[FFmpeg-devel] [PATCH] Fix crash if av_vdpau_bind_context() is not used.

[Carl Eugen Hoyos]

2017-10-09 2:04 GMT+02:00 Ivan Kalvachev <ikalvachev at gmail.com>:
> The public functions av_alloc_vdpaucontext() and
> av_vdpau_alloc_context() are allocating AVVDPAUContext
> structure that is supposed to be placed in avctx->hwaccel_context.
>
> However the rest of libavcodec/vdpau.c uses avctx->hwaccel_context
> as struct VDPAUHWContext, that is bigger and does contain
> AVVDPAUContext as first member.
>
> The usage includes write to the new variables in the bigger stuct,
> without checking for block size.
>
> Fix by always allocating the bigger structure.

Patch applied and backported.

Thank you, Carl Eugen