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| author | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-05-20 00:31:24 +0200 |
|---|---|---|
| committer | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-05-20 19:07:26 +0200 |
| commit | fa7dec8cb00d2d0dd96ff9863ccda38428610a21 (patch) | |
| tree | b052ef8b2ba59a80e351039a52051b97a524db04 | |
| parent | 37e679881d364b6da817d829d35869d657218ab3 (diff) | |
| download | ffmpeg-fa7dec8cb00d2d0dd96ff9863ccda38428610a21.tar.gz | |
nutdec: stop skipping bytes at EOF
This can unnecessarily waste a lot of time.
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
| -rw-r--r-- | libavformat/nutdec.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c index 6742ee9bdf..8994a91826 100644 --- a/libavformat/nutdec.c +++ b/libavformat/nutdec.c @@ -47,6 +47,8 @@ static int get_str(AVIOContext *bc, char *string, unsigned int maxlen) while (len > maxlen) { avio_r8(bc); len--; + if (bc->eof_reached) + len = maxlen; } if (maxlen) @@ -213,8 +215,11 @@ static int skip_reserved(AVIOContext *bc, int64_t pos) avio_seek(bc, pos, SEEK_CUR); return AVERROR_INVALIDDATA; } else { - while (pos--) + while (pos--) { + if (bc->eof_reached) + return AVERROR_INVALIDDATA; avio_r8(bc); + } return 0; } } @@ -293,8 +298,13 @@ static int decode_main_header(NUTContext *nut) if (tmp_fields > 7) tmp_head_idx = ffio_read_varlen(bc); - while (tmp_fields-- > 8) + while (tmp_fields-- > 8) { + if (bc->eof_reached) { + av_log(s, AV_LOG_ERROR, "reached EOF while decoding main header\n"); + return AVERROR_INVALIDDATA; + } ffio_read_varlen(bc); + } if (count <= 0 || count > 256 - (i <= 'N') - i) { av_log(s, AV_LOG_ERROR, "illegal count %d at %d\n", count, i); @@ -992,8 +1002,13 @@ static int decode_frame_header(NUTContext *nut, int64_t *pts, int *stream_id, *header_idx = ffio_read_varlen(bc); if (flags & FLAG_RESERVED) reserved_count = ffio_read_varlen(bc); - for (i = 0; i < reserved_count; i++) + for (i = 0; i < reserved_count; i++) { + if (bc->eof_reached) { + av_log(s, AV_LOG_ERROR, "reached EOF while decoding frame header\n"); + return AVERROR_INVALIDDATA; + } ffio_read_varlen(bc); + } if (*header_idx >= (unsigned)nut->header_count) { av_log(s, AV_LOG_ERROR, "header_idx invalid\n"); |