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authorWang Shilong <wangsl-fnst@cn.fujitsu.com>2013-04-07 14:50:18 +0400
committerJosef Bacik <jbacik@fusionio.com>2013-05-06 23:54:39 +0400
commitb7fef4f593007d52ba7fe4427e099bd71c63c521 (patch)
tree44a7d1bf7d8bb70cd125e435082c1244466e2e0e /fs/btrfs/qgroup.c
parent58400fce5ac5939aadac8ce682edc192c6172f80 (diff)
downloadlinux-b7fef4f593007d52ba7fe4427e099bd71c63c521.tar.xz
Btrfs: fix missing check before creating a qgroup relation
Step to reproduce: mkfs.btrfs <disk> mount <disk> <mnt> btrfs quota enable <mnt> btrfs qgroup assign 0/1 1/1 <mnt> umount <mnt> btrfs-debug-tree <disk> | grep QGROUP If we want to add a qgroup relation, we should gurantee that 'src' and 'dst' exist, otherwise, such qgroup relation should not be allowed to create. Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com> Reviewed-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/qgroup.c')
-rw-r--r--fs/btrfs/qgroup.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 49c4e6398f18..0932b839550c 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -954,6 +954,8 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, u64 src, u64 dst)
{
struct btrfs_root *quota_root;
+ struct btrfs_qgroup *parent;
+ struct btrfs_qgroup *member;
int ret = 0;
mutex_lock(&fs_info->qgroup_ioctl_lock);
@@ -962,6 +964,12 @@ int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans,
ret = -EINVAL;
goto out;
}
+ member = find_qgroup_rb(fs_info, src);
+ parent = find_qgroup_rb(fs_info, dst);
+ if (!member || !parent) {
+ ret = -EINVAL;
+ goto out;
+ }
ret = add_qgroup_relation_item(trans, quota_root, src, dst);
if (ret)