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Merge commit '3e1c9da38b849ce2982b516004370081fdd89ed0' into release/2.4

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* commit '3e1c9da38b849ce2982b516004370081fdd89ed0':
  matroskadec: fix crash when parsing invalid mkv

See: d9fe6b926c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2015-04-19 15:57:05 +02:00
parent 3a5b4afd91 3e1c9da38b
commit 0b71cedfe8
1 changed files with 7 additions and 4 deletions
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11
libavformat/matroskadec.c
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@@ -2013,12 +2013,15 @@ static int matroska_read_header(AVFormatContext *s)
matroska->ctx = s; matroska->ctx = s;
/* First read the EBML header. */ /* First read the EBML header. */
if (ebml_parse(matroska, ebml_syntax, &ebml) || if (ebml_parse(matroska, ebml_syntax, &ebml) || !ebml.doctype) {
ebml.version > EBML_VERSION || 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.max_size > sizeof(uint64_t) ||
ebml.id_length > sizeof(uint32_t) || ebml.id_length > sizeof(uint32_t) ||
ebml.doctype_version > 3 || ebml.doctype_version > 3) {
!ebml.doctype) {
av_log(matroska->ctx, AV_LOG_ERROR, av_log(matroska->ctx, AV_LOG_ERROR,
"EBML header using unsupported features\n" "EBML header using unsupported features\n"
"(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n", "(EBML version %"PRIu64", doctype %s, doc version %"PRIu64")\n",