[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-bugs] [Bug 215] New: linux VM crash on zero page access
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=215 Summary: linux VM crash on zero page access Product: Xen Version: 2.0 Platform: All OS/Version: Linux Status: NEW Severity: critical Priority: P2 Component: Guest-OS AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx ReportedBy: staf.verhaegen@xxxxxxxxx I'm a developer of AROS (http://www.aros.org). This is an OS modeled after the Amiga OS. One of the features is that our OS can run hosted on a linux host. I'm doing part of the development on a Xen VM provided by #unixshell. This is with there latest kernel '2.6.11.10-xenU #5'. The problem is that running AROS can crash the whole virtual machine even when run as a normal user. The crash happens when buggy software is run on the virtual OS that dereferences a NULL pointer. To have a virtual OS running under linux we use the signals to implement task switching. Amiga OS has also a call to disable the task switching. This call then disables certain signals. I have the feeling that when there is a zero page access in such a 'disable' state the whole linux VM crashes. I don't know how security aware xen development is at the moment but this bug is a local DoS attack. -- Configure bugmail: http://bugzilla.xensource.com/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. _______________________________________________ Xen-bugs mailing list Xen-bugs@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-bugs
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |