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authorSu Yue <suy.fnst@cn.fujitsu.com>2017-06-06 17:57:03 +0800
committerDavid Sterba <dsterba@suse.com>2017-06-21 19:16:04 +0200
commit8ee8c2d62d5f9e7d1e592426d3d0b941df29f688 (patch)
tree5026f6be37ee695402547dbb5d645b753c09750e
parent26a836cec2ea38329ddf3f049c78e9b94e500670 (diff)
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>
-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 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 @@ process_leaf:
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;