int'
Fixes: 52060/clusterfuzz-testcase-minimized-ffmpeg_dem_MP3_fuzzer-5131616708329472

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2532b20b17ec557f1b925bfc41c00e7d4e17356c)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=13b184c0668b2a03d045083f8a7d0ce9cd403ab7
---

 libavformat/replaygain.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/replaygain.c b/libavformat/replaygain.c
index 807f851542..08bc31e641 100644
--- a/libavformat/replaygain.c
+++ b/libavformat/replaygain.c
@@ -61,7 +61,7 @@ static int32_t parse_value(const char *value, int32_t min)
         }
     }
 
-    if (abs(db) > (INT32_MAX - mb) / 100000)
+    if (llabs(db) > (INT32_MAX - mb) / 100000)
         return min;
 
     return db * 100000 + sign * mb;