|
 |
0727d3 |
From 10b3a7b56dc9b4c88e503c36c1b13d80bcb7b066 Mon Sep 17 00:00:00 2001
|
|
|
0727d3 |
From: Jason Wang <jasowang@redhat.com>
|
|
|
0727d3 |
Date: Tue, 8 Mar 2022 10:42:51 +0800
|
|
|
0727d3 |
Subject: [PATCH 2/6] virtio-net: fix map leaking on error during receive
|
|
|
0727d3 |
|
|
|
0727d3 |
RH-Author: Jon Maloy <jmaloy@redhat.com>
|
|
|
0727d3 |
RH-MergeRequest: 154: virtio-net: fix map leaking on error during receive
|
|
|
0727d3 |
RH-Commit: [1/1] 7178b0cd5ce7c89fe476f2e199c9212c8b89327a (jmaloy/qemu-kvm)
|
|
|
0727d3 |
RH-Bugzilla: 2063206
|
|
|
0727d3 |
RH-Acked-by: Jason Wang <None>
|
|
|
0727d3 |
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
|
|
|
0727d3 |
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
0727d3 |
|
|
|
0727d3 |
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2063206
|
|
|
0727d3 |
Upstream: Merged
|
|
|
0727d3 |
CVE: CVE-2022-26353
|
|
|
0727d3 |
|
|
|
0727d3 |
commit abe300d9d894f7138e1af7c8e9c88c04bfe98b37
|
|
|
0727d3 |
Author: Jason Wang <jasowang@redhat.com>
|
|
|
0727d3 |
Date: Tue Mar 8 10:42:51 2022 +0800
|
|
|
0727d3 |
|
|
|
0727d3 |
virtio-net: fix map leaking on error during receive
|
|
|
0727d3 |
|
|
|
0727d3 |
Commit bedd7e93d0196 ("virtio-net: fix use after unmap/free for sg")
|
|
|
0727d3 |
tries to fix the use after free of the sg by caching the virtqueue
|
|
|
0727d3 |
elements in an array and unmap them at once after receiving the
|
|
|
0727d3 |
packets, But it forgot to unmap the cached elements on error which
|
|
|
0727d3 |
will lead to leaking of mapping and other unexpected results.
|
|
|
0727d3 |
|
|
|
0727d3 |
Fixing this by detaching the cached elements on error. This addresses
|
|
|
0727d3 |
CVE-2022-26353.
|
|
|
0727d3 |
|
|
|
0727d3 |
Reported-by: Victor Tom <vv474172261@gmail.com>
|
|
|
0727d3 |
Cc: qemu-stable@nongnu.org
|
|
|
0727d3 |
Fixes: CVE-2022-26353
|
|
|
0727d3 |
Fixes: bedd7e93d0196 ("virtio-net: fix use after unmap/free for sg")
|
|
|
0727d3 |
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
|
|
|
0727d3 |
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
|
|
0727d3 |
|
|
|
0727d3 |
(cherry picked from commit abe300d9d894f7138e1af7c8e9c88c04bfe98b37)
|
|
|
0727d3 |
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
|
|
|
0727d3 |
---
|
|
|
0727d3 |
hw/net/virtio-net.c | 1 +
|
|
|
0727d3 |
1 file changed, 1 insertion(+)
|
|
|
0727d3 |
|
|
|
0727d3 |
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
|
|
|
0727d3 |
index f2014d5ea0..e1f4748831 100644
|
|
|
0727d3 |
--- a/hw/net/virtio-net.c
|
|
|
0727d3 |
+++ b/hw/net/virtio-net.c
|
|
|
0727d3 |
@@ -1862,6 +1862,7 @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
|
|
|
0727d3 |
|
|
|
0727d3 |
err:
|
|
|
0727d3 |
for (j = 0; j < i; j++) {
|
|
|
0727d3 |
+ virtqueue_detach_element(q->rx_vq, elems[j], lens[j]);
|
|
|
0727d3 |
g_free(elems[j]);
|
|
|
0727d3 |
}
|
|
|
0727d3 |
|
|
|
0727d3 |
--
|
|
|
0727d3 |
2.27.0
|
|
|
0727d3 |
|