Re: [PATCH v2] drm/amd/display: set new_stream to NULL after release

[Greg KH]

On Sun, Jun 28, 2026 at 03:27:40PM +0800, WenTao Liang wrote:
> In dm_update_crtc_state(), the skip_modeset path releases new_stream
> via dc_stream_release() but does not set the pointer to NULL.
> 
> If a later error (e.g., color management failure) triggers the fail
> label, the error path calls dc_stream_release() again on the same
> dangling pointer, causing a double release and potential use-after-free.
> 
> Fix this by setting new_stream to NULL after the initial release.
> 
> Fixes: 9b690ef3c7042 ("drm/amd/display: Avoid full modeset when not required")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: WenTao Liang <vulab@xxxxxxxxxxx>
> ---
> Changes in v2:
> - Correct Fixes hash based on reviewer feedback

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