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[PATCH] msi: fix MSI vector limit check in msi_set_mask()
From: |
Jagannathan Raman |
Subject: |
[PATCH] msi: fix MSI vector limit check in msi_set_mask() |
Date: |
Thu, 23 Jun 2022 11:38:44 -0400 |
MSI supports a maximum of PCI_MSI_VECTORS_MAX vectors - from 0 to
PCI_MSI_VECTORS_MAX - 1.
msi_set_mask() was previously using PCI_MSI_VECTORS_MAX as the upper
limit for MSI vectors. Fix the upper limit to PCI_MSI_VECTORS_MAX - 1.
Fixes: Coverity CID 1490141
Fixes: 08cf3dc61199 vfio-user: handle device interrupts
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
---
hw/pci/msi.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/pci/msi.c b/hw/pci/msi.c
index 5c471b9616..058d1d1ef1 100644
--- a/hw/pci/msi.c
+++ b/hw/pci/msi.c
@@ -322,9 +322,9 @@ void msi_set_mask(PCIDevice *dev, int vector, bool mask,
Error **errp)
bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
uint32_t irq_state, vector_mask, pending;
- if (vector > PCI_MSI_VECTORS_MAX) {
+ if (vector >= PCI_MSI_VECTORS_MAX) {
error_setg(errp, "msi: vector %d not allocated. max vector is %d",
- vector, PCI_MSI_VECTORS_MAX);
+ vector, (PCI_MSI_VECTORS_MAX - 1));
return;
}
--
2.20.1
- [PATCH] msi: fix MSI vector limit check in msi_set_mask(),
Jagannathan Raman <=