This is a note to let you know that I've just added the patch titled

drm/amdgpu:fix virtual dce bug

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: drm-amdgpu-fix-virtual-dce-bug.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Fri Mar 16 15:11:08 CET 2018

From: Monk Liu Monk.Liu@amd.com Date: Wed, 15 Nov 2017 17:10:13 +0800 Subject: drm/amdgpu:fix virtual dce bug

From: Monk Liu Monk.Liu@amd.com

[ Upstream commit 129d65c18ecfb249aceb540c31fdaf79bd5a11ff ]

this fix the issue that access memory after freed after driver unloaded.

Signed-off-by: Monk Liu Monk.Liu@amd.com Acked-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c @@ -437,6 +437,8 @@ static int dce_virtual_sw_fini(void *han drm_kms_helper_poll_fini(adev->ddev);

drm_mode_config_cleanup(adev->ddev); + /* clear crtcs pointer to avoid dce irq finish routine access freed data */ + memset(adev->mode_info.crtcs, 0, sizeof(adev->mode_info.crtcs[0]) * AMDGPU_MAX_CRTCS); adev->mode_info.mode_config_initialized = false; return 0; } @@ -723,7 +725,7 @@ static void dce_virtual_set_crtc_vblank_ int crtc, enum amdgpu_interrupt_state state) { - if (crtc >= adev->mode_info.num_crtc) { + if (crtc >= adev->mode_info.num_crtc || !adev->mode_info.crtcs[crtc]) { DRM_DEBUG("invalid crtc %d\n", crtc); return; }

Patches currently in stable-queue which might be from Monk.Liu@amd.com are

queue-4.15/drm-amdgpu-fix-random-missing-of-flr-notify.patch queue-4.15/drm-amdgpu-fix-virtual-dce-bug.patch