From: Murray McAllister <murray.mcallister@gmail.com> To: unlisted-recipients:; (no To-header on input) Cc: murray.mcallister@gmail.com, VMware Graphics <linux-graphics-maintainer@vmware.com>, Thomas Hellstrom <thellstrom@vmware.com>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define() Date: Sat, 11 May 2019 18:01:37 +1200 [thread overview] Message-ID: <20190511060138.20592-1-murray.mcallister@gmail.com> (raw) If SVGA_3D_CMD_DX_DEFINE_RENDERTARGET_VIEW is called with a surface ID of SVGA3D_INVALID_ID, the srf struct will remain NULL after vmw_cmd_res_check(), leading to a null pointer dereference in vmw_view_add(). Signed-off-by: Murray McAllister <murray.mcallister@gmail.com> --- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index 2ff7ba04d8c8..447afd086206 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -2414,6 +2414,10 @@ static int vmw_cmd_dx_view_define(struct vmw_private *dev_priv, return -EINVAL; cmd = container_of(header, typeof(*cmd), header); + if (unlikely(cmd->sid == SVGA3D_INVALID_ID)) { + DRM_ERROR("Invalid surface id.\n"); + return -EINVAL; + } ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, VMW_RES_DIRTY_NONE, user_surface_converter, &cmd->sid, &srf); -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Murray McAllister <murray.mcallister@gmail.com> Cc: murray.mcallister@gmail.com, VMware Graphics <linux-graphics-maintainer@vmware.com>, Thomas Hellstrom <thellstrom@vmware.com>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define() Date: Sat, 11 May 2019 18:01:37 +1200 [thread overview] Message-ID: <20190511060138.20592-1-murray.mcallister@gmail.com> (raw) If SVGA_3D_CMD_DX_DEFINE_RENDERTARGET_VIEW is called with a surface ID of SVGA3D_INVALID_ID, the srf struct will remain NULL after vmw_cmd_res_check(), leading to a null pointer dereference in vmw_view_add(). Signed-off-by: Murray McAllister <murray.mcallister@gmail.com> --- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c index 2ff7ba04d8c8..447afd086206 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -2414,6 +2414,10 @@ static int vmw_cmd_dx_view_define(struct vmw_private *dev_priv, return -EINVAL; cmd = container_of(header, typeof(*cmd), header); + if (unlikely(cmd->sid == SVGA3D_INVALID_ID)) { + DRM_ERROR("Invalid surface id.\n"); + return -EINVAL; + } ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface, VMW_RES_DIRTY_NONE, user_surface_converter, &cmd->sid, &srf); -- 2.20.1
next reply other threads:[~2019-05-11 6:03 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-05-11 6:01 Murray McAllister [this message] 2019-05-11 6:01 ` [PATCH] drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define() Murray McAllister 2019-05-13 12:53 ` Thomas Hellstrom
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