vl.c: Fail gracefully if no machine is found
machine defaults to find_default_machine(),
then gets overridden via -M and machine_parse().
If no -M is specified and find_default_machine() returns NULL
(when no machine compiled in), exit with an error.
Avoids a segfault when setting machine->max_cpus.
Signed-off-by: Andreas Färber <[email protected]>
Signed-off-by: Anthony Liguori <[email protected]>
diff --git a/vl.c b/vl.c
index f169aac..16fa222 100644
--- a/vl.c
+++ b/vl.c
@@ -3089,6 +3089,11 @@
data_dir = CONFIG_QEMU_DATADIR;
}
+ if (machine == NULL) {
+ fprintf(stderr, "No machine found.\n");
+ exit(1);
+ }
+
/*
* Default to max_cpus = smp_cpus, in case the user doesn't
* specify a max_cpus value.
