webrtc uses a int32_t like the existing code in ilbcdec Fixes: signed integer overflow: 2080245063 + 257939661 cannot be represented in type 'int' Fixes: 11037/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5682976612941824
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/ilbcdec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/ilbcdec.c b/libavcodec/ilbcdec.c index 8a6dbe0b75..50012c0231 100644 --- a/libavcodec/ilbcdec.c +++ b/libavcodec/ilbcdec.c @@ -1303,7 +1303,8 @@ static int xcorr_coeff(int16_t *target, int16_t *regressor, pos += step; /* Do a +/- to get the next energy */ - energy += step * ((*rp_end * *rp_end - *rp_beg * *rp_beg) >> shifts); + energy += (unsigned)step * ((*rp_end * *rp_end - *rp_beg * *rp_beg) >> shifts); + rp_beg += step; rp_end += step; } -- 2.19.2 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
