Received: by 2002:a05:6a10:f3d0:0:0:0:0 with SMTP id a16csp3836469pxv; Mon, 5 Jul 2021 06:59:18 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwpr5IuCq6YK323MLhaTQfHUcSj360eBNeX7PjMWrV1wC0jDla09UMGd3TFVi/EjYbs18Gw X-Received: by 2002:a92:d8cb:: with SMTP id l11mr10937752ilo.163.1625493557861; Mon, 05 Jul 2021 06:59:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1625493557; cv=none; d=google.com; s=arc-20160816; b=kOKedCC7EZiob2WGcRRiddvl4Mas2pRnpzw0N2uPNBsAi2AnOM1JWNIM1o6Y7Qxmc5 XH2hDCZGXOQFOgn7Htb/A4632WhqPz/oN22EiS0sLI8fHe4c5+MYWlfUvB+nUYmdHqhO WB2eUvAKsbvw/9fRLQoc7HCz/739JBScZoDg4D/7vqxtL47Jl1vYf3gPhjjTdEAXsGNH 8BGDEHZtiiGbyY8IUyYHe3wOuXw5ZADgqPTQqsm1WyepvF4Jl2LdkMonB+qbp43kOuFY FeX7M0ZcV87c+8BFxm8dsr2VOZvI7lnHAdqTZ7I5JPnXnGNn+kbsW4WeM6TqNAs7oB2P GTRw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:message-id:date:subject:cc:to:from :dkim-signature; bh=Hj7ANVvmsqIMnUcnu2LhSgHEe4XeE1gdx8oBVcDVPhk=; b=qlCuGTlt30vaQ4sj+kDE/1MgiJTMtXUtbKLB38OLYSEgUbaVs9xJdzV0jeXe0m7Oxc ZUl4VZi8TYBxAAzl0sHbzCdqs3AOcVeMpWuE/gS4uaacPCigMe4RWW374b+c+LHcerVm Pi7IkVNxOa2g+6qUiSzE/IB1ifaQ/ueKC+f0afRgLHOuAI4KpnbH1Elu1AphU2YSk2in DKrCy3CXKbzu86XnBnSx8GXV+S/TTttiZ5GWkKAVjNXSDQCxTIlGrP5bqsIoY/DAL7++ o6BYZj85XgqtlcAh+jZQtCqFX9+Nn9p3CouwFNEvadwLgvN5KSXdqey9auBtpjk7HGW9 8H3A== ARC-Authentication-Results: i=1; mx.google.com; dkim=temperror (no key for signature) header.i=@vivo.com header.s=default header.b=HNR+dXzx; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=vivo.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id e127si14722361iof.13.2021.07.05.06.59.06; Mon, 05 Jul 2021 06:59:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=temperror (no key for signature) header.i=@vivo.com header.s=default header.b=HNR+dXzx; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=vivo.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231157AbhGEOAH (ORCPT + 99 others); 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