Commit f798dbfa authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Greg Kroah-Hartman
Browse files

gfs2: Recursive gfs2_quota_hold in gfs2_iomap_end

commit 7009fa9c upstream.

When starting an iomap write, gfs2_quota_lock_check -> gfs2_quota_lock
-> gfs2_quota_hold is called from gfs2_iomap_begin.  At the end of the
write, before unlocking the quotas, punch_hole -> gfs2_quota_hold can be
called again in gfs2_iomap_end, which is incorrect and leads to a failed
assertion.  Instead, move the call to gfs2_quota_unlock before the call
to punch_hole to fix that.

Fixes: 64bc06bb

 ("gfs2: iomap buffered write support")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Andreas Gruenbacher's avatarAndreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ce2a8c83
......@@ -1230,6 +1230,9 @@ static int gfs2_iomap_end(struct inode *inode, loff_t pos, loff_t length,
gfs2_inplace_release(ip);
if (ip->i_qadata && ip->i_qadata->qa_qd_num)
gfs2_quota_unlock(ip);
if (length != written && (iomap->flags & IOMAP_F_NEW)) {
/* Deallocate blocks that were just allocated. */
loff_t blockmask = i_blocksize(inode) - 1;
......@@ -1242,9 +1245,6 @@ static int gfs2_iomap_end(struct inode *inode, loff_t pos, loff_t length,
}
}
if (ip->i_qadata && ip->i_qadata->qa_qd_num)
gfs2_quota_unlock(ip);
if (unlikely(!written))
goto out_unlock;
......
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