Based on 2.6.29-rc7 with Aneesh Kumar's patches:
ext4: Validate extent details only when read from the disk
ext4: Add checks to validate extent entries
Sets need_to_validate=0 inside instead of outside the loop.
Signed-off-by: Thiemo Nagel <thiemo.nagel@xxxxxxxxx>
--- linux-2.6.29-rc7/fs/ext4/extents.c~ 2009-03-12 14:51:21.000000000 +0100
+++ linux-2.6.29-rc7/fs/ext4/extents.c 2009-03-12 16:23:41.000000000 +0100
@@ -607,7 +607,6 @@
ext4_ext_find_extent(struct inode *inode, ext4_lblk_t block,
struct ext4_ext_path *path)
{
- int need_to_validate = 0;
struct ext4_extent_header *eh;
struct buffer_head *bh;
short int depth, i, ppos = 0, alloc = 0;
@@ -629,6 +628,7 @@
i = depth;
/* walk through the tree */
while (i) {
+ int need_to_validate = 0;
ext_debug("depth %d: num %d, max %d\n",
ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));
