Description of problem:
With the split LRU VM, new tmpfs cache pages get inserted into the active list. This can create a false OOM condition under certain specific conditions.
These conditions may be user triggerable and could potentially be a security problem. We are not sure yet whether there is a security problem, but the fix is so laughably simple we'd be crazy not to apply it.
The fix is simply to add new tmpfs cache pages to the inactive list, instead of to the active list.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
Patch(es) available on kernel-2.6.32-31.el6
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.