From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752343AbdCNNZd (ORCPT ); Tue, 14 Mar 2017 09:25:33 -0400 Received: from mx2.suse.de ([195.135.220.15]:40304 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751618AbdCNNQQ (ORCPT ); Tue, 14 Mar 2017 09:16:16 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Vitaly Kuznetsov , "K . Y . Srinivasan" , Jiri Slaby Subject: [PATCH 3.12 34/60] hv: allocate synic pages for all present CPUs Date: Tue, 14 Mar 2017 14:15:25 +0100 Message-Id: <3ee3990aefa1860fca0c00bf1a03ebaab993550e.1489497268.git.jslaby@suse.cz> X-Mailer: git-send-email 2.12.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vitaly Kuznetsov 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 421b8f20d3c381b215f988b42428f56fc3b82405 upstream. It may happen that not all CPUs are online when we do hv_synic_alloc() and in case more CPUs come online later we may try accessing these allocated structures. Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan Signed-off-by: Jiri Slaby --- drivers/hv/hv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 88f4096fa078..3fdb9af08705 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -271,7 +271,7 @@ int hv_synic_alloc(void) size_t size = sizeof(struct tasklet_struct); int cpu; - for_each_online_cpu(cpu) { + for_each_present_cpu(cpu) { hv_context.event_dpc[cpu] = kmalloc(size, GFP_ATOMIC); if (hv_context.event_dpc[cpu] == NULL) { pr_err("Unable to allocate event dpc\n"); @@ -314,7 +314,7 @@ void hv_synic_free(void) { int cpu; - for_each_online_cpu(cpu) + for_each_present_cpu(cpu) hv_synic_free_cpu(cpu); } -- 2.12.0