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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 E662BC433E2 for ; Tue, 23 Jun 2020 21:16:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C0D8720702 for ; Tue, 23 Jun 2020 21:16:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592947018; bh=DDOWVhcevjEc+OJE8PaFKULsj0HRiL3698dx+Sh4vO0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=n6xLEKq6yYj2dHRAj2KCg1OLPH5GULHrT16BihUZVPlp/dEQdSPYoSIKueRHmWTDP A6eNoCLfEootBZ9Ej7lbMeC1chBi9BY8DuS3wwhRuuhSWu0LCpWOjhK5L2UlaBa91g BrPB/F32D6KhOLFxdwZQ+476+3UEW2MrFmqx6kY4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390701AbgFWVQ4 (ORCPT ); Tue, 23 Jun 2020 17:16:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:46686 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390478AbgFWU1N (ORCPT ); Tue, 23 Jun 2020 16:27:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7A475206C3; Tue, 23 Jun 2020 20:27:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592944033; bh=DDOWVhcevjEc+OJE8PaFKULsj0HRiL3698dx+Sh4vO0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ksTXMfHpWO/YXZsgaEy+I65gUTYGJEIkElqTDLR+TZPh9Uir8g7Z+WvnU4LZ6Wcn3 iOyRVxxJvahtDIAx08YqGrDoSJcG2+pBaIwTVW2XRbGJ0cHJsAeAjVkKQu6h9lnKTs gQO69iWPYpegBeERodU0x62+UACeQNcR0QTUl/CQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Feng Tang , Corey Minyard , Sasha Levin Subject: [PATCH 5.4 147/314] ipmi: use vzalloc instead of kmalloc for user creation Date: Tue, 23 Jun 2020 21:55:42 +0200 Message-Id: <20200623195345.871487095@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195338.770401005@linuxfoundation.org> References: <20200623195338.770401005@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Feng Tang [ Upstream commit 7c47a219b95d0e06b5ef5fcc7bad807895015eac ] We met mulitple times of failure of staring bmc-watchdog, due to the runtime memory allocation failure of order 4. bmc-watchdog: page allocation failure: order:4, mode:0x40cc0(GFP_KERNEL|__GFP_COMP), nodemask=(null),cpuset=/,mems_allowed=0-1 CPU: 1 PID: 2571 Comm: bmc-watchdog Not tainted 5.5.0-00045-g7d6bb61d6188c #1 Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.00.01.0015.110720180833 11/07/2018 Call Trace: dump_stack+0x66/0x8b warn_alloc+0xfe/0x160 __alloc_pages_slowpath+0xd3e/0xd80 __alloc_pages_nodemask+0x2f0/0x340 kmalloc_order+0x18/0x70 kmalloc_order_trace+0x1d/0xb0 ipmi_create_user+0x55/0x2c0 [ipmi_msghandler] ipmi_open+0x72/0x110 [ipmi_devintf] chrdev_open+0xcb/0x1e0 do_dentry_open+0x1ce/0x380 path_openat+0x305/0x14f0 do_filp_open+0x9b/0x110 do_sys_open+0x1bd/0x250 do_syscall_64+0x5b/0x1f0 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Using vzalloc/vfree for creating ipmi_user heals the problem Thanks to Stephen Rothwell for finding the vmalloc.h inclusion issue. Signed-off-by: Feng Tang Signed-off-by: Corey Minyard Signed-off-by: Sasha Levin --- drivers/char/ipmi/ipmi_msghandler.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 90f5292e2051c..ac656a6d5daf1 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -33,6 +33,7 @@ #include #include #include +#include #define IPMI_DRIVER_VERSION "39.2" @@ -1170,7 +1171,7 @@ static void free_user_work(struct work_struct *work) remove_work); cleanup_srcu_struct(&user->release_barrier); - kfree(user); + vfree(user); } int ipmi_create_user(unsigned int if_num, @@ -1202,7 +1203,7 @@ int ipmi_create_user(unsigned int if_num, if (rv) return rv; - new_user = kmalloc(sizeof(*new_user), GFP_KERNEL); + new_user = vzalloc(sizeof(*new_user)); if (!new_user) return -ENOMEM; @@ -1249,7 +1250,7 @@ int ipmi_create_user(unsigned int if_num, out_kfree: srcu_read_unlock(&ipmi_interfaces_srcu, index); - kfree(new_user); + vfree(new_user); return rv; } EXPORT_SYMBOL(ipmi_create_user); -- 2.25.1