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| author | Thomas Guillem <thomas@gllm.fr> | 2015-04-10 19:04:51 +0200 |
|---|---|---|
| committer | Anton Khirnov <anton@khirnov.net> | 2015-04-18 16:49:25 +0200 |
| commit | b8d7f3186e86234f6255f5e8ee9e98573b4d9a6e (patch) | |
| tree | 2558ab3a4b2ea16023e9c8b7227b8efbf6cc3c5a | |
| parent | 1336bb06c9fbf9a14765e9f78616f2aad4f3a45a (diff) | |
| download | ffmpeg-b8d7f3186e86234f6255f5e8ee9e98573b4d9a6e.tar.gz | |
matroskadec: fix crash when parsing invalid mkv
CC: libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>
| -rw-r--r-- | libavformat/matroskadec.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 7dac7beb99..93cd4bbb1c 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -1827,8 +1827,12 @@ static int matroska_read_header(AVFormatContext *s) matroska->ctx = s; /* First read the EBML header. */ - if (ebml_parse(matroska, ebml_syntax, &ebml) || - ebml.version > EBML_VERSION || + if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) { + av_log(matroska->ctx, AV_LOG_ERROR, "EBML header parsing failed\n"); + ebml_free(ebml_syntax, &ebml); + return AVERROR_INVALIDDATA; + } + if (ebml.version > EBML_VERSION || ebml.max_size > sizeof(uint64_t) || ebml.id_length > sizeof(uint32_t) || ebml.doctype_version > 3) { |