From patchwork Tue Jun 23 19:56:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 223426 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,URIBL_BLOCKED,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 B3356C433DF for ; Tue, 23 Jun 2020 20:38:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D42421582 for ; Tue, 23 Jun 2020 20:38:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592944696; bh=hdGBFCYcuW2mHMvmT1HAclvF/VBwBp9BitV8pAwPeWc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pR5FGWBN5Mk550ulInYvAr7R7bC8cFyNnMdhlc+Yvp82yj2hCKn601ZhB/qEZ6sN4 sKr8tWejcM+79VpCpCG+Z96WOaVvLESu5b+4yNxE4Q0R0NX1j0uY6crWEm1ppIeVP3 Jc4xqwyZWtP3UmpCuaxi3sYa6ZQAKYapCCKAu77I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391933AbgFWUiO (ORCPT ); Tue, 23 Jun 2020 16:38:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:33630 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391927AbgFWUiL (ORCPT ); Tue, 23 Jun 2020 16:38:11 -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 E458D21531; Tue, 23 Jun 2020 20:38:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592944691; bh=hdGBFCYcuW2mHMvmT1HAclvF/VBwBp9BitV8pAwPeWc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XUEb+8pdLeDbqV6ZUrk3Oc0TDcorbgCTq0i/F7/lJji+a0xdwR5VPYEgDek3GABKE cp9dUVuZ703UPjlrUlFeVeyKt7oHwY9aU43Bo9YWr+PwJs37jZMINY9kI5IFYYQk0x ND5chNPbYarjenJshfT2Ws5M+vJlxXXbc4INsJNQ= 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 4.19 087/206] ipmi: use vzalloc instead of kmalloc for user creation Date: Tue, 23 Jun 2020 21:56:55 +0200 Message-Id: <20200623195321.230431462@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195316.864547658@linuxfoundation.org> References: <20200623195316.864547658@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 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 69734b1df7927..cb85516e1eb3c 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -30,6 +30,7 @@ #include #include #include +#include #define PFX "IPMI message handler: " @@ -1089,7 +1090,7 @@ 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, @@ -1121,7 +1122,7 @@ 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; @@ -1170,7 +1171,7 @@ 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);