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| author | Michael Niedermayer <michaelni@gmx.at> | 2014-06-20 03:15:28 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-06-23 14:18:20 +0200 |
| commit | d6af26c55c1ea30f85a7d9edbc373f53be1743ee (patch) | |
| tree | 6c9f487d60cac01e31704e7f7cdee3c67ce529a9 | |
| parent | b222e0773c78918a59e7748b56eed0bdd8afa043 (diff) | |
| download | ffmpeg-d6af26c55c1ea30f85a7d9edbc373f53be1743ee.tar.gz | |
avutil/lzo: Fix integer overflow
Embargoed-till: 2014-06-27 requested by researcher, but embargo broken by libav today (git and mailing list)
Fixes: LMS-2014-06-16-4
Found-by: "Don A. Bailey" <donb@securitymouse.com>
See: ccda51b14c0fcae2fad73a24872dce75a7964996
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavutil/lzo.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libavutil/lzo.c b/libavutil/lzo.c index 221a66b9ab..82dba94771 100644 --- a/libavutil/lzo.c +++ b/libavutil/lzo.c @@ -65,8 +65,13 @@ static inline int get_len(LZOContext *c, int x, int mask) { int cnt = x & mask; if (!cnt) { - while (!(x = get_byte(c))) + while (!(x = get_byte(c))) { + if (cnt >= INT_MAX - 1000) { + c->error |= AV_LZO_ERROR; + break; + } cnt += 255; + } cnt += mask + x; } return cnt; |