10 Commits

Author SHA1 Message Date
Michael Niedermayer
24a0273cb8 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>
(cherry picked from commit d6af26c55c1ea30f85a7d9edbc373f53be1743ee)

Conflicts:

	libavutil/lzo.c
(cherry picked from commit 7b5c706494a775b2b0d0e0a38448610802eef8f4)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-06-23 15:23:08 +02:00
Xi Wang
974c2ad87c lzo: fix overflow checking in copy_backptr()
The check `src > dst' in the form `&c->out[-back] > c->out' invokes
pointer overflow, which is undefined behavior in C.

Remove the check.  Also replace `&c->out[-back] < c->out_start' with
a safe form `c->out - c->out_start < back' to avoid overflow.

CC: libav-stable@libav.org

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit ca6c3f2c53be70aa3c38e8f1292809db89ea1ba6)

Conflicts:

	libavutil/lzo.c
(cherry picked from commit ff712a262d317f5bd6fc9552cd837508e584a565)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-06-23 15:23:06 +02:00
Diego Biurrun
0d08e27015 Add necessary header for LIBAVUTIL_VERSION_MAJOR, fixes the warning:
libavutil/lzo.c:235:5: warning: "LIBAVUTIL_VERSION_MAJOR" is not defined

Originally committed as revision 16962 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-02 23:13:18 +00:00
Reimar Döffinger
a545f067f3 Move doxygen documentation from lzo.c to lzo.h
Originally committed as revision 16949 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-02 20:30:36 +00:00
Reimar Döffinger
0b178e5629 Add av_ prefix to LZO stuff and thus make it officially part of the public API.
Keep lzo1x_decode until the next major version bump for binary compatibility.

Originally committed as revision 16946 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-02 20:16:00 +00:00
Diego Biurrun
bfe3676feb spelling/grammar/consistency review part II
Originally committed as revision 16848 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-28 23:03:17 +00:00
Diego Biurrun
89c9ff504b spelling/grammar/consistency review part I
Originally committed as revision 16840 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-28 00:16:05 +00:00
Peter Ross
6ba10f338a Add av_memcpy_backptr(): deliberately overlapping memcpy variant.
Originally committed as revision 14641 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-06 08:17:03 +00:00
Reimar Döffinger
5e038b4f08 LZO decoder input is const
Originally committed as revision 11797 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-02-01 16:30:51 +00:00
Reimar Döffinger
4302963daa Move lzo decompression to libavutil
Originally committed as revision 7789 to svn://svn.ffmpeg.org/ffmpeg/trunk
2007-01-31 22:58:53 +00:00