1 files changed, 9 insertions, 2 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ab6b2e5c923e..81ccdbbb43e8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3908,8 +3908,15 @@ static void nfs4_construct_boot_verifier(struct nfs_client *clp,
 {
         __be32 verf[2];
 
-        verf[0] = (__be32)clp->cl_boot_time.tv_sec;
-        verf[1] = (__be32)clp->cl_boot_time.tv_nsec;
+        if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
+                /* An impossible timestamp guarantees this value
+                 * will never match a generated boot time. */
+                verf[0] = 0;
+                verf[1] = (__be32)(NSEC_PER_SEC + 1);
+        } else {
+                verf[0] = (__be32)clp->cl_boot_time.tv_sec;
+                verf[1] = (__be32)clp->cl_boot_time.tv_nsec;
+        }
         memcpy(bootverf->data, verf, sizeof(bootverf->data));
 }