diff options
author | David Sterba <dsterba@suse.cz> | 2015-01-02 18:45:16 +0100 |
---|---|---|
committer | David Sterba <dsterba@suse.cz> | 2015-01-14 19:23:46 +0100 |
commit | 381cf6587f8a8a8e981bc0c1aaaa8859b51dc756 (patch) | |
tree | 024b49bf7f036ff79846076c44710337bd0d5ec1 /fs/btrfs | |
parent | eaa27f34e91a14cdceed26ed6c6793ec1d186115 (diff) |
btrfs: fix leak of path in btrfs_find_item
If btrfs_find_item is called with NULL path it allocates one locally but
does not free it. Affected paths are inserting an orphan item for a file
and for a subvol root.
Move the path allocation to the callers.
CC: <stable@vger.kernel.org> # 3.14+
Fixes: 3f870c289900 ("btrfs: expand btrfs_find_item() to include find_orphan_item functionality")
Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/ctree.c | 17 | ||||
-rw-r--r-- | fs/btrfs/disk-io.c | 9 | ||||
-rw-r--r-- | fs/btrfs/tree-log.c | 11 |
3 files changed, 22 insertions, 15 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index 14a72ed14ef7..f54511dd287e 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -2609,32 +2609,23 @@ static int key_search(struct extent_buffer *b, struct btrfs_key *key, return 0; } -int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path, +int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, u64 iobjectid, u64 ioff, u8 key_type, struct btrfs_key *found_key) { int ret; struct btrfs_key key; struct extent_buffer *eb; - struct btrfs_path *path; + + ASSERT(path); key.type = key_type; key.objectid = iobjectid; key.offset = ioff; - if (found_path == NULL) { - path = btrfs_alloc_path(); - if (!path) - return -ENOMEM; - } else - path = found_path; - ret = btrfs_search_slot(NULL, fs_root, &key, path, 0, 0); - if ((ret < 0) || (found_key == NULL)) { - if (path != found_path) - btrfs_free_path(path); + if ((ret < 0) || (found_key == NULL)) return ret; - } eb = path->nodes[0]; if (ret && path->slots[0] >= btrfs_header_nritems(eb)) { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8c63419a7f70..6182e5493d0f 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1630,6 +1630,7 @@ struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, bool check_ref) { struct btrfs_root *root; + struct btrfs_path *path; int ret; if (location->objectid == BTRFS_ROOT_TREE_OBJECTID) @@ -1669,8 +1670,14 @@ again: if (ret) goto fail; - ret = btrfs_find_item(fs_info->tree_root, NULL, BTRFS_ORPHAN_OBJECTID, + path = btrfs_alloc_path(); + if (!path) { + ret = -ENOMEM; + goto fail; + } + ret = btrfs_find_item(fs_info->tree_root, path, BTRFS_ORPHAN_OBJECTID, location->objectid, BTRFS_ORPHAN_ITEM_KEY, NULL); + btrfs_free_path(path); if (ret < 0) goto fail; if (ret == 0) diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 9a02da16f2be..5be45c12dd71 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -1257,10 +1257,19 @@ static int insert_orphan_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 offset) { int ret; - ret = btrfs_find_item(root, NULL, BTRFS_ORPHAN_OBJECTID, + struct btrfs_path *path; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + + ret = btrfs_find_item(root, path, BTRFS_ORPHAN_OBJECTID, offset, BTRFS_ORPHAN_ITEM_KEY, NULL); if (ret > 0) ret = btrfs_insert_orphan_item(trans, root, offset); + + btrfs_free_path(path); + return ret; } |