From: WenTao Liang Date: Sun, 28 Jun 2026 07:27:40 +0000 (+0800) Subject: drm/amd/display: set new_stream to NULL after release X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9fa26b9eed6195bf840f39ac183b9a6237548755;p=thirdparty%2Fkernel%2Flinux.git drm/amd/display: set new_stream to NULL after release 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 (cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28) Cc: stable@vger.kernel.org --- 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 6210a1ff7cc2..b1e6d735cf02 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -12101,6 +12101,7 @@ skip_modeset: /* 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