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| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-31 10:58:47 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-06-11 21:48:34 +0200 |
| commit | 046f264f6b3b2cf7e5a1769fc92335d8a9316282 (patch) | |
| tree | d057bb90894e20fcdab6ec737d5f11a040c6d9d0 | |
| parent | Btrfs: fix remap_file_pages error (diff) | |
| download | linux-046f264f6b3b2cf7e5a1769fc92335d8a9316282.tar.xz linux-046f264f6b3b2cf7e5a1769fc92335d8a9316282.zip | |
Btrfs: Fix null dereference in relocation.c
Fix a potential null dereference in relocation.c
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Acked-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/relocation.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 05d41e569236..b37d723b9d4a 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -784,16 +784,17 @@ again: struct btrfs_extent_ref_v0 *ref0; ref0 = btrfs_item_ptr(eb, path1->slots[0], struct btrfs_extent_ref_v0); - root = find_tree_root(rc, eb, ref0); - if (!root->ref_cows) - cur->cowonly = 1; if (key.objectid == key.offset) { + root = find_tree_root(rc, eb, ref0); if (root && !should_ignore_root(root)) cur->root = root; else list_add(&cur->list, &useless); break; } + if (is_cowonly_root(btrfs_ref_root_v0(eb, + ref0))) + cur->cowonly = 1; } #else BUG_ON(key.type == BTRFS_EXTENT_REF_V0_KEY); |