LU-9278 quota: avoid crash when access failed quota proc file

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

diff --git a/lustre/quota/lproc_quota.c b/lustre/quota/lproc_quota.c
index ecee4a9..4ecbaa7 100644 (file)
--- a/lustre/quota/lproc_quota.c
+++ b/lustre/quota/lproc_quota.c
@@ -308,6 +308,11 @@ static int lprocfs_quota_seq_open(struct inode *inode, struct file *file)
        if (rc)
                goto out_env;
 
+       if (!lqp->lqp_obj) {
+               lqp->lqp_it = NULL;
+               goto out_seq;
+       }
+
        /* initialize iterator */
        iops = &lqp->lqp_obj->do_index_ops->dio_it;
        it = iops->init(&lqp->lqp_env, lqp->lqp_obj, 0);
@@ -322,6 +327,7 @@ static int lprocfs_quota_seq_open(struct inode *inode, struct file *file)
        lqp->lqp_it = it;
        lqp->lqp_cookie = 0;
 
+out_seq:
        seq = file->private_data;
        seq->private = lqp;
        return 0;
@@ -340,9 +346,10 @@ static int lprocfs_quota_seq_release(struct inode *inode, struct file *file)
        const struct dt_it_ops  *iops;
 
        LASSERT(lqp);
-       iops = &lqp->lqp_obj->do_index_ops->dio_it;
-       if (lqp->lqp_it != NULL)
+       if (lqp->lqp_it != NULL) {
+               iops = &lqp->lqp_obj->do_index_ops->dio_it;
                iops->fini(&lqp->lqp_env, lqp->lqp_it);
+       }
        lu_env_fini(&lqp->lqp_env);
        OBD_FREE_PTR(lqp);