[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH for-4.12] xen/arm: domain_build: Require the property "cpus" when building a domU
The 3rd argument of function dt_property_read_u32() is only valid when the call succeeded. So we cannot assume the value will not be modifed in case of failure. The documentation of Dom0less does not give a default value when the property "cpus" is not set. So require the property in the configuration. Coverity-ID: 1476825 Signed-off-by: Julien Grall <julien.grall@xxxxxxx> --- xen/arch/arm/domain_build.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 31af989e63..0d93042c5e 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -2069,7 +2069,6 @@ void __init create_domUs(void) .arch.gic_version = XEN_DOMCTL_CONFIG_GIC_NATIVE, .arch.nr_spis = 0, .flags = XEN_DOMCTL_CDF_hvm_guest | XEN_DOMCTL_CDF_hap, - .max_vcpus = 1, .max_evtchn_port = -1, .max_grant_frames = 64, .max_maptrack_frames = 1024, @@ -2080,7 +2079,9 @@ void __init create_domUs(void) if ( dt_property_read_bool(node, "vpl011") ) d_cfg.arch.nr_spis = GUEST_VPL011_SPI - 32 + 1; - dt_property_read_u32(node, "cpus", &d_cfg.max_vcpus); + + if ( !dt_property_read_u32(node, "cpus", &d_cfg.max_vcpus) ) + panic("Missing property 'cpus' for domain %s", dt_node_name(node)); d = domain_create(++max_init_domid, &d_cfg, false); if ( IS_ERR(d) ) -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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