xfree86: Hold input_lock across SPRITE functions in VGA arbiter
Fixes stack overflow crash with VGA arbiter used with multi GPU systems.
Report and fix identified by 'Joe M' on misc@. ok matthieu@
On OpenBSD, we need the console fd to query wsdisplay type,
This was only causing problems with -keepPriv, since the privilege
separation code already calls xf86OpenConsole() earlier.
The function is idempotent, so there's no harm calling it
several times.
ok kettenis@
and NOTE_CHANGE to notify the desktop environment to deal with
the change (e.g. after plugging in an HDMI cable)
with this change there is no need to manually do any randr commands
if your desktop environment supports it (gnome, mate, kde, etc.)
ok matthieu@, kettenis@
v2: Add overflow check and remove unnecessary check (Julien Cristau)
This addresses:
CVE-2017-12184 in XINERAMA
CVE-2017-12185 in MIT-SCREEN-SAVER
CVE-2017-12186 in X-Resource
CVE-2017-12187 in RENDER
stsp@ reported that modesetting(4) has been reported unreliable
on his laptop, while intel(4) works.
XXXX to be removed after 6.2 to figure out and fix the issue.
ok kettenis@, also discussed briefly with deraadt@ during EuroBSDCon.
It is supposed to be slow, and when such instructions are used to copy
data from/to mapped video memory, some hypervisors (e.g. KVM,
Microsoft Hyper-V) can generate SIGILL or SIGBUS exceptions, causing
Xorg to crash.
Bug report to OpenBSD by Max Parmer, fix from FreeBSD (Dimitry Andric)
via kettenis@
ok kettenis@
care of autoconfiguration based on the information returned by the
WSDISPLAYIO_GTYPE ioctl of the console FD. This should fix selection of
wsfb on loongson and sgi when using a non-KMS kernel driver.
ok matthieu@, jsg@
later. This matches what several Linux distros do these days as it tends to
work better than the intel driver in most cases.
There are some performance issues with vncviewer on at least Ivy Bridge and
Haswell. But for now that regression outweighs the benefits.
ok robert@, tedu@, sthen@
Completely broken on VGA cards (libpciaccess doesn't know about
the alpha specific ways of mapping the PCI space),
only XRender is broken on TGA cards.
Broadwell is still a bit weak and the modesetting driver seems to work
better than the intel driver, while still providing 3D acceleration and
video playback support.
ok phessler@, matthieu@, jsg@
One year after Ilja van Sprundel, discovered and reported a large number
of issues in the way the X server code base handles requests from X clients,
they have been fixed.
