9df0eb3b5b
- hw/virtio/virtio-crypto: Protect from DMA re-entrancy bugs(CVE-2024-3446) - hw/char/virtio-serial-bus: Protect from DMA re-entrancy bugs(CVE-2024-3446) - hw/display/virtio-gpu: Protect from DMA re-entrancy bugs(CVE-2024-3446) - hw/virtio: Introduce virtio_bh_new_guarded() helper - hw: replace most qemu_bh_new calls with qemu_bh_new_guarded - checkpatch: add qemu_bh_new/aio_bh_new checks - async: avoid use-after-free on re-entrancy guard - async: Add an optional reentrancy guard to the BH API - util/async: add a human-readable name to BHs for debugging - hw/sd/sdhci: Do not update TRNMOD when Command Inhibit (DAT) is set - Include sysemu/sysemu.h a lot less Signed-off-by: Jiabo Feng <fengjiabo1@huawei.com>
44 lines
1.5 KiB
Diff
44 lines
1.5 KiB
Diff
From c4eb651db9b31a8c56395eb9f812bfc9d567a100 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
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Date: Thu, 4 Apr 2024 20:56:35 +0200
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Subject: [PATCH] hw/char/virtio-serial-bus: Protect from DMA re-entrancy
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bugs(CVE-2024-3446)
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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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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: <20240409105537.18308-4-philmd@linaro.org>
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Signed-off-by: liuxiangdong <liuxiangdong5@huawei.com>
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---
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hw/char/virtio-serial-bus.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
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index a614810985..cb8417ee35 100644
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--- a/hw/char/virtio-serial-bus.c
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+++ b/hw/char/virtio-serial-bus.c
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@@ -940,8 +940,7 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp)
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Error *err = NULL;
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port->vser = bus->vser;
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- port->bh = qemu_bh_new_guarded(flush_queued_data_bh, port,
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- &dev->mem_reentrancy_guard);
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+ port->bh = virtio_bh_new_guarded(dev, flush_queued_data_bh, port);
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assert(vsc->have_data);
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--
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2.27.0
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