diff options
Diffstat (limited to 'system/xen/xsa/xsa237-4.9-0001-x86-dont-allow-MSI-pIRQ-mapping-on-unowned-device.patch')
| -rw-r--r-- | system/xen/xsa/xsa237-4.9-0001-x86-dont-allow-MSI-pIRQ-mapping-on-unowned-device.patch | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/system/xen/xsa/xsa237-4.9-0001-x86-dont-allow-MSI-pIRQ-mapping-on-unowned-device.patch b/system/xen/xsa/xsa237-4.9-0001-x86-dont-allow-MSI-pIRQ-mapping-on-unowned-device.patch new file mode 100644 index 0000000000..7c9dff9672 --- /dev/null +++ b/system/xen/xsa/xsa237-4.9-0001-x86-dont-allow-MSI-pIRQ-mapping-on-unowned-device.patch @@ -0,0 +1,27 @@ +From: Jan Beulich <jbeulich@suse.com> +Subject: x86: don't allow MSI pIRQ mapping on unowned device + +MSI setup should be permitted only for existing devices owned by the +respective guest (the operation may still be carried out by the domain +controlling that guest). + +This is part of XSA-237. + +Reported-by: HW42 <hw42@ipsumj.de> +Signed-off-by: Jan Beulich <jbeulich@suse.com> +Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> + +--- a/xen/arch/x86/irq.c ++++ b/xen/arch/x86/irq.c +@@ -1963,7 +1963,10 @@ int map_domain_pirq( + if ( !cpu_has_apic ) + goto done; + +- pdev = pci_get_pdev(msi->seg, msi->bus, msi->devfn); ++ pdev = pci_get_pdev_by_domain(d, msi->seg, msi->bus, msi->devfn); ++ if ( !pdev ) ++ goto done; ++ + ret = pci_enable_msi(msi, &msi_desc); + if ( ret ) + { |