From: Tamas K Lengyel Date: Thu, 21 Jan 2021 15:20:27 +0000 (+0100) Subject: x86/mem_sharing: fix uninitialized 'preempted' variable X-Git-Tag: archive/raspbian/4.14.1+11-gb0b734a8b3-1+rpi1^2~61^2~3 X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success/%22http:/www.example.com/cgi/success?a=commitdiff_plain;h=9028fd493a69b1e216239542d986240fa1ea7167;p=xen.git 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 master commit: cb34a2fa162184b150d48a3b6f385bacbec22ce7 master date: 2021-01-18 17:50:11 +0000 --- diff --git a/xen/arch/x86/mm/mem_sharing.c b/xen/arch/x86/mm/mem_sharing.c index c428fd16ce..468bbcfa67 100644 --- a/xen/arch/x86/mm/mem_sharing.c +++ b/xen/arch/x86/mm/mem_sharing.c @@ -1628,7 +1628,7 @@ 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) )