cdd0352ba0
Xwayland would crash in some circumstances while trying to issue a pointer locking when the cursor is hidden when there is no seat focus window set. The crash signature looks like: #0 zwp_pointer_constraints_v1_lock_pointer () #1 xwl_pointer_warp_emulator_lock () at xwayland-input.c:2584 #2 xwl_seat_maybe_lock_on_hidden_cursor () at xwayland-input.c:2756 #3 xwl_seat_maybe_lock_on_hidden_cursor () at xwayland-input.c:2765 #4 xwl_seat_cursor_visibility_changed () at xwayland-input.c:2768 #5 xwl_set_cursor () at xwayland-cursor.c:245 #6 miPointerUpdateSprite () at mipointer.c:468 #7 miPointerDisplayCursor () at mipointer.c:206 #8 CursorDisplayCursor () at cursor.c:150 #9 AnimCurDisplayCursor () at animcur.c:220 #10 ChangeToCursor () at events.c:936 #11 ActivatePointerGrab () at events.c:1542 #12 GrabDevice () at events.c:5120 #13 ProcGrabPointer () at events.c:4908 #14 Dispatch () at dispatch.c:478 #15 dix_main () at main.c:276 xwl_pointer_warp_emulator_lock() tries to use the surface from the xwl_seat->focus_window leading to a NULL pointer dereference when that value is NULL. Check that xwl_seat->focus_window is not NULL earlier in the stack in xwl_seat_maybe_lock_on_hidden_cursor() and return early if not the case to avoid the crash. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=102474 Signed-off-by: Olivier Fourdan <ofourdan@redhat.com> Acked-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> |
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| manpages.am | ||
| meson.build | ||
| meson_options.txt | ||
| xorg-server.m4 | ||
| xorg-server.pc.in | ||
| xserver.ent.in | ||
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.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
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https://cgit.freedesktop.org/xorg/xserver
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