[FFmpeg-cvslog] avcodec/ra144: Fix undefined integer overflow in add_wav()
Michael Niedermayer
git at videolan.org
Thu Nov 1 02:55:09 EET 2018
ffmpeg | branch: release/3.3 | Michael Niedermayer <michael at niedermayer.cc> | Sun Aug 26 02:26:24 2018 +0200| [5c91bb1881a88980ad19e40d2fcadbfe0eacef6a] | committer: Michael Niedermayer
avcodec/ra144: Fix undefined integer overflow in add_wav()
Fixes: signed integer overflow: -26884 * 91439 cannot be represented in type 'int'
Fixes: 9687/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RA_144_fuzzer-4995588121690112
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 93a203662f6ff1bb9fd2e966bf7df27e9bdb1916)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5c91bb1881a88980ad19e40d2fcadbfe0eacef6a
---
libavcodec/ra144.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c
index cf8127c236..573703d70b 100644
--- a/libavcodec/ra144.c
+++ b/libavcodec/ra144.c
@@ -1516,7 +1516,7 @@ static void add_wav(int16_t *dest, int n, int skip_first, int *m,
if (v[0]) {
for (i=0; i < BLOCKSIZE; i++)
- dest[i] = (s1[i]*v[0] + s2[i]*v[1] + s3[i]*v[2]) >> 12;
+ dest[i] = ((int)(s1[i]*(unsigned)v[0]) + s2[i]*v[1] + s3[i]*v[2]) >> 12;
} else {
for (i=0; i < BLOCKSIZE; i++)
dest[i] = ( s2[i]*v[1] + s3[i]*v[2]) >> 12;
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