1 files changed, 27 insertions, 4 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 55b58112d122..f621b44cb800 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -373,8 +373,7 @@ int cifs_get_inode_info_unix(struct inode **pinode,
 
         /* could have done a find first instead but this returns more info */
         rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data,
-                                  cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
-                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+                                  cifs_sb->local_nls, cifs_remap(cifs_sb));
         cifs_put_tlink(tlink);
 
         if (!rc) {
@@ -402,9 +401,25 @@ int cifs_get_inode_info_unix(struct inode **pinode,
                         rc = -ENOMEM;
         } else {
                 /* we already have inode, update it */
+
+                /* if uniqueid is different, return error */
+                if (unlikely(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM &&
+                    CIFS_I(*pinode)->uniqueid != fattr.cf_uniqueid)) {
+                        rc = -ESTALE;
+                        goto cgiiu_exit;
+                }
+
+                /* if filetype is different, return error */
+                if (unlikely(((*pinode)->i_mode & S_IFMT) !=
+                    (fattr.cf_mode & S_IFMT))) {
+                        rc = -ESTALE;
+                        goto cgiiu_exit;
+                }
+
                 cifs_fattr_to_inode(*pinode, &fattr);
         }
 
+cgiiu_exit:
         return rc;
 }
 
@@ -839,6 +854,15 @@ cifs_get_inode_info(struct inode **inode, const char *full_path,
                 if (!*inode)
                         rc = -ENOMEM;
         } else {
+                /* we already have inode, update it */
+
+                /* if filetype is different, return error */
+                if (unlikely(((*inode)->i_mode & S_IFMT) !=
+                    (fattr.cf_mode & S_IFMT))) {
+                        rc = -ESTALE;
+                        goto cgii_exit;
+                }
+
                 cifs_fattr_to_inode(*inode, &fattr);
         }
 
@@ -2215,8 +2239,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
                 pTcon = tlink_tcon(tlink);
                 rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
                                     cifs_sb->local_nls,
-                                    cifs_sb->mnt_cifs_flags &
-                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+                                    cifs_remap(cifs_sb));
                 cifs_put_tlink(tlink);
         }