SUNRPC: NULL utsname dereference on NFS umount during namespace cleanup
Fix an Oopsable condition when nsm_mon_unmon is called as part of the namespace cleanup, which now apparently happens after the utsname has been freed. Link: http://lkml.kernel.org/r/20150125220604.090121ae@neptune.homeReported-by: NBruno Prémont <bonbons@linux-vserver.org> Cc: stable@vger.kernel.org # 3.18 Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
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