It appears that on some hardware/diver combo such as nv30/nouveau, using GL_ALPHA as format for 8-bit depth will cause an incomplete attachment error (GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT) when trying to bind the texture.
As a result, the FBO is NULL and glamor segfaults when trying to access the FBO width/height in pixmap_priv_get_scale() in glamor_xv_render(). This happens with glamor-xv which uses 8-bit pixmaps, meaning that on such hardware/driver, trying to play a video using Xv will lead to a crash of the Xserver. This affects Xwayland, Xephyr, modesetting driver with glamor accel. But the use of an FBO is not actually needed for glamox-xv, so by disabling FBO at pixmap creation, we can avoid the issue entirely. Fix suggested by Eric Anholt <e...@anholt.net> Signed-off-by: Olivier Fourdan <ofour...@redhat.com> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=100710 Fixes: https://bugzilla.redhat.com/1412814 --- glamor/glamor_xv.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/glamor/glamor_xv.c b/glamor/glamor_xv.c index 3bcf909..31320d1 100644 --- a/glamor/glamor_xv.c +++ b/glamor/glamor_xv.c @@ -430,11 +430,14 @@ glamor_xv_put_image(glamor_port_private *port_priv, glamor_destroy_pixmap(port_priv->src_pix[i]); port_priv->src_pix[0] = - glamor_create_pixmap(pScreen, width, height, 8, 0); + glamor_create_pixmap(pScreen, width, height, 8, + GLAMOR_CREATE_FBO_NO_FBO); port_priv->src_pix[1] = - glamor_create_pixmap(pScreen, width >> 1, height >> 1, 8, 0); + glamor_create_pixmap(pScreen, width >> 1, height >> 1, 8, + GLAMOR_CREATE_FBO_NO_FBO); port_priv->src_pix[2] = - glamor_create_pixmap(pScreen, width >> 1, height >> 1, 8, 0); + glamor_create_pixmap(pScreen, width >> 1, height >> 1, 8, + GLAMOR_CREATE_FBO_NO_FBO); port_priv->src_pix_w = width; port_priv->src_pix_h = height; -- 2.9.3 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel