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authorJosef Bacik <josef@redhat.com>2011-03-16 16:47:17 -0400
committerJosef Bacik <josef@redhat.com>2011-03-17 14:21:41 -0400
commit22a94d44bd6876a90630338229da6c0436d46593 (patch)
tree50e5c7dd52ccf9292240de995e5b42b1619bcd82 /fs/btrfs/tree-log.c
parent41415730a1050499fbd63b3f7dd59b3a4c3bb91a (diff)
downloadop-kernel-dev-22a94d44bd6876a90630338229da6c0436d46593.zip
op-kernel-dev-22a94d44bd6876a90630338229da6c0436d46593.tar.gz
Btrfs: add checks to verify dir items are correct
We need to make sure the dir items we get are valid dir items. So any time we try and read one check it with verify_dir_item, which will do various sanity checks to make sure it looks sane. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/tree-log.c')
-rw-r--r--fs/btrfs/tree-log.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index a4bbb85..429cfcf 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1286,6 +1286,8 @@ static noinline int replay_one_dir_item(struct btrfs_trans_handle *trans,
ptr_end = ptr + item_size;
while (ptr < ptr_end) {
di = (struct btrfs_dir_item *)ptr;
+ if (verify_dir_item(root, eb, di))
+ return -EIO;
name_len = btrfs_dir_name_len(eb, di);
ret = replay_one_name(trans, root, path, eb, di, key);
BUG_ON(ret);
@@ -1412,6 +1414,11 @@ again:
ptr_end = ptr + item_size;
while (ptr < ptr_end) {
di = (struct btrfs_dir_item *)ptr;
+ if (verify_dir_item(root, eb, di)) {
+ ret = -EIO;
+ goto out;
+ }
+
name_len = btrfs_dir_name_len(eb, di);
name = kmalloc(name_len, GFP_NOFS);
if (!name) {
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