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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7301CC4332F for ; Thu, 18 Nov 2021 14:20:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2291F613DB for ; Thu, 18 Nov 2021 14:20:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2291F613DB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id B0EEE6B0073; Thu, 18 Nov 2021 09:20:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id ABCC36B0074; Thu, 18 Nov 2021 09:20:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9AC8B6B0078; Thu, 18 Nov 2021 09:20:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0239.hostedemail.com [216.40.44.239]) by kanga.kvack.org (Postfix) with ESMTP id 8D2096B0073 for ; Thu, 18 Nov 2021 09:20:37 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 398A818155825 for ; Thu, 18 Nov 2021 14:20:27 +0000 (UTC) X-FDA: 78822261252.24.33DFD2B Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) by imf05.hostedemail.com (Postfix) with ESMTP id 448F55092EDC for ; Thu, 18 Nov 2021 14:20:25 +0000 (UTC) Received: by mail-io1-f70.google.com with SMTP id m6-20020a0566022e8600b005ec18906edaso3653197iow.6 for ; Thu, 18 Nov 2021 06:20:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=z/DzrfesZMNqVRgfzsy+n7n7C2p0bhPR2vbMBVnOazQ=; b=znyzZJMvVM7wOC0aNL/dC8vBTnUmjOzqcYrcYg8yIJjpUJA/VQY/l7ziMhvfRGCBaK xdZXFnnEbXHErAcj4jjsPgdMX1iNpIQ5tmJ2A9NnGN9vggmfwn3g7EWR79y3LA76hZey 5vLQzPVFPaS4WAiFcR+d0rFcRb0shtwZUIY8qNGTBuqNWMn4QVZYG9zo7Mjn29CFm9lo 5yUsVS9YpSZUUclo+Rs2MX03so8KXpityo7yu0qdwB8JQo/s9/RNCafSvtWCWByEv6+I 1Luh6mO35O9RdWTSOhRajtvrfHtBF2AVtldXBuIaCdEN+nRNaArNz/6VvNkLOHOZ7DHJ DuTg== X-Gm-Message-State: AOAM530OEmSn8Vd5MZLctzBRqh50jqHrtw9rk2arykO8muhQVd/8no+e Uh5habn+JMGIZjCJbAyoyQhXGGhpEyDiwd2mOyzmDQ0/FgB7 X-Google-Smtp-Source: ABdhPJywu7TSs4tjbweXuYkztpX+8zVmrqg6b3dRdQyjopacGVSODIs/g7mj4q7Xx859qWAJmtfUgNII7n2IthgZWzeLhvQilL8W MIME-Version: 1.0 X-Received: by 2002:a02:8663:: with SMTP id e90mr20365886jai.14.1637245226351; Thu, 18 Nov 2021 06:20:26 -0800 (PST) Date: Thu, 18 Nov 2021 06:20:26 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000020805d05d110dc77@google.com> Subject: [syzbot] KCSAN: data-race in flush_tlb_batched_pending / try_to_unmap_one From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 448F55092EDC X-Stat-Signature: m96rmugexyg5xqt81ozghtkneoprzheb Authentication-Results: imf05.hostedemail.com; dkim=none; spf=pass (imf05.hostedemail.com: domain of 3KmGWYQkbAFkJPQB1CC5I1GG94.7FF7C5LJ5I3FEK5EK.3FD@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.70 as permitted sender) smtp.mailfrom=3KmGWYQkbAFkJPQB1CC5I1GG94.7FF7C5LJ5I3FEK5EK.3FD@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none) X-HE-Tag: 1637245225-818964 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000034, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hello, syzbot found the following issue on: HEAD commit: 42eb8fdac2fc Merge tag 'gfs2-v5.16-rc2-fixes' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13160026b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a70237460d215073 dashboard link: https://syzkaller.appspot.com/bug?extid=aa5bebed695edaccf0df compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 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+aa5bebed695edaccf0df@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in flush_tlb_batched_pending / try_to_unmap_one write to 0xffff8881072cfbbc of 1 bytes by task 17406 on cpu 1: flush_tlb_batched_pending+0x5f/0x80 mm/rmap.c:691 madvise_free_pte_range+0xee/0x7d0 mm/madvise.c:594 walk_pmd_range mm/pagewalk.c:128 [inline] walk_pud_range mm/pagewalk.c:205 [inline] walk_p4d_range mm/pagewalk.c:240 [inline] walk_pgd_range mm/pagewalk.c:277 [inline] __walk_page_range+0x981/0x1160 mm/pagewalk.c:379 walk_page_range+0x131/0x300 mm/pagewalk.c:475 madvise_free_single_vma mm/madvise.c:734 [inline] madvise_dontneed_free mm/madvise.c:822 [inline] madvise_vma mm/madvise.c:996 [inline] do_madvise+0xe4a/0x1140 mm/madvise.c:1202 __do_sys_madvise mm/madvise.c:1228 [inline] __se_sys_madvise mm/madvise.c:1226 [inline] __x64_sys_madvise+0x5d/0x70 mm/madvise.c:1226 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae write to 0xffff8881072cfbbc of 1 bytes by task 71 on cpu 0: set_tlb_ubc_flush_pending mm/rmap.c:636 [inline] try_to_unmap_one+0x60e/0x1220 mm/rmap.c:1515 rmap_walk_anon+0x2fb/0x470 mm/rmap.c:2301 try_to_unmap+0xec/0x110 shrink_page_list+0xe91/0x2620 mm/vmscan.c:1719 shrink_inactive_list+0x3fb/0x730 mm/vmscan.c:2394 shrink_list mm/vmscan.c:2621 [inline] shrink_lruvec+0x3c9/0x710 mm/vmscan.c:2940 shrink_node_memcgs+0x23e/0x410 mm/vmscan.c:3129 shrink_node+0x8f6/0x1190 mm/vmscan.c:3252 kswapd_shrink_node mm/vmscan.c:4022 [inline] balance_pgdat+0x702/0xd30 mm/vmscan.c:4213 kswapd+0x200/0x340 mm/vmscan.c:4473 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 71 Comm: kswapd0 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.