[Wayland-bugs] [Bug 106122] Weston segfaults on startup if wl_display_create fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106122

            Bug ID: 106122
           Summary: Weston segfaults on startup if wl_display_create fails
           Product: Wayland
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: weston
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: hobbitalastair at yandex.com

The call to wl_display_create does not check if the returned result is NULL,
which can happen (eg if epoll is not compiled into the kernel). This can cause
a segfault on startup.

See
https://github.com/wayland-project/weston/blob/42c0e14808bfd39e1a2eea34f43f0b5fe20fbb16/compositor/main.c#L1886,
and
https://github.com/wayland-project/wayland/blob/bf7cc6805396af8df3b40e10c63de701346c93dd/src/wayland-server.c#L1017
for an example of where wl_display_create may return NULL.

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