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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-13 18:56:10 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-07-17 11:46:33 +0200 |
| commit | 6f354ca5fd5e758cdc0151f6e84936c44e0b8e2f (patch) | |
| tree | 9350ab877e261b5eb5949fc8646a3caba4d7ebbc | |
| parent | 6ea8b39c905722201424e12f9c179732fb5dac58 (diff) | |
| download | ffmpeg-6f354ca5fd5e758cdc0151f6e84936c44e0b8e2f.tar.gz | |
avcodec/dvdsub_parser: Allocate input padding
Fixes: out of array read
Fixes: 9350/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DVDSUB_fuzzer-5746777750765568
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 cd86b5cfe278af79d6b147e122d9a72c270a9fde)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/dvdsub_parser.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavcodec/dvdsub_parser.c b/libavcodec/dvdsub_parser.c index 8e1c48bef6..698ccb6987 100644 --- a/libavcodec/dvdsub_parser.c +++ b/libavcodec/dvdsub_parser.c @@ -57,7 +57,11 @@ static int dvdsub_parse(AVCodecParserContext *s, if (pc->packet_len == 0) /* HD-DVD subpicture packet */ pc->packet_len = AV_RB32(buf+2); av_freep(&pc->packet); - pc->packet = av_malloc(pc->packet_len); + if ((unsigned)pc->packet_len > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) { + av_log(avctx, AV_LOG_ERROR, "packet length %d is invalid\n", pc->packet_len); + return buf_size; + } + pc->packet = av_malloc(pc->packet_len + AV_INPUT_BUFFER_PADDING_SIZE); } if (pc->packet) { if (pc->packet_index + buf_size <= pc->packet_len) { |