1 files changed, 13 insertions, 7 deletions

diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index 649ad7cf2204..d3a587144222 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -38,6 +38,7 @@
 #include <linux/nfs_fs.h>
 #include <linux/export.h>
 #include "nfsfh.h"
+#include "nfsd.h"
 #include "acl.h"
 #include "vfs.h"
 
@@ -916,17 +917,22 @@ nfs4_acl_get_whotype(char *p, u32 len)
         return NFS4_ACL_WHO_NAMED;
 }
 
-int
-nfs4_acl_write_who(int who, char *p)
+__be32 nfs4_acl_write_who(int who, __be32 **p, int *len)
 {
         int i;
+        int bytes;
 
         for (i = 0; i < ARRAY_SIZE(s2t_map); i++) {
-                if (s2t_map[i].type == who) {
-                        memcpy(p, s2t_map[i].string, s2t_map[i].stringlen);
-                        return s2t_map[i].stringlen;
-                }
+                if (s2t_map[i].type != who)
+                        continue;
+                bytes = 4 + (XDR_QUADLEN(s2t_map[i].stringlen) << 2);
+                if (bytes > *len)
+                        return nfserr_resource;
+                *p = xdr_encode_opaque(*p, s2t_map[i].string,
+                                        s2t_map[i].stringlen);
+                *len -= bytes;
+                return 0;
         }
-        BUG();
+        WARN_ON_ONCE(1);
         return -1;
 }