diff options
author | wm4 <nfxjfg@googlemail.com> | 2015-01-08 17:19:17 +0100 |
---|---|---|
committer | Michael Niedermayer <michaelni@gmx.at> | 2015-01-09 17:18:41 +0100 |
commit | 3b4e9dddcff61eaf01a9a5b63c1abcc4102a313a (patch) | |
tree | 9b4eea5a9a08af3464a5dfb551cfc5b473cf2042 /tests/ref/fate/vp9-02-size-08x66 | |
parent | 2ba1af5791fc405ad648851344fe6dd83d1c92c1 (diff) | |
download | ffmpeg-3b4e9dddcff61eaf01a9a5b63c1abcc4102a313a.tar.gz |
avcodec/dvdsubdec: fix accessing dangling pointers
dvdsub_decode() can call append_to_cached_buf() 2 times, the second time
with ctx->buf as argument. If the second append_to_cached_buf() reallocs
ctx->buf, the argument will be a pointer to the previous, freed block.
This can cause invalid reads at least with some fuzzed files - and
possibly with valid files.
Since packets can apparently not be larger than 64K (even if packets are
combined), just use a fixed size buffer. It will be allocated as part of
the DVDSubContext, and although some memory is "wasted", it's relatively
minimal by modern standards and should be acceptable.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 816577716bc6170bccfea3b9e865618b69a4b426)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'tests/ref/fate/vp9-02-size-08x66')
0 files changed, 0 insertions, 0 deletions