qemu-kvm/kvm-hw-char-virtio-serial-bus-Protect-from-DMA-re-entran.patch
Miroslav Rezanina b647e6427f * Mon Jul 29 2024 Miroslav Rezanina <mrezanin@redhat.com> - 6.2.0-50.el8.1
- kvm-virtio-gpu-free-BHs-by-implementing-unrealize.patch [RHEL-32276]
- kvm-virtio-gpu-reset-gfx-resources-in-main-thread.patch [RHEL-32276]
- kvm-hw-virtio-Introduce-virtio_bh_new_guarded-helper.patch [RHEL-32276]
- kvm-hw-display-virtio-gpu-Protect-from-DMA-re-entrancy-b.patch [RHEL-32276]
- kvm-hw-char-virtio-serial-bus-Protect-from-DMA-re-entran.patch [RHEL-32276]
- kvm-hw-virtio-virtio-crypto-Protect-from-DMA-re-entrancy.patch [RHEL-32276]
- Resolves: RHEL-32276
  (CVE-2024-3446 virt:rhel/qemu-kvm: QEMU: virtio: DMA reentrancy issue leads to double free vulnerability [rhel-8])
2024-07-29 02:34:57 -04:00

62 lines
2.1 KiB
Diff

From f4623ea611a74c684b0097b98a803cbe7ffb0825 Mon Sep 17 00:00:00 2001
From: Jon Maloy <jmaloy@redhat.com>
Date: Thu, 18 Jul 2024 09:26:55 -0400
Subject: [PATCH 5/6] hw/char/virtio-serial-bus: Protect from DMA re-entrancy
bugs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Jon Maloy <jmaloy@redhat.com>
RH-MergeRequest: 380: QEMU: virtio: DMA reentrancy issue leads to double free vulnerability
RH-Jira: RHEL-32276
RH-Acked-by: Gerd Hoffmann <None>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [5/6] fc8a445ebf6e763cd1482cd1f7ee23e5b5bbb388 (redhat/rhel/src/qemu-kvm/jons-qemu-kvm-2)
JIRA: https://issues.redhat.com/browse/RHEL-32276
CVE: CVE-2024-3446
Upstream: Merged
commit b4295bff25f7b50de1d9cc94a9c6effd40056bca
Author: Philippe Mathieu-Daudé <philmd@linaro.org>
Date: Thu Apr 4 20:56:35 2024 +0200
hw/char/virtio-serial-bus: Protect from DMA re-entrancy bugs
Replace qemu_bh_new_guarded() by virtio_bh_new_guarded()
so the bus and device use the same guard. Otherwise the
DMA-reentrancy protection can be bypassed.
Fixes: CVE-2024-3446
Cc: qemu-stable@nongnu.org
Suggested-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20240409105537.18308-4-philmd@linaro.org>
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
---
hw/char/virtio-serial-bus.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index f18124b155..791b7ac59e 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -985,8 +985,7 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp)
return;
}
- port->bh = qemu_bh_new_guarded(flush_queued_data_bh, port,
- &dev->mem_reentrancy_guard);
+ port->bh = virtio_bh_new_guarded(dev, flush_queued_data_bh, port);
port->elem = NULL;
}
--
2.39.3