LU-15021 quota: protect lqe_glbl_data in lqe

[fs/lustre-release.git] / lustre / quota / qmt_lock.c

diff --git a/lustre/quota/qmt_lock.c b/lustre/quota/qmt_lock.c
index 38bde58..49421e3 100644 (file)
--- a/lustre/quota/qmt_lock.c
+++ b/lustre/quota/qmt_lock.c
@@ -520,10 +520,13 @@ int qmt_lvbo_free(struct lu_device *ld, struct ldlm_resource *res)
                struct lquota_entry *lqe = res->lr_lvb_data;
                struct lqe_glbl_data *lgd = lqe->lqe_glbl_data;
 
-               /* release lqe reference */
+               mutex_lock(&lqe->lqe_glbl_data_lock);
                lqe->lqe_glbl_data = NULL;
-               lqe_putref(lqe);
                qmt_free_lqe_gd(lgd);
+               mutex_unlock(&lqe->lqe_glbl_data_lock);
+
+               /* release lqe reference */
+               lqe_putref(lqe);
        } else {
                struct dt_object *obj = res->lr_lvb_data;
                /* release object reference */