grsecurity forums

Being on holiday I'm upgrading some systems.
Previously I had severe lockups on an athlon mp system: those were completely solved by bumping to more recent grsec versions previously. In the mean time my laptop was perfectly stable. During these upgrades experienced multiple general protection faults under load (compiling packages). Messages printed on screen suggested file operations as an origin of the problem. I had to use magic sysreq keys for reboot. Unfortunately no logging were possible after these general protection faults. Since I don't have a remote console, I took an image. It can be found at: http://atoth.sote.hu/atoth/dscn0917b.jpg.
However there were no instances popped up for the last few days of compiling packages.
Please let me know if I may attach other files.

Regards:
Dw.

Dwokfur wrote:During these upgrades experienced multiple general protection faults under load (compiling packages). Messages printed on screen suggested file operations as an origin of the problem.

if you can reproduce those, can you take screenshots of them too?

I had to use magic sysreq keys for reboot. Unfortunately no logging were possible after these general protection faults. Since I don't have a remote console, I took an image. It can be found at: http://atoth.sote.hu/atoth/dscn0917b.jpg.

this is a kernel NULL deref in the mark_files_ro function, looks like a dentry->inode pointer or similar was invalid but i can't tell what led to it (could be collateral damage from previous oops, it'd be important to catch and report the first one...).