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

["Michael Marineau" <mike@xxxxxxxxxxxx>]

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

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