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From 79fa99831debc9782087e834382c577215f2f511 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Sat, 18 Dec 2021 17:09:11 +0100
Subject: [PATCH] hw/audio/intel-hda: Restrict DMA engine to memories (not MMIO
devices)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit
Issue #542 reports a reentrancy problem when the DMA engine accesses
the HDA controller I/O registers. Fix by restricting the DMA engine
to memories regions (forbidding MMIO devices such the HDA controller).
Reported-by: OSS-Fuzz (Issue 28435)
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/542
CVE: CVE-2021-3611
Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=patch;h=79fa99831debc9782087e834382c577215f2f511]
Message-Id: <20211218160912.1591633-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Bhabu Bindu <bhabu.bindu@kpit.com>
---
hw/audio/intel-hda.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/audio/intel-hda.c b/hw/audio/intel-hda.c
index 47a36ac..78a47bc 100644
--- a/hw/audio/intel-hda.c
+++ b/hw/audio/intel-hda.c
@@ -345,7 +345,7 @@ static void intel_hda_corb_run(IntelHDAState *d)
static void intel_hda_response(HDACodecDevice *dev, bool solicited, uint32_t response)
{
- const MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
+ const MemTxAttrs attrs = { .memory = true };
HDACodecBus *bus = HDA_BUS(dev->qdev.parent_bus);
IntelHDAState *d = container_of(bus, IntelHDAState, codecs);
hwaddr addr;
--
1.8.3.1
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