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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB34CCDB465 for ; Mon, 16 Oct 2023 11:05:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232468AbjJPLFu (ORCPT ); Mon, 16 Oct 2023 07:05:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48360 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231442AbjJPLFr (ORCPT ); Mon, 16 Oct 2023 07:05:47 -0400 Received: from mail-wr1-x429.google.com (mail-wr1-x429.google.com [IPv6:2a00:1450:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62A7AB4 for ; Mon, 16 Oct 2023 04:05:41 -0700 (PDT) Received: by mail-wr1-x429.google.com with SMTP id ffacd0b85a97d-32da4ffd7e5so1015257f8f.0 for ; Mon, 16 Oct 2023 04:05:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697454340; x=1698059140; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=3Syi+h4/GlkdC/FXeBhfgw8IzyShvR4nN+L5IxDsfCY=; b=UivXsDRDu+ORh5PR8x39RRQ+rItPpN9AwqnGdHJUz33bT0RQ0T4ZCSWDWnpDlyIKwb CslmEkTkMNwq8HxQoyZNzY4m7xj02VH9r7Szi0L3uiKMZdE86t/2+wfG1G/lDWqgzUfh iAYdVrAqRRvbtUwQFnRt5xJKD64c7GVZRvNIuJ1oA6tiMMf+oKnplNWQryEi21Yw6TBG okFw2raOJTeA1lHDWK0lG+GqUEqqhhuTp6XJTA0l5G034RehAIhL4jm4nb+IgWSl+QKz NHTd73Dt5hkgV8lBTwEdK5evSlpESJbZ6WsQCzF407ix4KwCAQMwVSe5zfmarR2LTj3E 1sTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697454340; x=1698059140; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=3Syi+h4/GlkdC/FXeBhfgw8IzyShvR4nN+L5IxDsfCY=; b=JJogYGlPwjxeqZsmivVvSJxdaUIIG2+/XJ1JLeizJLqTAbXHcrfg3xv0PwmWjG/W9D 57cHvZ4Cui1ZUidEXHpSs058WHX3EY4ZEWd/Izuyh1kWs4I7ubvcSF6ESciIPrU+HC9M G5nnSc05TxSxvk+KY6CkQxzwOM4MQsG4U4CYMDmLHRxS6ZZQcglwOJt110ewP1S7Wy+m BDiJx47uLGzTV1lwIdJcL9iVuOLzNF4ANy2kwA25FFdeqJjJ5pG+ZLyAO1LdPshNX66i DnxBjvYdbMNG4gjTPRLRBAvxki1qJZEoDBofAY+vqyPTDUlA39jDKiUv3KBOAOuh2G+M BJ8Q== X-Gm-Message-State: AOJu0Yy2Iw3Kk4om7H8I68RkrcN5tPepGfvJ4B3Z9ogn5whz5hCrTYLg /ZvH8uNj+V6S8gvlRs/SKjg= X-Google-Smtp-Source: AGHT+IHcWQxGKBWB6Ru+kU1QqtsJt1pKDdeOgjo/JB9S2wBXG17gJDZ7JSgMTrjK4LS91xjoJXU6Uw== X-Received: by 2002:a05:6000:24c:b0:32d:be70:3779 with SMTP id m12-20020a056000024c00b0032dbe703779mr205799wrz.9.1697454339449; Mon, 16 Oct 2023 04:05:39 -0700 (PDT) Received: from localhost ([2a00:23c5:dc8c:8701:1663:9a35:5a7b:1d76]) by smtp.gmail.com with ESMTPSA id p18-20020a05600c431200b0040642a1df1csm6801770wme.25.2023.10.16.04.05.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Oct 2023 04:05:38 -0700 (PDT) Date: Mon, 16 Oct 2023 12:05:37 +0100 From: Lorenzo Stoakes To: Naresh Kamboju Cc: open list , linux-mm , lkft-triage@lists.linaro.org, "Reviewed-by: Jan Kara" , Alexander Viro , Andy Lutomirski , Christian Brauner , Hugh Dickins , willy@infradead.org, Mike Kravetz , Muchun Song , Andrew Morton , Dan Carpenter , Arnd Bergmann Subject: Re: mm: Unable to handle kernel NULL pointer dereference at virtual address - mmap_region (include/linux/fs.h:580 mm/mmap.c:2946) Message-ID: <48534660-d5f7-45b2-8f99-19c8fb3e51c8@lucifer.local> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 16, 2023 at 03:52:07PM +0530, Naresh Kamboju wrote: > Following kernel crash noticed while running LTP hugetlb and selftests on > qemu-x86_64 and qemu-arm64 running with Linux next 6.6.0-rc6-next-20231016. > > Reported-by: Linux Kernel Functional Testing > Reported-by: Naresh Kamboju > > Test Logs: > ----- [snip] > <4>[ 97.499871] Call trace: > <4>[ 97.500288] mmap_region (include/linux/fs.h:580 mm/mmap.c:2946) OK this is from a patch of mine, and an easy fix (incorrect assumption about vm->vm_file == file). I will put a fix forward tonight. > <4>[ 97.500814] do_mmap (mm/mmap.c:1379) > <4>[ 97.501243] vm_mmap_pgoff (mm/util.c:546) > <4>[ 97.501711] ksys_mmap_pgoff (mm/mmap.c:1425) > <4>[ 97.502166] __arm64_sys_mmap (arch/arm64/kernel/sys.c:21) > <4>[ 97.502634] invoke_syscall (arch/arm64/include/asm/current.h:19 > arch/arm64/kernel/syscall.c:56) > <4>[ 97.503175] el0_svc_common.constprop.0 > (include/linux/thread_info.h:127 (discriminator 2) > arch/arm64/kernel/syscall.c:144 (discriminator 2)) > <4>[ 97.503763] do_el0_svc (arch/arm64/kernel/syscall.c:156) > <4>[ 97.504191] el0_svc (arch/arm64/include/asm/daifflags.h:28 > arch/arm64/kernel/entry-common.c:133 > arch/arm64/kernel/entry-common.c:144 > arch/arm64/kernel/entry-common.c:679) [snip]