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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2012-05-04 16:06:26 -0700 |
|---|---|---|
| committer | Reinhard Tartler <siretart@tauware.de> | 2012-06-03 19:16:37 +0200 |
| commit | 50336dc4f12d629492b236c84b9ea2adead720db (patch) | |
| tree | aa37f239804b8fd7b74a04f974edf1a2f463175f | |
| parent | 269dbc53599e588efc6027df634a9d5b9476c3fc (diff) | |
| download | ffmpeg-50336dc4f12d629492b236c84b9ea2adead720db.tar.gz | |
ea: check chunk_size for validity.
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit 273e6af47b38391f2bcc157cca0423fe7fcbf55c)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
(cherry picked from commit 6a86b705e1d4b72f0dddfbe23ad3eed9947001d5)
Signed-off-by: Reinhard Tartler <siretart@tauware.de>
| -rw-r--r-- | libavformat/electronicarts.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c index 06689ddfb7..0a6cdd5fd4 100644 --- a/libavformat/electronicarts.c +++ b/libavformat/electronicarts.c @@ -468,12 +468,17 @@ 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: |