From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: * X-Spam-Status: No, score=1.3 required=5.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_SOFTFAIL,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 37CC7C43334 for ; Sun, 12 Jun 2022 15:39:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237653AbiFLPj1 (ORCPT ); Sun, 12 Jun 2022 11:39:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235371AbiFLPj0 (ORCPT ); Sun, 12 Jun 2022 11:39:26 -0400 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9FBA92F67B for ; Sun, 12 Jun 2022 08:39:25 -0700 (PDT) Received: by mail-il1-f197.google.com with SMTP id x3-20020a056e021bc300b002d1b0ccfca6so3023375ilv.11 for ; Sun, 12 Jun 2022 08:39:25 -0700 (PDT) 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=OsuKjvr8Rex0GUK7+NNppKCk58Zc6Dq+s+Iy7Kru1zE=; b=U2difLPYEi31C3E57gG25gZVgLkd7kOO37Ws4FdgWLSDeiaLQPt0XS0DR7qAwh5m3T 5slwyyzRwpT/jlizHjPqwYhOJaG9NcXZw1b5jNSqMHW66kEEfxFmJAz61gLDoxr+JT96 xLLM7DgOWvvrPtsH9UOHRRcqCPyM3RBnRFqU8lU095apupklY27U7sklTris+hyb9ONh YKh9j/Y0KydVqaXFRUqFK6VfL8ktf8oKgTA3mFBPSW1VdMxkYzFnhkGcjj1m/HiAM5F8 9YrljVVZzpmWL4ikN0dj4aDf1goI2QgyA4FZEyLD8Z/yf/nx+MHWG5zs9lrD42ZGEwom y4KA== X-Gm-Message-State: AOAM531jVeC9Ov2bmt/K7co/xes3lsiezyyDQDkGQM3YgIG+crrD4kpL OFl6Y7oXm7stUUWa+XdgihPcBMQLpECLmgoyfb6OLc+Vsjzs X-Google-Smtp-Source: ABdhPJwiN5A7P3a4vgEJOLBCF/vP9XNMWlAFJiCy3YknqPlzQtEeaUdeDMOWE2BDHxCzxwFrRxhGmz0nSji//UGGn9KB0eAqCw6Y MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c06:b0:2d1:b240:736f with SMTP id l6-20020a056e021c0600b002d1b240736fmr31088256ilh.133.1655048365077; Sun, 12 Jun 2022 08:39:25 -0700 (PDT) Date: Sun, 12 Jun 2022 08:39:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e2fc3f05e141f930@google.com> Subject: [syzbot] WARNING in exit_tasks_rcu_finish From: syzbot To: brauner@kernel.org, ebiederm@xmission.com, keescook@chromium.org, 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: 6d0c80680317 Add linux-next specific files for 20220610 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13b52c2ff00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a30d6e3e814e5931 dashboard link: https://syzkaller.appspot.com/bug?extid=9bb26e7c5e8e4fa7e641 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, 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+9bb26e7c5e8e4fa7e641@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 1 PID: 28639 at kernel/rcu/tasks.h:1664 exit_tasks_rcu_finish_trace kernel/rcu/tasks.h:1664 [inline] WARNING: CPU: 1 PID: 28639 at kernel/rcu/tasks.h:1664 exit_tasks_rcu_finish+0x122/0x1b0 kernel/rcu/tasks.h:1006 Modules linked in: CPU: 1 PID: 28639 Comm: syz-executor.3 Not tainted 5.19.0-rc1-next-20220610-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:exit_tasks_rcu_finish_trace kernel/rcu/tasks.h:1664 [inline] RIP: 0010:exit_tasks_rcu_finish+0x122/0x1b0 kernel/rcu/tasks.h:1006 Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 62 0f b6 85 89 04 00 00 83 e0 01 08 d8 74 0e <0f> 0b 5b 48 89 ef 5d 41 5c e9 00 d2 ff ff 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc9000a497b58 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000201 RCX: 1ffff11004213b89 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88802109dc49 RBP: ffff88802109d7c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff88802109dc40 R13: dffffc0000000000 R14: ffff88802109d7c0 R15: ffff88802109ddd0 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f771379d090 CR3: 0000000051fd2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_exit+0x18f2/0x2a00 kernel/exit.c:844 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 get_signal+0x2542/0x2600 kernel/signal.c:2857 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f7713689109 Code: Unable to access opcode bytes at RIP 0x7f77136890df. RSP: 002b:00007f77125fe218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f771379bf68 RCX: 00007f7713689109 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f771379bf6c RBP: 00007f771379bf60 R08: 00007fff2278d080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f771379bf6c R13: 00007fff22724c8f R14: 00007f77125fe300 R15: 0000000000022000 --- 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.