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-rw-r--r--fs/ext3/super.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index a60cc6ec130..df98a770925 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1565,6 +1565,16 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
goto failed_mount;
}
+ if (le32_to_cpu(es->s_blocks_count) >
+ (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) {
+ printk(KERN_ERR "EXT3-fs: filesystem on %s:"
+ " too large to mount safely\n", sb->s_id);
+ if (sizeof(sector_t) < 8)
+ printk(KERN_WARNING "EXT3-fs: CONFIG_LBD not "
+ "enabled\n");
+ goto failed_mount;
+ }
+
if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
goto cantfind_ext3;
sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) -