Module: libav Branch: master Commit: 273e6af47b38391f2bcc157cca0423fe7fcbf55c
Author: Ronald S. Bultje <[email protected]> Committer: Ronald S. Bultje <[email protected]> Date: Fri May 4 16:06:26 2012 -0700 ea: check chunk_size for validity. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: [email protected] --- libavformat/electronicarts.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c index 47ef40f..b215547 100644 --- a/libavformat/electronicarts.c +++ b/libavformat/electronicarts.c @@ -487,12 +487,17 @@ static int ea_read_packet(AVFormatContext *s, while (!packet_read) { chunk_type = avio_rl32(pb); - chunk_size = (ea->big_endian ? avio_rb32(pb) : avio_rl32(pb)) - 8; + chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb); + if (chunk_size <= 8) + return AVERROR_INVALIDDATA; + chunk_size -= 8; switch (chunk_type) { /* audio data */ case ISNh_TAG: /* header chunk also contains data; skip over the header portion*/ + if (chunk_size < 32) + return AVERROR_INVALIDDATA; avio_skip(pb, 32); chunk_size -= 32; case ISNd_TAG: _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
