From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: [PATCH v3] xen: domain_update_node_affinity: Bail out early if no VCPUs are allocated Date: Thu, 7 Aug 2014 17:28:20 +0100 Message-ID: <1407428900-1172-1-git-send-email-julien.grall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XFQYI-0000s2-1o for xen-devel@lists.xenproject.org; Thu, 07 Aug 2014 16:28:30 +0000 Received: by mail-wi0-f177.google.com with SMTP id ho1so5316682wib.16 for ; Thu, 07 Aug 2014 09:28:28 -0700 (PDT) List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xenproject.org Cc: Juergen Gross , Keir Fraser , ian.campbell@citrix.com, Ian Jackson , Dario Faggioli , Julien Grall , tim@xen.org, George Dunlap , stefano.stabellini@citrix.com, Jan Beulich List-Id: xen-devel@lists.xenproject.org The commit "move domain to cpupool0 before destroying it" make Xen crashes when a domain is destroyed with d->vcpus allocated but no VCPU initialized. Assertion '!cpumask_empty(dom_cpumask)' failed at domain.c:452 Xen call trace: [<00207bd8>] domain_update_node_affinity+0x10c/0x238 (PC) [<00000004>] 00000004 (LR) [<00226870>] sched_move_domain+0x3cc/0x42c [<0020925c>] domain_kill+0xc8/0x178 [<00206a0c>] do_domctl+0xaac/0x15e4 [<002529c0>] do_trap_hypervisor+0xc5c/0xf94 [<002559f0>] return_from_trap+0/0x4 Bail out early if there is d->VCPU is not allocated or VCPU 0 has not been initialized. Signed-off-by: Julien Grall Cc: George Dunlap Cc: Dario Faggioli Cc: Juergen Gross Cc: Ian Campbell Cc: Ian Jackson Cc: Jan Beulich Cc: Keir Fraser Cc: Tim Deegan --- This patch should be backported to Xen 4.4 Changes in v3: - Change commit message - Bail out early rather than modifying the ASSERT --- xen/common/domain.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/common/domain.c b/xen/common/domain.c index d7a84cf..f0d93e9 100644 --- a/xen/common/domain.c +++ b/xen/common/domain.c @@ -415,6 +415,9 @@ void domain_update_node_affinity(struct domain *d) struct vcpu *v; unsigned int cpu; + if ( !d->vcpu || !d->vcpu[0] ) + return; + if ( !zalloc_cpumask_var(&dom_cpumask) ) return; if ( !zalloc_cpumask_var(&dom_cpumask_soft) ) -- 1.7.10.4