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63 lines
2.3 KiB
63 lines
2.3 KiB
4 months ago
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From 2ecbd673a0e2191821ce88128587f709936ad765 Mon Sep 17 00:00:00 2001
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From: Jon Maloy <jmaloy@redhat.com>
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Date: Thu, 18 Jul 2024 09:21:27 -0400
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Subject: [PATCH 6/6] hw/virtio/virtio-crypto: Protect from DMA re-entrancy
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bugs
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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RH-MergeRequest: 380: QEMU: virtio: DMA reentrancy issue leads to double free vulnerability
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RH-Jira: RHEL-32276
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RH-Acked-by: Gerd Hoffmann <None>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [6/6] 975ac4640fd8e7cbf3820757787ee7b1270173be (redhat/rhel/src/qemu-kvm/jons-qemu-kvm-2)
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JIRA: https://issues.redhat.com/browse/RHEL-32276
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CVE: CVE-2024-3446
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Upstream: Merged
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commit f4729ec39ad97a42ceaa7b5697f84f440ea6e5dc
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Author: Philippe Mathieu-Daudé <philmd@linaro.org>
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Date: Thu Apr 4 20:56:41 2024 +0200
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hw/virtio/virtio-crypto: Protect from DMA re-entrancy bugs
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Replace qemu_bh_new_guarded() by virtio_bh_new_guarded()
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so the bus and device use the same guard. Otherwise the
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DMA-reentrancy protection can be bypassed.
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Fixes: CVE-2024-3446
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Cc: qemu-stable@nongnu.org
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Suggested-by: Alexander Bulekov <alxndr@bu.edu>
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Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
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Acked-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Message-Id: <20240409105537.18308-5-philmd@linaro.org>
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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---
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hw/virtio/virtio-crypto.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
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index 1be7bb543c..1741d4aba1 100644
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--- a/hw/virtio/virtio-crypto.c
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+++ b/hw/virtio/virtio-crypto.c
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@@ -817,8 +817,8 @@ static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
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vcrypto->vqs[i].dataq =
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virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh);
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vcrypto->vqs[i].dataq_bh =
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- qemu_bh_new_guarded(virtio_crypto_dataq_bh, &vcrypto->vqs[i],
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- &dev->mem_reentrancy_guard);
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+ virtio_bh_new_guarded(dev, virtio_crypto_dataq_bh,
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+ &vcrypto->vqs[i]);
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vcrypto->vqs[i].vcrypto = vcrypto;
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}
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--
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2.39.3
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