Bug 513324 – sys-kernel/hardened-sources-{3.2.59-r5,3.14.5-r2,3.14.6} with grsec, virtio_net and CONFIG_GRKERNSEC_KSTACKOVERFLOW=y crashes KVM qemu host process

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description nosys 2014-06-15 10:23:31 UTC]

linux-hardened-[3.14.5-r2 | 3.14.6] with grsec, virtio_net and CONFIG_GRKERNSEC_KSTACKOVERFLOW=y as qemu-guest crashes the qemu-host process. As i have no direct access to the host itself, I can not provide further information.

Setting CONFIG_GRKERNSEC_KSTACKOVERFLOW=n fixes this for me for both kernels.

Further references:
https://bugs.archlinux.org/task/40627
http://forums.grsecurity.net/viewtopic.php?t=3977&p=14081



Reproducible: Always

Steps to Reproduce:
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[Comment 1 Agostino Sarubbo 2014-06-19 15:43:42 UTC]

I can reproduce it also with 3.2.59-r5

[Comment 2 Anthony Basile 2014-06-19 17:06:03 UTC]

Yes, this is a known issue.  Let me make sure upstream knows too.

[Comment 3 Anthony Basile 2014-07-01 11:26:29 UTC]

(In reply to Anthony Basile from comment #2)
> Yes, this is a known issue.  Let me make sure upstream knows too.

Can you test the latest hardened sources that are in the tree and see if this is still an issue.

[Comment 4 Anthony Basile 2014-07-19 13:27:38 UTC]

(In reply to Anthony Basile from comment #3)
> (In reply to Anthony Basile from comment #2)
> > Yes, this is a known issue.  Let me make sure upstream knows too.
> 
> Can you test the latest hardened sources that are in the tree and see if
> this is still an issue.

This is fixed.  I just tested it.

[Comment 5 Agostino Sarubbo 2014-07-21 15:32:20 UTC]

(In reply to Anthony Basile from comment #4)
> This is fixed.  I just tested it.

I can confirm. It works for me too.