[FFmpeg-cvslog] avcodec/apedec: fix integer overflow in 8bit samples

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Dec 23 20:39:14 2021 +0100| [7cee3b37187dbf61dbebff023f07ceedfc0129bb] | committer: Michael Niedermayer

avcodec/apedec: fix integer overflow in 8bit samples

Fixes: signed integer overflow: 2147483542 + 128 cannot be represented in type 'int'
Fixes: 42812/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-6344057861832704

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7cee3b37187dbf61dbebff023f07ceedfc0129bb
---

 libavcodec/apedec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c
index 35a2e617e6..b932263012 100644
--- a/libavcodec/apedec.c
+++ b/libavcodec/apedec.c
@@ -1587,7 +1587,7 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
         for (ch = 0; ch < s->channels; ch++) {
             sample8 = (uint8_t *)frame->data[ch];
             for (i = 0; i < blockstodecode; i++)
-                *sample8++ = (s->decoded[ch][i] + 0x80) & 0xff;
+                *sample8++ = (s->decoded[ch][i] + 0x80U) & 0xff;
         }
         break;
     case 16: