ext4: only look at the bg_flags field if it is valid

[linux-2.6-microblaze.git] / fs / ext4 / super.c

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c61675d..4d34430 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3139,13 +3139,22 @@ static ext4_group_t ext4_has_uninit_itable(struct super_block *sb)
        ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count;
        struct ext4_group_desc *gdp = NULL;
 
+       if (!ext4_has_group_desc_csum(sb))
+               return ngroups;
+
        for (group = 0; group < ngroups; group++) {
                gdp = ext4_get_group_desc(sb, group, NULL);
                if (!gdp)
                        continue;
 
-               if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))
+               if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))
+                       continue;
+               if (group != 0)
                        break;
+               ext4_error(sb, "Inode table for bg 0 marked as "
+                          "needing zeroing");
+               if (sb_rdonly(sb))
+                       return ngroups;
        }
 
        return group;