diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2020-07-16 11:14:15 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-07-29 20:29:56 -0700 |
| commit | 74bc3c7ad9c8be76c12c463c1f507befa8845981 (patch) | |
| tree | f585b9419e833e681cffe7ac61a0a35e245b5ff3 /fs/xfs/libxfs/xfs_dquot_buf.c | |
| parent | 38a1789b748ef4e5ee79c3ef564294d93ac52a10 (diff) | |
xfs: improve ondisk dquot flags checking
Create an XFS_DQTYPE_ANY mask for ondisk dquots flags, and use that to
ensure that we never accept any garbage flags when we're loading dquots.
While we're at it, restructure the quota type flag checking to use the
proper masking.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_dquot_buf.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_dquot_buf.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/xfs/libxfs/xfs_dquot_buf.c b/fs/xfs/libxfs/xfs_dquot_buf.c index 75c164ed141c..39d64fbc6b87 100644 --- a/fs/xfs/libxfs/xfs_dquot_buf.c +++ b/fs/xfs/libxfs/xfs_dquot_buf.c @@ -39,6 +39,8 @@ xfs_dquot_verify( struct xfs_disk_dquot *ddq, xfs_dqid_t id) /* used only during quotacheck */ { + __u8 ddq_type; + /* * We can encounter an uninitialized dquot buffer for 2 reasons: * 1. If we crash while deleting the quotainode(s), and those blks got @@ -59,9 +61,12 @@ xfs_dquot_verify( if (ddq->d_version != XFS_DQUOT_VERSION) return __this_address; - if (ddq->d_flags != XFS_DQTYPE_USER && - ddq->d_flags != XFS_DQTYPE_PROJ && - ddq->d_flags != XFS_DQTYPE_GROUP) + if (ddq->d_flags & ~XFS_DQTYPE_ANY) + return __this_address; + ddq_type = ddq->d_flags & XFS_DQTYPE_REC_MASK; + if (ddq_type != XFS_DQTYPE_USER && + ddq_type != XFS_DQTYPE_PROJ && + ddq_type != XFS_DQTYPE_GROUP) return __this_address; if (id != -1 && id != be32_to_cpu(ddq->d_id)) |