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openSUSE:13.1
xen
521ef8d9-AMD-IOMMU-add-missing-checks.patch
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File 521ef8d9-AMD-IOMMU-add-missing-checks.patch of Package xen
# Commit 3785d30efe8264b899499e0883b10cc434bd0959 # Date 2013-08-29 09:31:37 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> AMD IOMMU: add missing check We shouldn't accept IVHD tables specifying IO-APIC IDs beyond the limit we support (MAX_IO_APICS, currently 128). Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Suravee Suthikulpanit <suravee.suthikulapanit@amd.com> --- a/xen/drivers/passthrough/amd/iommu_acpi.c +++ b/xen/drivers/passthrough/amd/iommu_acpi.c @@ -674,6 +674,13 @@ static u16 __init parse_ivhd_device_spec if ( IO_APIC_ID(apic) != special->handle ) continue; + if ( special->handle >= ARRAY_SIZE(ioapic_sbdf) ) + { + printk(XENLOG_ERR "IVHD Error: IO-APIC %#x entry beyond bounds\n", + special->handle); + return 0; + } + if ( ioapic_sbdf[special->handle].pin_2_idx ) { if ( ioapic_sbdf[special->handle].bdf == bdf &&
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