Patch-mainline: v6.4-rc6
Git-commit: 4d8df0f5f79f747d75a7d356d9b9ea40a4e4c8a9
References: CVE-2024-0340, bsc#1218689
From: Prathu Baronia <prathubaronia2011@gmail.com>
Date: Mon, 22 May 2023 14:20:19 +0530
Subject: [PATCH] vhost: use kzalloc() instead of kmalloc() followed by
memset()
Use kzalloc() to allocate new zeroed out msg node instead of
memsetting a node allocated with kmalloc().
Signed-off-by: Prathu Baronia <prathubaronia2011@gmail.com>
Message-Id: <20230522085019.42914-1-prathubaronia2011@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
drivers/vhost/vhost.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 074273020849..ecb3b397bb38 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2563,12 +2563,11 @@ EXPORT_SYMBOL_GPL(vhost_disable_notify);
/* Create a new message. */
struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type)
{
- struct vhost_msg_node *node = kmalloc(sizeof *node, GFP_KERNEL);
+ /* Make sure all padding within the structure is initialized. */
+ struct vhost_msg_node *node = kzalloc(sizeof(*node), GFP_KERNEL);
if (!node)
return NULL;
- /* Make sure all padding within the structure is initialized. */
- memset(&node->msg, 0, sizeof node->msg);
node->vq = vq;
node->msg.type = type;
return node;
--
2.35.3