1 files changed, 12 insertions, 0 deletions

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index b86786202643..aa39e600d159 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -179,6 +179,18 @@ static int ext4_readdir(struct file *filp,
                         continue;
                 }
 
+                /* Check the checksum */
+                if (!buffer_verified(bh) &&
+                    !ext4_dirent_csum_verify(inode,
+                                (struct ext4_dir_entry *)bh->b_data)) {
+                        EXT4_ERROR_FILE(filp, 0, "directory fails checksum "
+                                        "at offset %llu",
+                                        (unsigned long long)filp->f_pos);
+                        filp->f_pos += sb->s_blocksize - offset;
+                        continue;
+                }
+                set_buffer_verified(bh);
+
 revalidate:
                 /* If the dir block has changed since the last call to
                  * readdir(2), then we might be pointing to an invalid