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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-07 20:55:16 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 13:33:44 +0200 |
| commit | b9f2afb86192226bcb23744e56545efe3b13a2db (patch) | |
| tree | 539786cd3bc612e18215ca465aba0554f209ecdb | |
| parent | ddd6e68fff668c993239c3f83faabd3a0d944a63 (diff) | |
| download | ffmpeg-b9f2afb86192226bcb23744e56545efe3b13a2db.tar.gz | |
avcodec/apedec: Fix undefined integer overflow in decode_array_0000()
Fixes: signed integer overflow: -2143289344 - 6246400 cannot be represented in type 'int'
Fixes: 19239/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5173755680915456
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 a3655bb02c21e70573335e9396632f64b2589536)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/apedec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index 95bcc0c413..19678a3ef0 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -610,7 +610,7 @@ static void decode_array_0000(APEContext *ctx, GetBitContext *gb, ksummin = rice->k ? (1 << rice->k + 6) : 0; for (; i < blockstodecode; i++) { out[i] = get_rice_ook(&ctx->gb, rice->k); - rice->ksum += out[i] - out[i - 64]; + rice->ksum += out[i] - (unsigned)out[i - 64]; while (rice->ksum < ksummin) { rice->k--; ksummin = rice->k ? ksummin >> 1 : 0; |