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Trond Myklebust 870bfc6b47 LOCKD: Don't call utsname()->nodename from nlmclnt_setlockargs

commit 9a1b6bf818 upstream.

Firstly, nlmclnt_setlockargs can be called from a reclaimer thread, in
which case we're in entirely the wrong namespace.

Secondly, commit 8aac62706a (move
exit_task_namespaces() outside of exit_notify()) now means that
exit_task_work() is called after exit_task_namespaces(), which
triggers an Oops when we're freeing up the locks.

Fix this by ensuring that we initialise the nlm_host's rpc_client at mount
time, so that the cl_nodename field is initialised to the value of
utsname()->nodename that the net namespace uses. Then replace the
lockd callers of utsname()->nodename.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Toralf Förster <toralf.foerster@gmx.de>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Nix <nix@esperi.org.uk>
Cc: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-08-14 22:59:08 -07:00

clnt4xdr.c

lockd: Remove unnecessary BUG_ON()s in the xdr client code

2012-11-04 14:43:39 -05:00

clntlock.c

LOCKD: Don't call utsname()->nodename from nlmclnt_setlockargs

2013-08-14 22:59:08 -07:00

clntproc.c

LOCKD: Don't call utsname()->nodename from nlmclnt_setlockargs

2013-08-14 22:59:08 -07:00

clntxdr.c

lockd: Remove unnecessary BUG_ON()s in the xdr client code