Bug#949980: libgl1-mesa-dri: SIGSEGV in rockchip_dri.so when running Gnome/GTK

[Simon Heath <icefox@dreamquest.io>]

I have this bug too, same hardware.  A bit of inexpert investigation:

OsLookupColor is defined in xserver/os/oscolor.c:
https://gitlab.freedesktop.org/xorg/xserver/blob/master/os/oscolor.c#L1633

I don't know what version numbers this change involves, but that file
hasn't changed since 2017 and the xserver/include/os.h file that
declares that function hasn't changed since May 2019, so it seems
unlikely to be the direct culprit.  It does basically zero validation of
its inputs though, so even if there's no off-by-one errors in its
slightly-suspicious binary search it's probably getting passed bad
inputs, either a nonsense string or bad output pointers.  Will try
to get a full stack trace and figure out what it's doing and where
it's coming from.

Regards,
Simon