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| author | Tsutomu Itoh <t-itoh@jp.fujitsu.com> | 2011-03-24 06:33:21 +0000 |
|---|---|---|
| committer | root <Chris Mason chris.mason@oracle.com> | 2011-03-28 05:37:37 -0400 |
| commit | 97d9a8a420444eb5b5c071d4b3b9c4100a7ae015 (patch) | |
| tree | 4ed3e77541ebcc4885c4a10630e2f6bf94d3cef2 /fs/btrfs/extent-tree.c | |
| parent | 7e75bf3ff3a716d7b21d8fb43bf823115801c1e9 (diff) | |
| download | lwn-97d9a8a420444eb5b5c071d4b3b9c4100a7ae015.tar.gz lwn-97d9a8a420444eb5b5c071d4b3b9c4100a7ae015.zip | |
Btrfs: check return value of read_tree_block()
This patch is checking return value of read_tree_block(),
and if it is NULL, error processing.
Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index a6a8159c5d1e..5bc658a9d85c 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6067,6 +6067,8 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans, if (reada && level == 1) reada_walk_down(trans, root, wc, path); next = read_tree_block(root, bytenr, blocksize, generation); + if (!next) + return -EIO; btrfs_tree_lock(next); btrfs_set_lock_blocking(next); } @@ -7937,6 +7939,10 @@ static noinline int relocate_one_extent(struct btrfs_root *extent_root, eb = read_tree_block(found_root, block_start, block_size, 0); + if (!eb) { + ret = -EIO; + goto out; + } btrfs_tree_lock(eb); BUG_ON(level != btrfs_header_level(eb)); |