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hw/audio/intel-hda: Restrict DMA engine to memories (not MMIO devices)

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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
Message-Id: <20211218160912.1591633-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2021-12-18 17:09:11 +01:00 committed by Thomas Huth
parent be5a8cf347
commit 79fa99831d
1 changed files with 1 additions and 1 deletions
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hw/audio/intel-hda.c
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@ -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;