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| author | Su Yue <suy.fnst@cn.fujitsu.com> | 2017-06-06 12:57:03 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-06-21 20:16:04 +0300 |
| commit | 8ee8c2d62d5f9e7d1e592426d3d0b941df29f688 (patch) | |
| tree | 5026f6be37ee695402547dbb5d645b753c09750e /fs/btrfs/tree-log.c | |
| parent | 26a836cec2ea38329ddf3f049c78e9b94e500670 (diff) | |
| download | linux-8ee8c2d62d5f9e7d1e592426d3d0b941df29f688.tar.xz | |
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>
Diffstat (limited to 'fs/btrfs/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 7 |
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; |