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avcodec/frame_thread_encoder: Free AVCodecContext structure on error during init 

Fixes: MemLeak
Fixes: 8281
Fixes: PoC_option158.jpg
Fixes: CVE-2020-22037

Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-08-14 09:55:00 +02:00
parent 318e184022
commit 7bba0dd638
2 changed files with 11 additions and 4 deletions
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11
libavcodec/frame_thread_encoder.c
View File

@ -126,7 +126,7 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx)
{
int i=0;
ThreadContext *c;
AVCodecContext *thread_avctx = NULL;
if( !(avctx->thread_type & FF_THREAD_FRAME)
|| !(avctx->codec->capabilities & AV_CODEC_CAP_FRAME_THREADS))
@ -202,16 +202,17 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx)
for(i=0; i<avctx->thread_count ; i++){
int ret;
void *tmpv;
AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
thread_avctx = avcodec_alloc_context3(avctx->codec);
if(!thread_avctx)
goto fail;
tmpv = thread_avctx->priv_data;
*thread_avctx = *avctx;
thread_avctx->priv_data = tmpv;
thread_avctx->internal = NULL;
thread_avctx->hw_frames_ctx = NULL;
ret = av_opt_copy(thread_avctx, avctx);
if (ret < 0)
goto fail;
thread_avctx->priv_data = tmpv;
thread_avctx->internal = NULL;
if (avctx->codec->priv_class) {
int ret = av_opt_copy(thread_avctx->priv_data, avctx->priv_data);
if (ret < 0)
@ -233,6 +234,8 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx)
return 0;
fail:
avcodec_close(thread_avctx);
av_freep(&thread_avctx);
avctx->thread_count = i;
av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
ff_frame_thread_encoder_free(avctx);

4
libavcodec/frame_thread_encoder.h
View File

@ -23,6 +23,10 @@
#include "avcodec.h"
/**
* Initialize frame thread encoder.
* @note hardware encoders are not supported
*/
int ff_frame_thread_encoder_init(AVCodecContext *avctx);
void ff_frame_thread_encoder_free(AVCodecContext *avctx);
int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt,