From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0510C07E99 for ; Mon, 5 Jul 2021 13:57:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CCB76145D for ; Mon, 5 Jul 2021 13:57:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231264AbhGEOAH (ORCPT ); Mon, 5 Jul 2021 10:00:07 -0400 Received: from mail-m17639.qiye.163.com ([59.111.176.39]:52122 "EHLO mail-m17639.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230414AbhGEOAG (ORCPT ); Mon, 5 Jul 2021 10:00:06 -0400 DKIM-Signature: a=rsa-sha256; b=HNR+dXzxrdrcR8OUrPosGj3LIRGG4dc6wbrY97tqVS/Lh/hhRI0sE1ExBEuCN5k5XN3EZmrw1GYb7ouQ+HGeENpTg1yKqsXAAJnRr9FZdZhmrR9OnxNbMfhJBtauGg+kIcuGbO1RG6n1qwRrBhGJRUgKldr4HMaGh5P9ol/Au10=; s=default; c=relaxed/relaxed; d=vivo.com; v=1; bh=Hj7ANVvmsqIMnUcnu2LhSgHEe4XeE1gdx8oBVcDVPhk=; h=date:mime-version:subject:message-id:from; Received: from vivo-HP-ProDesk-680-G4-PCI-MT.vivo.xyz (unknown [58.251.74.232]) by mail-m17639.qiye.163.com (Hmail) with ESMTPA id 440A6380063; Mon, 5 Jul 2021 21:57:28 +0800 (CST) From: Wang Qing To: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Wang Qing Subject: [PATCH] mm: add GFP_ATOMIC flag after local_lock_irqsave Date: Mon, 5 Jul 2021 21:57:12 +0800 Message-Id: <1625493432-9945-1-git-send-email-wangqing@vivo.com> X-Mailer: git-send-email 2.7.4 X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZS1VLWVdZKFlBSE83V1ktWUFJV1kPCR oVCBIfWUFZQhlLGVZMGh5NGkpOHUwZHkhVEwETFhoSFyQUDg9ZV1kWGg8SFR0UWUFZT0tIVUpKS0 hKQ1VLWQY+ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6MTI6Chw6ET9LIhk1SCMpCB0O FBUKCxNVSlVKTUlOT0JIT09DTUJKVTMWGhIXVQwaFRwKEhUcOw0SDRRVGBQWRVlXWRILWUFZTkNV SU5KVUxPVUlISVlXWQgBWUFKSE9KNwY+ X-HM-Tid: 0a7a76f5a6d4d994kuws440a6380063 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use GFP_ATOMIC when local_lock_irqsave in __alloc_pages_bulk Reported-by: syzbot+e45919db2eab5e837646@syzkaller.appspotmail.com Signed-off-by: Wang Qing --- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d6e94cc..3016ba5 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5309,7 +5309,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid, } nr_account++; - prep_new_page(page, 0, gfp, 0); + prep_new_page(page, 0, gfp | GFP_ATOMIC, 0); if (page_list) list_add(&page->lru, page_list); else -- 2.7.4