[PATCH] qemu: Avoid crash in qemuDomainCheckCPU with unknown host CPU

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

When we don't have any information about host CPU (for example when
running on an aarch64 host), the virQEMUCapsGetHostModel would return
NULL.

Fixes: https://gitlab.com/libvirt/libvirt/-/issues/747
Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
 src/qemu/qemu_domain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index cf05dca55a..df1ed0223d 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -11430,6 +11430,7 @@ qemuDomainCheckCPU(virArch arch,
     /* Force compat check if the CPU model is not found in qemuCaps or
      * we don't have host CPU data from QEMU */
     if (!cpu->model ||
+        !hypervisorCPU ||
         hypervisorCPU->fallback != VIR_CPU_FALLBACK_FORBID ||
         virQEMUCapsGetCPUBlockers(qemuCaps, virtType,
                                   cpu->model, &blockers) < 0)
-- 
2.48.1