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| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-02-01 02:41:17 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-13 13:20:11 -0700 |
| commit | fa3c9782cdbb89ba2139e7c2edc1ae562582a6ba (patch) | |
| tree | 725b1841ce9204fecb6c1489a7ee54db3c0455b8 | |
| parent | 4c324840d6c06406e1f05e12952c050c4e84ce95 (diff) | |
| download | lwn-fa3c9782cdbb89ba2139e7c2edc1ae562582a6ba.tar.gz lwn-fa3c9782cdbb89ba2139e7c2edc1ae562582a6ba.zip | |
Btrfs: Fix oopsen when dropping empty tree.
commit 7a7965f83e89f0be506a96769938a721e4e5ae50 upstream.
When dropping a empty tree, walk_down_tree() skips checking
extent information for the tree root. This will triggers a
BUG_ON in walk_up_proc().
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Acked-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 432a2da4641e..559f72489b3b 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5402,10 +5402,6 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans, int ret; while (level >= 0) { - if (path->slots[level] >= - btrfs_header_nritems(path->nodes[level])) - break; - ret = walk_down_proc(trans, root, path, wc, lookup_info); if (ret > 0) break; @@ -5413,6 +5409,10 @@ static noinline int walk_down_tree(struct btrfs_trans_handle *trans, if (level == 0) break; + if (path->slots[level] >= + btrfs_header_nritems(path->nodes[level])) + break; + ret = do_walk_down(trans, root, path, wc, &lookup_info); if (ret > 0) { path->slots[level]++; |