gnome-remote-desktop crashes in grd_session_vnc_take_buffer -> rfbProcessEvents -> rfbMakeRichCursorFromXCursor

[Marco Trevisan (Treviño)]

When connecting via gnome remote desktop in ubuntu hirsute with Wayland:

#0 0x00007f39d7c08497 in rfbMakeRichCursorFromXCursor (rfbScreen=<optimized out>,
    cursor=cursor@entry=0x7f39d7c32020 <myCursor>) at ./libvncserver/cursor.c:497
#1 0x00007f39d7c089b7 in rfbSendCursorShape (cl=cl@entry=0x55e0530c5ae0) at ./libvncserver/cursor.c:54
#2 0x00007f39d7bfa33d in rfbSendFramebufferUpdate (cl=cl@entry=0x55e0530c5ae0, givenUpdateRegion=<optimized out>)
    at ./libvncserver/rfbserver.c:3190
#3 0x00007f39d7bf48a5 in rfbUpdateClient (cl=cl@entry=0x55e0530c5ae0) at ./libvncserver/main.c:1252
#4 0x00007f39d7bf4920 in rfbProcessEvents (screen=<optimized out>, usec=<optimized out>, usec@entry=0)
    at ./libvncserver/main.c:1216
#5 0x000055e052add793 in grd_session_vnc_take_buffer (session_vnc=<optimized out>, data=<optimized out>)
    at ../src/grd-session-vnc.c:169
#6 0x000055e052ae2bde in do_render (loop=<optimized out>, async=<optimized out>, seq=<optimized out>, data=<optimized out>,
    size=<optimized out>, user_data=<optimized out>) at ../src/grd-vnc-pipewire-stream.c:248
#7 0x00007f39d193e806 in ?? () from /usr/lib/x86_64-linux-gnu/spa-0.2/support/libspa-support.so
#8 0x00007f39d193e712 in ?? () from /usr/lib/x86_64-linux-gnu/spa-0.2/support/libspa-support.so
#9 0x00007f39d193f063 in ?? () from /usr/lib/x86_64-linux-gnu/spa-0.2/support/libspa-support.so
#10 0x000055e052ade72a in pipewire_loop_source_dispatch (source=<optimized out>, callback=<optimized out>,
    user_data=<optimized out>) at ../src/grd-vnc-pipewire-stream.c:97
#11 0x00007f39d7f8e6eb in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f39d7f8e998 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f39d7f8ea63 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f39d7e3a46d in g_application_run () from /lib/x86_64-linux-gnu/libgio-2.0.so.0
#15 0x000055e052aca90b in main (argc=<optimized out>, argv=<optimized out>) at ../src/grd-daemon.c:351

This is the same of https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/issues/45 and seems to be fixed by https://github.com/LibVNC/libvncserver/pull/444

[Marco Trevisan (Treviño) (3v1n0)]

Fixed by https://salsa.debian.org/debian-remote-team/libvncserver/-/merge_requests/6/

[Launchpad Janitor (janitor)]

This bug was fixed in the package libvncserver - 0.9.13+dfsg-1ubuntu1

---------------
libvncserver (0.9.13+dfsg-1ubuntu1) hirsute; urgency=medium

  [ Marco Trevisan (Treviño) ]
  * debian/patches: Fix crashes when using desktop sharing with
    gnome-remote-desktop LP: #1915410

 -- Sebastien Bacher <email address hidden> Thu, 11 Feb 2021 17:35:36 +0100