nfsd-6.19 fixes:

A set of NFSD fixes that arrived just a bit late for the 6.19 merge
 window.
 
 Issues reported with v6.19-rc:
 - Mark variable __maybe_unused to avoid W=1 build break
 
 Issues that need expedient stable backports:
 - NFSv4 file creation neglects setting ACL
 - Clear TIME_DELEG in the suppattr_exclcreat bitmap
 - Clear SECLABEL in the suppattr_exclcreat bitmap
 - Fix memory leak in nfsd_create_serv error paths
 - Bound check rq_pages index in inline path
 - Return 0 on success from svc_rdma_copy_inline_range
 - Use rc_pageoff for memcpy byte offset
 - Avoid NULL deref on zero length gss_token in gss_read_proxy_verf
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Merge tag 'nfsd-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux

Pull nfsd fixes from Chuck Lever:
 "A set of NFSD fixes that arrived just a bit late for the 6.19 merge
  window.

  Regression fixes:
   - Mark variable __maybe_unused to avoid W=1 build break

  Stable fixes:
   - NFSv4 file creation neglects setting ACL
   - Clear TIME_DELEG in the suppattr_exclcreat bitmap
   - Clear SECLABEL in the suppattr_exclcreat bitmap
   - Fix memory leak in nfsd_create_serv error paths
   - Bound check rq_pages index in inline path
   - Return 0 on success from svc_rdma_copy_inline_range
   - Use rc_pageoff for memcpy byte offset
   - Avoid NULL deref on zero length gss_token in gss_read_proxy_verf"

* tag 'nfsd-6.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: NFSv4 file creation neglects setting ACL
  NFSD: Clear TIME_DELEG in the suppattr_exclcreat bitmap
  NFSD: Clear SECLABEL in the suppattr_exclcreat bitmap
  nfsd: fix memory leak in nfsd_create_serv error paths
  nfsd: Mark variable __maybe_unused to avoid W=1 build break
  svcrdma: bound check rq_pages index in inline path
  svcrdma: return 0 on success from svc_rdma_copy_inline_range
  svcrdma: use rc_pageoff for memcpy byte offset
  SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf

fs/nfsd/export.c

@@ -1024,7 +1024,7 @@ exp_rootfh(struct net *net, struct auth_domain *clp, char *name,
 {
 	struct svc_export	*exp;
 	struct path		path;
-	struct inode		*inode;
+	struct inode		*inode __maybe_unused;
 	struct svc_fh		fh;
 	int			err;
 	struct nfsd_net		*nn = net_generic(net, nfsd_net_id);

fs/nfsd/nfs4xdr.c

@@ -3375,6 +3375,11 @@ static __be32 nfsd4_encode_fattr4_suppattr_exclcreat(struct xdr_stream *xdr,
 	u32 supp[3];
 
 	memcpy(supp, nfsd_suppattrs[resp->cstate.minorversion], sizeof(supp));
+	if (!IS_POSIXACL(d_inode(args->dentry)))
+		supp[0] &= ~FATTR4_WORD0_ACL;
+	if (!args->contextsupport)
+		supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
+
 	supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
 	supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
 	supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;

fs/nfsd/nfsd.h

@@ -547,8 +547,14 @@ static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
 	(NFSD_WRITEABLE_ATTRS_WORD1 & \
 	 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
+/*
+ * The FATTR4_WORD2_TIME_DELEG attributes are not to be allowed for
+ * OPEN(create) with EXCLUSIVE4_1. It doesn't make sense to set a
+ * delegated timestamp on a new file.
+ */
 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
-	NFSD_WRITEABLE_ATTRS_WORD2
+	(NFSD_WRITEABLE_ATTRS_WORD2 & \
+	~(FATTR4_WORD2_TIME_DELEG_ACCESS | FATTR4_WORD2_TIME_DELEG_MODIFY))
 
 extern int nfsd4_is_junction(struct dentry *dentry);
 extern int register_cld_notifier(void);

fs/nfsd/nfssvc.c

@@ -615,12 +615,15 @@ int nfsd_create_serv(struct net *net)
 	serv = svc_create_pooled(nfsd_programs, ARRAY_SIZE(nfsd_programs),
 				 &nn->nfsd_svcstats,
 				 nfsd_max_blksize, nfsd);
-	if (serv == NULL)
+	if (serv == NULL) {
+		percpu_ref_exit(&nn->nfsd_net_ref);
 		return -ENOMEM;
+	}
 
 	error = svc_bind(serv, net);
 	if (error < 0) {
 		svc_destroy(&serv);
+		percpu_ref_exit(&nn->nfsd_net_ref);
 		return error;
 	}
 	spin_lock(&nfsd_notifier_lock);

fs/nfsd/vfs.h

@@ -67,7 +67,8 @@ static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs)
 	struct iattr *iap = attrs->na_iattr;
 
 	return (iap->ia_valid || (attrs->na_seclabel &&
-		attrs->na_seclabel->len));
+		attrs->na_seclabel->len) ||
+		attrs->na_pacl || attrs->na_dpacl);
 }
 
 __be32		nfserrno (int errno);

net/sunrpc/auth_gss/svcauth_gss.c

@@ -1083,7 +1083,8 @@ static int gss_read_proxy_verf(struct svc_rqst *rqstp,
 	}
 
 	length = min_t(unsigned int, inlen, (char *)xdr->end - (char *)xdr->p);
-	memcpy(page_address(in_token->pages[0]), xdr->p, length);
+	if (length)
+		memcpy(page_address(in_token->pages[0]), xdr->p, length);
 	inlen -= length;
 
 	to_offs = length;

net/sunrpc/xprtrdma/svc_rdma_rw.c

@@ -841,6 +841,9 @@ static int svc_rdma_copy_inline_range(struct svc_rqst *rqstp,
 	for (page_no = 0; page_no < numpages; page_no++) {
 		unsigned int page_len;
 
+		if (head->rc_curpage >= rqstp->rq_maxpages)
+			return -EINVAL;
+
 		page_len = min_t(unsigned int, remaining,
 				 PAGE_SIZE - head->rc_pageoff);
 
@@ -848,7 +851,7 @@ static int svc_rdma_copy_inline_range(struct svc_rqst *rqstp,
 			head->rc_page_count++;
 
 		dst = page_address(rqstp->rq_pages[head->rc_curpage]);
-		memcpy(dst + head->rc_curpage, src + offset, page_len);
+		memcpy((unsigned char *)dst + head->rc_pageoff, src + offset, page_len);
 
 		head->rc_readbytes += page_len;
 		head->rc_pageoff += page_len;
@@ -860,7 +863,7 @@ static int svc_rdma_copy_inline_range(struct svc_rqst *rqstp,
 		offset += page_len;
 	}
 
-	return -EINVAL;
+	return 0;
 }
 
 /**