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| author | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-10 12:19:48 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-15 16:00:31 +0100 |
| commit | 8c08247990ca5246bf8f2c48fc2f3fd8a043f326 (patch) | |
| tree | 4e7916a1b160202f13f80964fbacb09db551f87e | |
| parent | 2316c3586591f858ad14f586bb30a54700dd266e (diff) | |
| download | ffmpeg-8c08247990ca5246bf8f2c48fc2f3fd8a043f326.tar.gz | |
avcodec/mss2: Check for repeat overflow
Fixes: mss2_left_shift.wmv
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e273dade78943e22b71d0ddb67cd0d737fc26edf)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mss2.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavcodec/mss2.c b/libavcodec/mss2.c index f57685d7b1..1af2cd00aa 100644 --- a/libavcodec/mss2.c +++ b/libavcodec/mss2.c @@ -210,8 +210,13 @@ static int decode_555(GetByteContext *gB, uint16_t *dst, int stride, last_symbol = b << 8 | bytestream2_get_byte(gB); else if (b > 129) { repeat = 0; - while (b-- > 130) + while (b-- > 130) { + if (repeat >= (INT_MAX >> 8) - 1) { + av_log(NULL, AV_LOG_ERROR, "repeat overflow\n"); + return AVERROR_INVALIDDATA; + } repeat = (repeat << 8) + bytestream2_get_byte(gB) + 1; + } if (last_symbol == -2) { int skip = FFMIN((unsigned)repeat, dst + w - p); repeat -= skip; |