ffmpeg | branch: master | Andreas Cadhalpun <andreas.cadhal...@googlemail.com> | Thu Jul 2 23:05:05 2015 +0200| [d0eff8857ceff2601f85037c930cbe61a88b611e] | committer: Andreas Cadhalpun
wavpack: limit extra_bits to 32 and use get_bits_long More than 32 bits can't be stored in an integer and get_bits should not be used with more than 25 bits. Reviewed-by: Paul B Mahol <one...@gmail.com> Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d0eff8857ceff2601f85037c930cbe61a88b611e --- libavcodec/wavpack.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c index d91b66c..554367b 100644 --- a/libavcodec/wavpack.c +++ b/libavcodec/wavpack.c @@ -271,7 +271,7 @@ static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, if (s->got_extra_bits && get_bits_left(&s->gb_extra_bits) >= s->extra_bits) { - S |= get_bits(&s->gb_extra_bits, s->extra_bits); + S |= get_bits_long(&s->gb_extra_bits, s->extra_bits); *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16); } } @@ -835,7 +835,11 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no, continue; } bytestream2_get_buffer(&gb, val, 4); - if (val[0]) { + if (val[0] > 32) { + av_log(avctx, AV_LOG_ERROR, + "Invalid INT32INFO, extra_bits = %d (> 32)\n", val[0]); + continue; + } else if (val[0]) { s->extra_bits = val[0]; } else if (val[1]) { s->shift = val[1]; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
