From cb34a2fa162184b150d48a3b6f385bacbec22ce7 Mon Sep 17 00:00:00 2001 From: Tamas K Lengyel Date: Mon, 18 Jan 2021 10:23:06 -0700 Subject: [PATCH] x86/mem_sharing: fix uninitialized 'preempted' variable UBSAN catches an uninitialized use of the 'preempted' variable in fork_hap_allocation when there is no preemption. Fixes: 41548c5472a ("mem_sharing: VM forking") Signed-off-by: Tamas K Lengyel Acked-by: Andrew Cooper --- xen/arch/x86/mm/mem_sharing.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index c8a6d11b90..adaeab4612 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1644,7 +1644,7 @@ static int copy_vcpu_settings(struct domain *cd, const struct domain *d) static int fork_hap_allocation(struct domain *cd, struct domain *d) { int rc; - bool preempted; + bool preempted = false; unsigned long mb = hap_get_allocation(d); if ( mb == hap_get_allocation(cd) ) -- 2.30.2