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-rw-r--r--fs/nfs/super.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 34b1ccf51adf..867f70504531 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2321,6 +2321,12 @@ static int nfs4_validate_text_mount_data(void *options,
nfs4_validate_mount_flags(args);
+ if (args->version != 4) {
+ dfprintk(MOUNT,
+ "NFS4: Illegal mount version\n");
+ return -EINVAL;
+ }
+
if (args->auth_flavor_len > 1) {
dfprintk(MOUNT,
"NFS4: Too many RPC auth flavours specified\n");