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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-09 19:59:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-11-16 13:18:23 +0100 |
| commit | 26610256798174b0216ae807d92af3e712b99040 (patch) | |
| tree | 248b4d198b8442f209da8e999860fc532583dbf9 | |
| parent | 14c8795361a8b59c575cdce60961d9086aedd2b4 (diff) | |
| download | ffmpeg-26610256798174b0216ae807d92af3e712b99040.tar.gz | |
avcodec/shorten: Fix integer overflow with offset
Fixes: signed integer overflow: -1625810908 - 582229060 cannot be represented in type 'int'
Fixes: 10977/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5732602018267136
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 2f888771cd1ce8d68d4b18a1009650c1f260aaf2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/shorten.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index fa5ed3b64b..181d89f021 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -382,7 +382,7 @@ static int decode_subframe_lpc(ShortenContext *s, int command, int channel, /* subtract offset from previous samples to use in prediction */ if (command == FN_QLPC && coffset) for (i = -pred_order; i < 0; i++) - s->decoded[channel][i] -= coffset; + s->decoded[channel][i] -= (unsigned)coffset; /* decode residual and do LPC prediction */ init_sum = pred_order ? (command == FN_QLPC ? s->lpcqoffset : 0) : coffset; @@ -397,7 +397,7 @@ static int decode_subframe_lpc(ShortenContext *s, int command, int channel, /* add offset to current samples */ if (command == FN_QLPC && coffset) for (i = 0; i < s->blocksize; i++) - s->decoded[channel][i] += coffset; + s->decoded[channel][i] += (unsigned)coffset; return 0; } |