Re: [Xen-devel] Weird bug: system instability after cat /proc/kcore

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

So the crashes you have been seeing only occur after accessing /proc/kcore?

 -- Keir

On 4/10/07 00:03, "Michael Marineau" <mike@xxxxxxxxxxxx> wrote:

> 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.



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