35 lines
1.2 KiB
Diff
35 lines
1.2 KiB
Diff
From 8010a15523e896ca2f2436432602210cab793f87 Mon Sep 17 00:00:00 2001
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From: David Marchand <david.marchand@redhat.com>
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Date: Mon, 25 Jul 2022 22:32:03 +0200
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Subject: [PATCH] vhost: fix virtqueue use after free on NUMA reallocation
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[ upstream commit 0b2a2ca35037d6a5168f0832c11d9858b8ae946a ]
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translate_ring_addresses (via numa_realloc) may change a virtio device and
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virtio queue.
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The virtqueue object must be refreshed before accessing the lock.
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Fixes: 04c27cb673b9 ("vhost: fix unsafe vring addresses modifications")
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Signed-off-by: David Marchand <david.marchand@redhat.com>
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Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
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---
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lib/vhost/vhost_user.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
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index df780fd7d6..2b45e35d4a 100644
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--- a/lib/vhost/vhost_user.c
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+++ b/lib/vhost/vhost_user.c
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@@ -2575,6 +2575,7 @@ vhost_user_iotlb_msg(struct virtio_net **pdev, struct VhostUserMsg *msg,
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if (is_vring_iotlb(dev, vq, imsg)) {
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rte_spinlock_lock(&vq->access_lock);
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*pdev = dev = translate_ring_addresses(dev, i);
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+ vq = dev->virtqueue[i];
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rte_spinlock_unlock(&vq->access_lock);
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}
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}
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--
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2.37.3
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