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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 9591BC2BABC for ; Tue, 7 Apr 2020 09:31:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6AAC12074F for ; Tue, 7 Apr 2020 09:31:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728073AbgDGJbE (ORCPT ); Tue, 7 Apr 2020 05:31:04 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:55738 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726657AbgDGJbD (ORCPT ); Tue, 7 Apr 2020 05:31:03 -0400 Received: by mail-io1-f70.google.com with SMTP id k5so2477128ioa.22 for ; Tue, 07 Apr 2020 02:31:03 -0700 (PDT) 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:in-reply-to:message-id:subject :from:to; bh=9ecQ8raBwV+ql8FB6mKArZB1484qcIdZc1keMaK2jMc=; b=EiAMXkZ4A8vvGb5rKm/V6kVlYdBooBwjQ65DA3oCnyQ/h1s49Uszp4XMSFA9DGpA8+ pzKXD8wwZkr1WRSzrHsP7HXz59tEwRUYZzfUvCsblgfqJeBDfrMLsULDKbIa/giS/15G ppbtEuxAIRK9GqeJwSRPkWZh2y59iOlmz+4spOEDVkc97rAE/7ptA2EVJ5JJin6cdk5V RneXQRWefbxuRhcopXkAUPN8NSSu3vfB5olhMVD5ZPDiyti+IJN+bZVh2JV16UO+zrqS 56mEloJ1DFmIQMwva4UGLfEU7hA1QFk18AMm2xks29664FJdWE51PpSElOHB4hFk772T s8+g== X-Gm-Message-State: AGi0PuaLyEX7MPVYwITmsvNc+KgUNgKkpgJipkJjlxUN946QiMbOj8IC LwX//QYWiTniYC4Ycc/LaRu0tuefuLXHZCdib3MOoye4w94Y X-Google-Smtp-Source: APiQypIVR59kn7drjOvrJ37LHlH0A1TQqNo5AIe8adfVvVA7j+43yXTNPKQq6cEndGOflU7+5OFZ9Q/tarO/p/azAPJ9AMzyiuAb MIME-Version: 1.0 X-Received: by 2002:a92:498e:: with SMTP id k14mr1290576ilg.160.1586251862658; Tue, 07 Apr 2020 02:31:02 -0700 (PDT) Date: Tue, 07 Apr 2020 02:31:02 -0700 In-Reply-To: <000000000000f59ac305a25cfa14@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cc522f05a2b00ad5@google.com> Subject: Re: possible deadlock in io_submit_one (3) From: syzbot To: adobriyan@gmail.com, akpm@linux-foundation.org, allison@lohutok.net, areber@redhat.com, aubrey.li@linux.intel.com, avagin@gmail.com, bcrl@kvack.org, christian@brauner.io, cyphar@cyphar.com, ebiederm@xmission.com, gregkh@linuxfoundation.org, guro@fb.com, joel@joelfernandes.org, keescook@chromium.org, linmiaohe@huawei.com, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, mhocko@suse.com, mingo@kernel.org, oleg@redhat.com, peterz@infradead.org, sargun@sargun.me, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org syzbot has bisected this bug to: commit 7bc3e6e55acf065500a24621f3b313e7e5998acf Author: Eric W. Biederman Date: Thu Feb 20 00:22:26 2020 +0000 proc: Use a list of inodes to flush from proc bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12b3c9c7e00000 start commit: 7e634208 Merge tag 'acpi-5.7-rc1-2' of git://git.kernel.or.. git tree: upstream final crash: https://syzkaller.appspot.com/x/report.txt?x=11b3c9c7e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=16b3c9c7e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=12205d036cec317f dashboard link: https://syzkaller.appspot.com/bug?extid=343f75cdeea091340956 userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=105d592be00000 Reported-by: syzbot+343f75cdeea091340956@syzkaller.appspotmail.com Fixes: 7bc3e6e55acf ("proc: Use a list of inodes to flush from proc") For information about bisection process see: https://goo.gl/tpsmEJ#bisection