Commit 393551e9 authored Feb 01, 2013 by Eric W. Biederman

gfs2: Remove improper checks in gfs2_set_dqblk.



In set_dqblk it is an error to look at fdq->d_id or fdq->d_flags.
Userspace quota applications do not set these fields when calling
quotactl(Q_XSETQLIM,...), and the kernel does not set those fields
when quota_setquota calls set_dqblk.

gfs2 never looks at fdq->d_id or fdq->d_flags after checking
to see if they match the id and type supplied to set_dqblk.

No other linux filesystem in set_dqblk looks at either fdq->d_id
or fdq->d_flags.

Therefore remove these bogus checks from gfs2 and allow normal
quota setting applications to work.

Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

parent ecb528e3

fs/gfs2/quota.c

+0 −6

Original line number	Diff line number	Diff line
		@@ -1543,13 +1543,9 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
		switch(qid.type) {
		case USRQUOTA:
		type = QUOTA_USER;
		if (fdq->d_flags != FS_USER_QUOTA)
		return -EINVAL;
		break;
		case GRPQUOTA:
		type = QUOTA_GROUP;
		if (fdq->d_flags != FS_GROUP_QUOTA)
		return -EINVAL;
		break;
		default:
		return -EINVAL;
		@@ -1557,8 +1553,6 @@ static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,

		if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
		return -EINVAL;
		if (fdq->d_id != from_kqid(&init_user_ns, qid))
		return -EINVAL;

		error = qd_get(sdp, type, from_kqid(&init_user_ns, qid), &qd);
		if (error)