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[Qemu-devel] [PATCH] intel_iommu: Return error on machines with no PCI
From: |
Mohammed Gamal |
Subject: |
[Qemu-devel] [PATCH] intel_iommu: Return error on machines with no PCI |
Date: |
Thu, 14 Sep 2017 22:17:27 +0200 |
Starting the following command line causes a segfault
qemu-system-x86_64 -S -machine isapc,accel=kvm -device intel-iommu
This is due to the fact that the machine type 'isapc' doesn't have
a PCI bus, while intel_iommu doesn't check if the machine has PCI support
and subsequently does a null-pointer access. Intel IOMMU shouldn't even work
if the target machine doesn't have PCI.
Add a check for PCI on the given machine type and return an error if PCI
is not supported.
Signed-off-by: Mohammed Gamal <address@hidden>
---
hw/i386/intel_iommu.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 3a5bb0b..fab0b4b 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -3041,6 +3041,13 @@ static void vtd_realize(DeviceState *dev, Error **errp)
}
bus = pcms->bus;
+
+ if (!bus) {
+ error_setg(errp, "Machine-type '%s' does not support PCI",
+ mc->name);
+ return;
+ }
+
x86_iommu->type = TYPE_INTEL;
if (!vtd_decide_config(s, errp)) {
--
1.8.3.1
- [Qemu-devel] [PATCH] intel_iommu: Return error on machines with no PCI,
Mohammed Gamal <=