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avcodec/vaapi_encode: Check hwctx 

Fixes: null pointer dereference
Fixes: 70376/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_VAAPI_fuzzer-4733551250046976

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3cd077e282)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-19 22:29:15 +02:00
parent 11834dcd8b
commit 4e5b5a06d7
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GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 2 deletions
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6
libavcodec/vaapi_encode.c
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@ -2253,12 +2253,14 @@ av_cold int ff_vaapi_encode_close(AVCodecContext *avctx)
av_buffer_pool_uninit(&ctx->output_buffer_pool);
if (ctx->va_context != VA_INVALID_ID) {
vaDestroyContext(ctx->hwctx->display, ctx->va_context);
if (ctx->hwctx)
vaDestroyContext(ctx->hwctx->display, ctx->va_context);
ctx->va_context = VA_INVALID_ID;
}
if (ctx->va_config != VA_INVALID_ID) {
vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
if (ctx->hwctx)
vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
ctx->va_config = VA_INVALID_ID;
}