'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'
in avoid of read out of boundary.
Signed-off-by: Su Yue <suy.fnst@xxxxxxxxxxxxxx>
---
fs/btrfs/tree-log.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 11cf38fb3a49..06c7ceb07282 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2111,6 +2111,7 @@ static int replay_xattr_deletes(struct btrfs_trans_handle *trans,
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 @@ static int replay_xattr_deletes(struct btrfs_trans_handle *trans,
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;
--
2.13.0
--
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