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Message-Id: <1707110377-1483-1-git-send-email-ajay.kaher@broadcom.com>
Date: Mon, 5 Feb 2024 10:49:37 +0530
From: Ajay Kaher <ajay.kaher@...adcom.com>
To: stable@...r.kernel.org,
gregkh@...uxfoundation.org
Cc: mst@...hat.com,
jasowang@...hat.com,
kvm@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
alexey.makhalov@...adcom.com,
vasavi.sirnapalli@...adcom.com,
Prathu Baronia <prathubaronia2011@...il.com>,
Ajay Kaher <ajay.kaher@...adcom.com>
Subject: [PATCH v6.1.y-v4.19.y] vhost: use kzalloc() instead of kmalloc() followed by memset()
From: Prathu Baronia <prathubaronia2011@...il.com>
From: Prathu Baronia <prathubaronia2011@...il.com>
commit 4d8df0f5f79f747d75a7d356d9b9ea40a4e4c8a9 upstream
Use kzalloc() to allocate new zeroed out msg node instead of
memsetting a node allocated with kmalloc().
Signed-off-by: Prathu Baronia <prathubaronia2011@...il.com>
Message-Id: <20230522085019.42914-1-prathubaronia2011@...il.com>
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
[Ajay: This is a security fix as per CVE-2024-0340]
Signed-off-by: Ajay Kaher <ajay.kaher@...adcom.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 07427302084955..ecb3b397bb3888 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;
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