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xen
23505-x86-cpu-add-arg-check.patch
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File 23505-x86-cpu-add-arg-check.patch of Package xen
# HG changeset patch # User Keir Fraser <keir@xen.org> # Date 1307689724 -3600 # Node ID 5a557fda70a99d287735b53957e865c8dac0e351 # Parent c34604d5a29336d902837542b915d3b09b27a361 x86: Fix argument checking in (privileged) function cpu_add(). Thanks to John McDermott <john.mcdermott@nrl.navy.mil> for spotting. Signed-off-by: Keir Fraser <keir@xen.org> --- a/xen/arch/x86/smpboot.c +++ b/xen/arch/x86/smpboot.c @@ -1476,7 +1476,9 @@ int cpu_add(uint32_t apic_id, uint32_t a dprintk(XENLOG_DEBUG, "cpu_add apic_id %x acpi_id %x pxm %x\n", apic_id, acpi_id, pxm); - if ( acpi_id > MAX_MADT_ENTRIES || apic_id > MAX_APICS || pxm > 256 ) + if ( (acpi_id >= MAX_MADT_ENTRIES) || + (apic_id >= MAX_APICS) || + (pxm >= 256) ) return -EINVAL; /* Detect if the cpu has been added before */
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