kNFSd - 1 of 6 - Lock client list while detaching locks

From: Mark Hemment <[email protected]>

The 'client' list should always be protected by the export table lock, but it isn't here!

diff ./fs/nfsd/export.c~current~ ./fs/nfsd/export.c
@@ -903,8 +903,10 @@ exp_nlmdetach(void)
 {
 	struct svc_client	*clp;
 
+	exp_readlock();
 	for (clp = clients; clp; clp = clp->cl_next)
 		nfsd_lockd_unexport(clp);
+	exp_unlock();
 }
 
 /*

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