btrfs: Verify dir_item in replay_xattr_deletes
replay_xattr_deletes calls btrfs_search_slot to get buffer and reads
name.
Call verify_dir_item to check name_len in replay_xattr_deletes to avoid
reading out of boundary.
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 11cf38f..06c7ceb 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2111,6 +2111,7 @@
struct btrfs_path *path,
const u64 ino)
{
+ struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_key search_key;
struct btrfs_path *log_path;
int i;
@@ -2152,6 +2153,12 @@
u32 this_len = sizeof(*di) + name_len + data_len;
char *name;
+ ret = verify_dir_item(fs_info, path->nodes[0],
+ path->slots[0], di);
+ if (ret) {
+ ret = -EIO;
+ goto out;
+ }
name = kmalloc(name_len, GFP_NOFS);
if (!name) {
ret = -ENOMEM;