5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: WenTao Liang commit 9fa26b9eed6195bf840f39ac183b9a6237548755 upstream. 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: 9b690ef3c704 ("drm/amd/display: Avoid full modeset when not required") Signed-off-by: WenTao Liang Reviewed-by: George Zhang Signed-off-by: Alex Deucher Signed-off-by: Roman Demidov Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 9a6c0b17745e5..4530d22139355 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -10484,6 +10484,7 @@ static int dm_update_crtc_state(struct amdgpu_display_manager *dm, /* Release extra reference */ if (new_stream) dc_stream_release(new_stream); + new_stream = NULL; /* * We want to do dc stream updates that do not require a -- 2.53.0