From 0cff60c625131c64847debc2b4cee33ba33e8d8f Mon Sep 17 00:00:00 2001 From: Jakob Bornecrantz Date: Tue, 4 Oct 2011 20:13:27 +0200 Subject: [PATCH] vmwgfx: Disallow user space to send present and readback commands Signed-off-by: Jakob Bornecrantz Reviewed-by: Thomas Hellstrom Signed-off-by: Dave Airlie --- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index c98c3475a9f8..dea0474f6f3b 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -197,6 +197,12 @@ static int vmw_cmd_blt_surf_screen_check(struct vmw_private *dev_priv, } *cmd; cmd = container_of(header, struct vmw_sid_cmd, header); + + if (unlikely(!sw_context->kernel)) { + DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id); + return -EPERM; + } + return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.srcImage.sid); } @@ -210,6 +216,12 @@ static int vmw_cmd_present_check(struct vmw_private *dev_priv, } *cmd; cmd = container_of(header, struct vmw_sid_cmd, header); + + if (unlikely(!sw_context->kernel)) { + DRM_ERROR("Kernel only SVGA3d command: %u.\n", cmd->header.id); + return -EPERM; + } + return vmw_cmd_sid_check(dev_priv, sw_context, &cmd->body.sid); } @@ -478,14 +490,12 @@ static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv, void *buf, uint32_t *size) { uint32_t size_remaining = *size; - bool need_kernel = true; uint32_t cmd_id; cmd_id = le32_to_cpu(((uint32_t *)buf)[0]); switch (cmd_id) { case SVGA_CMD_UPDATE: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdUpdate); - need_kernel = false; break; case SVGA_CMD_DEFINE_GMRFB: *size = sizeof(uint32_t) + sizeof(SVGAFifoCmdDefineGMRFB); @@ -507,7 +517,7 @@ static int vmw_cmd_check_not_3d(struct vmw_private *dev_priv, return -EINVAL; } - if (unlikely(need_kernel && !sw_context->kernel)) { + if (unlikely(!sw_context->kernel)) { DRM_ERROR("Kernel only SVGA command: %u.\n", cmd_id); return -EPERM; } -- GitLab