From df94d42a355715f4a1b9ab695c1d18f9f89c05c4 Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas Date: Fri, 30 Nov 2018 09:56:02 -0500 Subject: [PATCH] drm/amd/display: Fix NULL ptr deref for commit_planes_to_stream [Why] With scaling, underscan and abm changes we can end up calling commit_planes_to_stream in commit_tail. This call uses dm_state->context which can be NULL if the commit was a fast update. [How] Use dc_state instead since that can't be NULL unless the system ran out of memory. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108912 Fixes: e64abff2f133 ("drm/amd/display: Use private obj helpers for dm_atomic_state") Cc: Leo Li Cc: Harry Wentland Signed-off-by: Nicholas Kazlauskas --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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 76b1aebdca0c..8ecd78657d43 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5011,7 +5011,7 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state) status->plane_count, dm_new_crtc_state, to_dm_crtc_state(old_crtc_state), - dm_state->context)) + dc_state)) dm_error("%s: Failed to update stream scaling!\n", __func__); } -- 2.19.2