Package: xserver-xorg-video-intel
Version: 2:2.99.917+git20161105-1
Severity: important
Tags: patch upstream
Control: retitle -1 segfaults due to missing NULL check in has_connector_backlight
This looks like [1] was reached with dir being NULL, though since you don't
have debugging symbols (and I don't know/can't seem to work out what address
intel_drv.so was loaded at) I can't know for sure. Having said that, this is
the only place where the result of readdir is not checked for NULL, so I don't
know how else this would happen. This bug was introduced by [2]. Can you please
try the attached patch? Whether or not this is the problem, I'll forward it
upstream.
Regards,
James
[1] https://sources.debian.net/src/xserver-xorg-video-intel/2:2.99.917%2Bgit20161105-1%7Ebpo8%2B1/src/sna/sna_display.c/#L1036
[2] https://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/325570e731b5819e28ce6bae72242914bb2d7f8e
On 5 Dec 2016, at 10:25, Micha vor dem Berge <micha.vordemberge@christmann.info> wrote:
Hi all,
I recently upgraded my xserver-xorg-video-intel package to the newest jessie-backports (version 2:2.99.917+git20161105-1~bpo8+1). After a reboot, X doesn't start anymore. I used this package from backports for several months, so the newest update must have caused the trouble, I think.
After a downgrade to jessie stable (version 2:2.21.15-2+b2) X is starting fine again, but I have no HW acceleration... :(
Please find attached the Xorg.log.
Just for information: I'm using Linux Mint Debian Edition, so my desktop is Cinnamon. And I compiled my own kernel (which was no problem in the past). I also tried some of my older kernels of the 4.8.x kernel series - just to be sure that the problem is not introduced by the newest kernel upgrade.
Best regards,
Micha
PS: Please keep me in the loop when discussing this error as I didn't subscribe to the backports mailing-list. Thanks!
<Xorg.0.log.old>