1 files changed, 4 insertions, 2 deletions

diff --git a/mm/shmem.c b/mm/shmem.c
index cc12072f8787..67afba5117f2 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2220,12 +2220,14 @@ static struct dentry *shmem_fh_to_dentry(struct super_block *sb,
 {
         struct inode *inode;
         struct dentry *dentry = NULL;
-        u64 inum = fid->raw[2];
-        inum = (inum << 32) | fid->raw[1];
+        u64 inum;
 
         if (fh_len < 3)
                 return NULL;
 
+        inum = fid->raw[2];
+        inum = (inum << 32) | fid->raw[1];
+
         inode = ilookup5(sb, (unsigned long)(inum + fid->raw[0]),
                         shmem_match, fid->raw);
         if (inode) {