Browse Source

quota: add missing use of dq_data_lock in __dquot_initialize

The bulk of __dquot_initialize runs under the dqptr_sem which
protects the inode->i_dquot pointers. It doesn't protect the
dereferenced contents, though. Those are protected by the
dq_data_lock, which is missing around the dquot_resv_space call.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
master
Jeff Mahoney 9 years ago
committed by Jan Kara
parent
commit
68ac8bfb6a
  1. 5
      fs/quota/dquot.c

5
fs/quota/dquot.c

@ -1439,8 +1439,11 @@ static void __dquot_initialize(struct inode *inode, int type)
* did a write before quota was turned on
*/
rsv = inode_get_rsv_space(inode);
if (unlikely(rsv))
if (unlikely(rsv)) {
spin_lock(&dq_data_lock);
dquot_resv_space(inode->i_dquot[cnt], rsv);
spin_unlock(&dq_data_lock);
}
}
}
out_err:

Loading…
Cancel
Save