linux-kernel - [PATCH 5.19 142/365] vdpa_sim: use max_iotlb_entries as a limit in vhost_iotlb

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220823080124.177818092@linuxfoundation.org>
Date:   Tue, 23 Aug 2022 10:00:43 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, gautam.dawar@...inx.com,
        Stefano Garzarella <sgarzare@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Eugenio Pérez <eperezma@...hat.com>
Subject: [PATCH 5.19 142/365] vdpa_sim: use max_iotlb_entries as a limit in vhost_iotlb_init

From: Stefano Garzarella <sgarzare@...hat.com>

commit 67f8f10c0bd78c4a0f0e983e050ab90da015323b upstream.

Commit bda324fd037a ("vdpasim: control virtqueue support") changed
the allocation of iotlbs calling vhost_iotlb_init() for each address
space, instead of vhost_iotlb_alloc().

With this change we forgot to use the limit we had introduced with
the `max_iotlb_entries` module parameter.

Fixes: bda324fd037a ("vdpasim: control virtqueue support")
Cc: gautam.dawar@...inx.com
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
Message-Id: <20220621151208.189959-1-sgarzare@...hat.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Acked-by: Eugenio Pérez <eperezma@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 0f2865899647..3e81532c01cb 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -33,7 +33,7 @@ MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");
 static int max_iotlb_entries = 2048;
 module_param(max_iotlb_entries, int, 0444);
 MODULE_PARM_DESC(max_iotlb_entries,
-		 "Maximum number of iotlb entries. 0 means unlimited. (default: 2048)");
+		 "Maximum number of iotlb entries for each address space. 0 means unlimited. (default: 2048)");
 
 #define VDPASIM_QUEUE_ALIGN PAGE_SIZE
 #define VDPASIM_QUEUE_MAX 256
@@ -291,7 +291,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
 		goto err_iommu;
 
 	for (i = 0; i < vdpasim->dev_attr.nas; i++)
-		vhost_iotlb_init(&vdpasim->iommu[i], 0, 0);
+		vhost_iotlb_init(&vdpasim->iommu[i], max_iotlb_entries, 0);
 
 	vdpasim->buffer = kvmalloc(dev_attr->buffer_size, GFP_KERNEL);
 	if (!vdpasim->buffer)
-- 
2.37.2