diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2021-02-09 18:32:32 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 10:26:51 +0100 |
| commit | fd3b7e07d3c148a910fddb94e83b6824f6aa8874 (patch) | |
| tree | ff46daabdaa91efc9b45eb47905d04ffa3406a96 | |
| parent | fa0201d3902ec9be524e8bc231cd6f0baef984e7 (diff) | |
gfs2: Recursive gfs2_quota_hold in gfs2_iomap_end
commit 7009fa9cd9a5262944b30eb7efb1f0561d074b68 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: 64bc06bb32ee ("gfs2: iomap buffered write support")
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/gfs2/bmap.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 50fa3e08c02f..aaec3c5b0202 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -1228,6 +1228,9 @@ 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; @@ -1240,9 +1243,6 @@ 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; |