44 lines
1.5 KiB
Diff
44 lines
1.5 KiB
Diff
From cd0ea71bb6a7d1c503bf2f6f1e3c455cf246d9a1 Mon Sep 17 00:00:00 2001
|
|
From: Marvin Liu <yong.liu@intel.com>
|
|
Date: Wed, 8 Apr 2020 17:13:55 +0800
|
|
Subject: vhost: fix translated address not checked
|
|
|
|
Malicious guest can construct desc with invalid address and zero buffer
|
|
length. That will request vhost to check both translated address and
|
|
translated data length. This patch will add missed address check.
|
|
|
|
Fixes: 75ed51697820 ("vhost: add packed ring batch dequeue")
|
|
Fixes: ef861692c398 ("vhost: add packed ring batch enqueue")
|
|
|
|
This issue has been assigned CVE-2020-10725
|
|
|
|
Signed-off-by: Marvin Liu <yong.liu@intel.com>
|
|
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
|
|
---
|
|
lib/librte_vhost/virtio_net.c | 4 ++++
|
|
1 file changed, 4 insertions(+)
|
|
|
|
diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
|
|
index ac2842b..33f1025 100644
|
|
--- a/lib/librte_vhost/virtio_net.c
|
|
+++ b/lib/librte_vhost/virtio_net.c
|
|
@@ -1086,6 +1086,8 @@ virtio_dev_rx_batch_packed(struct virtio_net *dev,
|
|
VHOST_ACCESS_RW);
|
|
|
|
vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
|
|
+ if (unlikely(!desc_addrs[i]))
|
|
+ return -1;
|
|
if (unlikely(lens[i] != descs[avail_idx + i].len))
|
|
return -1;
|
|
}
|
|
@@ -1841,6 +1843,8 @@ vhost_reserve_avail_batch_packed(struct virtio_net *dev,
|
|
}
|
|
|
|
vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
|
|
+ if (unlikely(!desc_addrs[i]))
|
|
+ return -1;
|
|
if (unlikely((lens[i] != descs[avail_idx + i].len)))
|
|
return -1;
|
|
}
|
|
--
|
|
cgit v1.0
|