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[PATCH 1/6] hw/usb/hcd-xhci-pci: Don't trigger MSI on higher vector than
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From: |
Phil Dennis-Jordan |
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Subject: |
[PATCH 1/6] hw/usb/hcd-xhci-pci: Don't trigger MSI on higher vector than allocated |
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Date: |
Sun, 8 Dec 2024 20:16:41 +0100 |
QEMU would crash with a failed assertion if the XHCI controller
attempted to raise the interrupt on a higher vector than the highest
configured for the device by the guest driver.
This change adds a check so the interrupt is dropped instead of crashing
the VM.
Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
---
hw/usb/hcd-xhci-pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/usb/hcd-xhci-pci.c b/hw/usb/hcd-xhci-pci.c
index a039f5778a6..376635e889b 100644
--- a/hw/usb/hcd-xhci-pci.c
+++ b/hw/usb/hcd-xhci-pci.c
@@ -73,7 +73,7 @@ static bool xhci_pci_intr_raise(XHCIState *xhci, int n, bool
level)
return true;
}
- if (msi_enabled(pci_dev) && level) {
+ if (msi_enabled(pci_dev) && level && n <
msi_nr_vectors_allocated(pci_dev)) {
msi_notify(pci_dev, n);
return true;
}
--
2.39.5 (Apple Git-154)