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commit 1aee9158bc978f91701c5992e395efbc6da2de3c upstream. ... checking that after lock_rename() is too late. Incidentally, NFSv2 had no nfserr_xdev... Fixes: aa387d6ce153 "nfsd: fix EXDEV checking in rename" Cc: stable@vger.kernel.org # v3.9+ Reviewed-by: Jeff Layton <jlayton@kernel.org> Acked-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>