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=-8.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 1A5C1C433DB for ; Sun, 7 Feb 2021 12:21:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6BB164DF2 for ; Sun, 7 Feb 2021 12:21:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229720AbhBGMVB (ORCPT ); Sun, 7 Feb 2021 07:21:01 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:34872 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229536AbhBGMUy (ORCPT ); Sun, 7 Feb 2021 07:20:54 -0500 Received: by mail-io1-f69.google.com with SMTP id a1so9779276ios.2 for ; Sun, 07 Feb 2021 04:20:37 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=uy5iahHtrkhtuGWBUOjHZCHJGctmLx/PrUVxcGcyiTc=; b=O6gjdSmK6BkzkOANJTy2eg9dqH6QENw5nWjqt7wyQj1UDIdKhxayQ5cMlozyRCbIL0 bSsQp5dC1Fn4ug6WbIxhToUjHtvkXUisqZSCMiddl82Bu/4ZUBFvAO/7Zrlbgt8w7HvZ FTCDaTtn8IP0z8MpHrxgdlBeylaP9bPdNc7N4K1jbD0zIsvwSFGBBx0f7nf8+4KcJHY3 ce7ekLflrzTIKLu1ASJND+F2atE1NNsNV4piw2feszWn8N2y+r+og3ExPTO0pMQYHePq 4/mZ5OR0voWsOG+6mw8SYv7QMgde1vtQ6+eZpZtvVtNwQyB4+iY1WXrU1yG/P5drK+8K LTJA== X-Gm-Message-State: AOAM530bv0qo3PhKf8pqP15oGSsBx6yG8MrUZXetFYCt/E3TwC8wuj0x PchRAHWgV96N7rX7XwGIjbahR+l8Sg1F+xnmNS2dgJsMATuY X-Google-Smtp-Source: ABdhPJxhiwze/IfwTbaJblPobCBE7W6hqeyttA1ll/pmhbjzexydnHB4iTyg4B1K0soRmcTpDZj0cmoDxovWZeW/ylotDFoV/DZs MIME-Version: 1.0 X-Received: by 2002:a92:d0d:: with SMTP id 13mr11249451iln.36.1612700412606; Sun, 07 Feb 2021 04:20:12 -0800 (PST) Date: Sun, 07 Feb 2021 04:20:12 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000038fcd705babe13b5@google.com> Subject: KMSAN: uninit-value in ext4_inode_journal_mode From: syzbot To: glider@google.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 73d62e81 kmsan: random: prevent boot-time reports in _mix_.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=152188c4d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=df698232b2ac45c9 dashboard link: https://syzkaller.appspot.com/bug?extid=b2ffafb709f9a29ec5b4 compiler: Debian clang version 11.0.1-2 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b2ffafb709f9a29ec5b4@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ext4_inode_journal_mode+0x28b/0x4f0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/ext4_jbd2.c:16 CPU: 1 PID: 8577 Comm: syz-executor.0 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack syzkaller/managers/upstream-kmsan-gce-386/kernel/lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 syzkaller/managers/upstream-kmsan-gce-386/kernel/lib/dump_stack.c:118 kmsan_report+0xfb/0x1e0 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/kmsan/kmsan_instr.c:197 ext4_inode_journal_mode+0x28b/0x4f0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/ext4_jbd2.c:16 ext4_should_journal_data syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/ext4_jbd2.h:467 [inline] ext4_evict_inode+0x1bb/0x2b30 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/inode.c:201 evict+0x4b5/0xec0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:578 iput_final syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:1654 [inline] iput+0xb06/0xec0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:1680 __ext4_new_inode+0x3dd2/0x9c70 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/ialloc.c:1354 ext4_create+0x47e/0x960 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/namei.c:2619 lookup_open syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3104 [inline] open_last_lookups syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3178 [inline] path_openat+0x2b71/0x6a30 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3366 do_filp_open+0x2b8/0x710 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3396 do_sys_openat2+0xa92/0x1150 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/open.c:1168 do_sys_open syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/open.c:1184 [inline] __do_compat_sys_openat syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/open.c:1242 [inline] __se_compat_sys_openat+0x2ae/0x310 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/open.c:1240 __ia32_compat_sys_openat+0x56/0x70 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/open.c:1240 do_syscall_32_irqs_on syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f79549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f55525fc EFLAGS: 00000296 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000200004c0 RDX: 0000000000000042 RSI: 0000000000000180 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/kmsan/kmsan.c:121 kmsan_alloc_page+0xd3/0x1f0 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/kmsan/kmsan_shadow.c:274 __alloc_pages_nodemask+0x827/0xf90 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/page_alloc.c:4989 alloc_pages_current+0x7b6/0xb60 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/mempolicy.c:2271 alloc_pages syzkaller/managers/upstream-kmsan-gce-386/kernel/./include/linux/gfp.h:547 [inline] alloc_slab_page syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:1630 [inline] allocate_slab+0x346/0x11a0 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:1773 new_slab syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:1834 [inline] new_slab_objects syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2593 [inline] ___slab_alloc+0xd42/0x1930 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2756 __slab_alloc syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2796 [inline] slab_alloc_node syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2871 [inline] slab_alloc syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2915 [inline] kmem_cache_alloc+0xb71/0x1040 syzkaller/managers/upstream-kmsan-gce-386/kernel/mm/slub.c:2920 ext4_alloc_inode+0x5e/0x870 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/super.c:1294 alloc_inode syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:234 [inline] new_inode_pseudo+0xa7/0x580 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:930 new_inode+0x5a/0x3d0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/inode.c:959 __ext4_new_inode+0x3a0/0x9c70 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/ialloc.c:956 ext4_symlink+0x8a4/0x19a0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/ext4/namei.c:3336 vfs_symlink+0x6c4/0x8f0 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3960 do_symlinkat+0x389/0x930 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:3987 __do_sys_symlink syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:4006 [inline] __se_sys_symlink+0x74/0x90 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:4004 __ia32_sys_symlink+0x3e/0x60 syzkaller/managers/upstream-kmsan-gce-386/kernel/fs/namei.c:4004 do_syscall_32_irqs_on syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:80 [inline] __do_fast_syscall_32+0x102/0x160 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:139 do_fast_syscall_32+0x6a/0xc0 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:162 do_SYSENTER_32+0x73/0x90 syzkaller/managers/upstream-kmsan-gce-386/kernel/arch/x86/entry/common.c:205 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c ===================================================== --- This report is generated by a bot. 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