989562fdd8
Function `xwl_glamor_gbm_init_main_dev` does not check whether `xwl_screen->default_feedback.main_dev` a.k.a. `main_dev` is a valid pointer. This result in some special situation where main linux-dmabuf device is not accessible, such as KWin nested desktop, raising segment fault. This commit add a null pointer check to prevent crashing. Signed-off-by: Chenx Dust <chenx_dust@outlook.com> Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1683 Fixes:d7f1909e- xwayland/glamor/gbm: make wl_drm optional See-also: https://bugzilla.redhat.com/2284141 Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1565> (cherry picked from commit7605833315)
X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
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