1 files changed, 26 insertions, 2 deletions

diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 03599bfe81cf..4dbb84df1b68 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -129,6 +129,8 @@ nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
         sattr->ia_mode &= S_IALLUGO;
 
         dprintk("NFS call  setattr\n");
+        if (sattr->ia_valid & ATTR_FILE)
+                msg.rpc_cred = nfs_file_cred(sattr->ia_file);
         nfs_fattr_init(fattr);
         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
         if (status == 0)
@@ -598,6 +600,29 @@ nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 }
 
+/* Helper functions for NFS lock bounds checking */
+#define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
+static int nfs_lock_check_bounds(const struct file_lock *fl)
+{
+        __s32 start, end;
+
+        start = (__s32)fl->fl_start;
+        if ((loff_t)start != fl->fl_start)
+                goto out_einval;
+
+        if (fl->fl_end != OFFSET_MAX) {
+                end = (__s32)fl->fl_end;
+                if ((loff_t)end != fl->fl_end)
+                        goto out_einval;
+        } else
+                end = NFS_LOCK32_OFFSET_MAX;
+
+        if (start < 0 || start > end)
+                goto out_einval;
+        return 0;
+out_einval:
+        return -EINVAL;
+}
 
 const struct nfs_rpc_ops nfs_v2_clientops = {
         .version        = 2,                   /* protocol version */
@@ -630,7 +655,6 @@ const struct nfs_rpc_ops nfs_v2_clientops = {
         .write_setup    = nfs_proc_write_setup,
         .write_done     = nfs_write_done,
         .commit_setup   = nfs_proc_commit_setup,
-        .file_open      = nfs_open,
-        .file_release   = nfs_release,
         .lock           = nfs_proc_lock,
+        .lock_check_bounds = nfs_lock_check_bounds,
 };