From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752016AbeBHDVr (ORCPT ); Wed, 7 Feb 2018 22:21:47 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:37288 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750807AbeBHDVq (ORCPT ); Wed, 7 Feb 2018 22:21:46 -0500 From: Jason Wang To: mst@redhat.com Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jason Wang Subject: [PATCH net V2 1/2] ptr_ring: try vmalloc() when kmalloc() fails Date: Thu, 8 Feb 2018 11:21:40 +0800 Message-Id: <1518060101-19071-1-git-send-email-jasowang@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch switch to use kvmalloc_array() for using a vmalloc() fallback to help in case kmalloc() fails. Reported-by: syzbot+e4d4f9ddd4295539735d@syzkaller.appspotmail.com Fixes: 2e0ab8ca83c12 ("ptr_ring: array based FIFO for pointers") Signed-off-by: Jason Wang --- include/linux/ptr_ring.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index 1883d61..9c3b748 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -466,7 +466,7 @@ static inline int ptr_ring_consume_batched_bh(struct ptr_ring *r, static inline void **__ptr_ring_init_queue_alloc(unsigned int size, gfp_t gfp) { - return kcalloc(size, sizeof(void *), gfp); + return kvmalloc_array(size, sizeof(void *), gfp | __GFP_ZERO); } static inline void __ptr_ring_set_size(struct ptr_ring *r, int size) -- 2.7.4