[FFmpeg-devel] [PATCH] avfilter/vf_overlay_cuda: check ctx->hwctx->internal null pointer

[Timo Rothenpieler]

On 09.04.2021 12:34, Steven Liu wrote:
> -    if (ctx->hwctx && ctx->cu_module) {
> +    if (ctx->hwctx && ctx->cu_module && ctx->hwctx->internal) {
>           CUcontext dummy;
>           CudaFunctions *cu = ctx->hwctx->internal->cuda_dl;
>           CHECK_CU(cu->cuCtxPushCurrent(ctx->cu_ctx));
> 

How can this happen at this point?
Did something else prematurely free the hwctx?

This makes me think that the filter is missing a buffer ref somewhere to 
prevent things from getting freed too early.

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