6c12293f6c
This prevents certain tags with a default value assigned to them (as per the EBML syntax elements) from ever being assigned a NULL value. Other parts of the code rely on these being non-NULL (i.e. they don't check for NULL before e.g. using the string in strcmp() or similar), and thus in effect this prevents crashes when reading of such specific tags fails, either because of low memory or because of targeted file corruption. Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org (cherry picked from commit cd40c31ee9ad2cca6f3635950b002fd46be07e98) Signed-off-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Reinhard Tartler <siretart@tauware.de>
Libav README ------------ 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * See the LICENSE file.