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authorQinghuang Feng <qhfeng.kernel@gmail.com>2009-01-21 10:49:16 -0500
committerChris Mason <chris.mason@oracle.com>2009-01-21 10:49:16 -0500
commit7e6628544abad773222d8b177f738ac2db1859de (patch)
treeb1bdb87b850ed4639f45b1ca10d739f90e186646 /fs
parent86288a198d8e4e8411ff02f9ab848245e8f11257 (diff)
downloadop-kernel-dev-7e6628544abad773222d8b177f738ac2db1859de.zip
op-kernel-dev-7e6628544abad773222d8b177f738ac2db1859de.tar.gz
Btrfs: open_ctree() error handling can oops on fs_info
a bug in open_ctree: struct btrfs_root *open_ctree(..) { .... if (!extent_root || !tree_root || !fs_info || !chunk_root || !dev_root || !csum_root) { err = -ENOMEM; goto fail; //When code flow goes to "fail", fs_info may be NULL or uninitialized. } .... fail: btrfs_close_devices(fs_info->fs_devices);// ! btrfs_mapping_tree_free(&fs_info->mapping_tree);// ! kfree(extent_root); kfree(tree_root); bdi_destroy(&fs_info->bdi);// ! ... ) Signed-off-by: Qinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/disk-io.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 26a1877..3cf1725 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1823,13 +1823,14 @@ fail_sb_buffer:
fail_iput:
invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
iput(fs_info->btree_inode);
-fail:
+
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
+ bdi_destroy(&fs_info->bdi);
+fail:
kfree(extent_root);
kfree(tree_root);
- bdi_destroy(&fs_info->bdi);
kfree(fs_info);
kfree(chunk_root);
kfree(dev_root);
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