nfsd: fix supported attributes for acl & labels

Oops--in 916d2d844afd I moved some constants into an array for
convenience, but here I'm accidentally writing to that array.

The effect is that if you ever encounter a filesystem lacking support
for ACLs or security labels, then all queries of supported attributes
will report that attribute as unsupported from then on.

Fixes: 916d2d844afd "nfsd: clean up supported attribute handling"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 7ecf16be4a444ec250678e89ad210c7f19cbbc18..8fae53ce21d16c8406ff01425d924eb044edee34 100644 (file)
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -2440,7 +2440,9 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
        p++;                /* to be backfilled later */
 
        if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
-               u32 *supp = nfsd_suppattrs[minorversion];
+               u32 supp[3];
+
+               memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
 
                if (!IS_POSIXACL(dentry->d_inode))
                        supp[0] &= ~FATTR4_WORD0_ACL;