First published: Tue Nov 23 2010(Updated: )
If the frontend pass a bad index of production request, the backend will enter an endless loop and then cause a excessive CPU consumption. This issue has been fixed in upstream by: changeset: 391:77f831cbb91d user: Keir Fraser <keir.fraser> date: Fri Jan 18 16:52:25 2008 +0000 summary: blkback: Request-processing loop is unbounded and hence requires a <a href="http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d">http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d</a> changeset: 392:7070d34f251c user: Keir Fraser <keir.fraser> date: Mon Jan 21 11:43:31 2008 +0000 summary: blkback/blktap: Check for kthread_should_stop() in inner loop, <a href="http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c">http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c</a> Version-Release number of selected component (if applicable): 2.6.18-194.el5xen How reproducible: Steps to Reproduce: 1. build a guest kernel with the patch attached. 2. run domU with the patched kernel Actual results: Dom0 got hung. Expected results: Dom0 shouldn't be impacted by a bad guest.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
Affected Software | Affected Version | How to fix |
---|---|---|
Citrix Xen | <=3.3.2 | |
Citrix Xen | =3.0.2 | |
Citrix Xen | =3.0.3 | |
Citrix Xen | =3.0.4 | |
Citrix Xen | =3.1.3 | |
Citrix Xen | =3.1.4 | |
Citrix Xen | =3.2.0 | |
Citrix Xen | =3.2.1 | |
Citrix Xen | =3.2.2 | |
Citrix Xen | =3.2.3 | |
Citrix Xen | =3.3.0 | |
Citrix Xen | =3.3.1 | |
Linux Linux kernel | =2.6.18 | |
All of | ||
Any of | ||
Citrix Xen | <=3.3.2 | |
Citrix Xen | =3.0.2 | |
Citrix Xen | =3.0.3 | |
Citrix Xen | =3.0.4 | |
Citrix Xen | =3.1.3 | |
Citrix Xen | =3.1.4 | |
Citrix Xen | =3.2.0 | |
Citrix Xen | =3.2.1 | |
Citrix Xen | =3.2.2 | |
Citrix Xen | =3.2.3 | |
Citrix Xen | =3.3.0 | |
Citrix Xen | =3.3.1 | |
Linux Linux kernel | =2.6.18 | |
debian/linux-2.6 |
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