NFSv4.2: Clear FATTR4_WORD2_SECURITY_LABEL when done decoding

[ Upstream commit eef7314 ]

We need to clear the FATTR4_WORD2_SECURITY_LABEL bitmap flag
irrespective of whether or not the label is too long.

Fixes: aa9c266 ("NFS: Client implementation of Labeled-NFS")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

fs/nfs/nfs4xdr.c

@@ -4234,6 +4234,7 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 		p = xdr_inline_decode(xdr, len);
 		if (unlikely(!p))
 			return -EIO;
+		bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
 		if (len < NFS4_MAXLABELLEN) {
 			if (label) {
 				if (label->len) {
@@ -4246,7 +4247,6 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 				label->lfs = lfs;
 				status = NFS_ATTR_FATTR_V4_SECURITY_LABEL;
 			}
-			bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
 		} else
 			printk(KERN_WARNING "%s: label too long (%u)!\n",
 					__func__, len);