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[Xen-devel] Weird bug: system instability after cat /proc/kcore
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] Weird bug: system instability after cat /proc/kcore |
| From: | "Michael Marineau" <mike@xxxxxxxxxxxx> |
| Date: | Wed, 3 Oct 2007 16:03:15 -0700 |
| Delivery-date: | Wed, 03 Oct 2007 16:04:02 -0700 |
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Ok, the existence of this bug just blew my mind. It appears that after coppying /proc/kcore to disk the system starts to behave strangely. Processes start to sometimes segfault randomly or die with a glibc double free error. The system is perfectly fine prior to catting /proc/kcore. I can reproduce this problem on the 2.6.18 kernel from xen 3.1.0 and 3.1.1-rc2. To trigger it I just have to run 'cat /proc/kcore >coredump' and then start hitting the system with something like a gdb compile. I usually see a segfault or some strange failure before the compile finishes. -- Michael Marineau Oregon State University mike@xxxxxxxxxxxx _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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