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avcodec/h264: make the first field of H264Context an AVClass 

Fixes use of freed memory
Fixes: asan_heap-uaf_3660f67_757_cov_1257014655_Hi422FR1_SONY_A.jsv
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f3b5b139ad)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-12-17 01:31:48 +01:00
parent c9b25252cb
commit 4b4d0b0290
1 changed files with 1 additions and 0 deletions
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libavcodec/h264.h
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@ -338,6 +338,7 @@ typedef struct H264Picture {
* H264Context
*/
typedef struct H264Context {
AVClass *av_class;
AVCodecContext *avctx;
MECmpContext mecc;
VideoDSPContext vdsp;