From 129d65c18ecfb249aceb540c31fdaf79bd5a11ff Mon Sep 17 00:00:00 2001 From: Monk Liu Date: Wed, 15 Nov 2017 17:10:13 +0800 Subject: [PATCH] drm/amdgpu:fix virtual dce bug this fix the issue that access memory after freed after driver unloaded. Signed-off-by: Monk Liu Acked-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/dce_virtual.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/dce_virtual.c b/drivers/gpu/drm/amd/amdgpu/dce_virtual.c index a8829af120c1..39460eb1e71a 100644 --- 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 *handle) 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_interrupt_state(struct amdgpu_device *ad 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; } -- 2.30.2