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=-3.7 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 803E2C433ED for ; Fri, 30 Apr 2021 20:58:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5AB2C6145B for ; Fri, 30 Apr 2021 20:58:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236112AbhD3U7H (ORCPT ); Fri, 30 Apr 2021 16:59:07 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:45758 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236063AbhD3U7F (ORCPT ); Fri, 30 Apr 2021 16:59:05 -0400 Received: by mail-il1-f197.google.com with SMTP id i27-20020a056e021d1bb02901699edaa0aaso37997587ila.12 for ; Fri, 30 Apr 2021 13:58:16 -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:message-id:subject:from:to; bh=6h1ZxgO6iKfJhFGptmgds8TlS+dggD6dzoUv/YrF7Ew=; b=ug3RkdUf1Ed/urXrAvVrOy3JgZKAKnfaJydHrUvso8j8KVMEvpYDNDujN/K8kBIyoF Mj0//nlelXGYgI3j923GebFYzSnIt2xypuDe0YFcvLkBLY6WW07qUikwDW9s8BJ1GEwB fzYEy+08tBdXlmcwp69BDhJ8F0FuPv32hBtMf1WzrvfEfE46if6oQbc/4VZkl0Aqjd8F z/J2pIJv9xDW8nqb70OJy0mZm8X8p8zJK7jyqQSeslf/+rJuKbsX57SCaEHXBz3JIyrY Y1+OOGQUwMjIR1nzqJSUPJrHZMC5/vbRuBV8pZaMHtoMRX5rE4Zecux1EUbwJr57THyD hNIg== X-Gm-Message-State: AOAM533dc/tAmL/cI6OCpITQqlDxdYHR1y4xB1Lh4U2Fqu1+SSfqDa+K 77nWdVdE8lyxvKhVV7WBKxH6VOZ4/l9fK+KWBg0T8yTgJfeo X-Google-Smtp-Source: ABdhPJyLPfj71xJBaPCuJcqtA7dvsH2UfjIVzlbqy5cTGhaxzrgGRRe+1jJiFcmglpHT4mv7ODMm87NJPCV6guLJEhmBYIT7Aeem MIME-Version: 1.0 X-Received: by 2002:a6b:7014:: with SMTP id l20mr5280652ioc.96.1619816295827; Fri, 30 Apr 2021 13:58:15 -0700 (PDT) Date: Fri, 30 Apr 2021 13:58:15 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ea0f5405c136ded4@google.com> Subject: [syzbot] WARNING in do_epoll_ctl From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 57e22247 net: wwan: core: Return poll error in case of por.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=105f2ee5d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=7668018815a66138 dashboard link: https://syzkaller.appspot.com/bug?extid=25880e2b56e3a1f8fbc8 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+25880e2b56e3a1f8fbc8@syzkaller.appspotmail.com ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(__owner_task(owner) != current) WARNING: CPU: 1 PID: 8398 at kernel/locking/mutex.c:1235 __mutex_unlock_slowpath+0x457/0x610 kernel/locking/mutex.c:1235 Modules linked in: CPU: 0 PID: 8398 Comm: systemd-udevd Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__mutex_unlock_slowpath+0x457/0x610 kernel/locking/mutex.c:1235 Code: 00 00 44 8b 05 0a f8 da 06 45 85 c0 0f 84 e8 fc ff ff e9 ed fc ff ff 48 c7 c6 20 88 6b 89 48 c7 c7 60 88 6b 89 e8 12 59 bd ff <0f> 0b eb c2 e8 e0 5c fe ff 85 c0 0f 84 04 fe ff ff 48 c7 c0 88 46 RSP: 0018:ffffc9000166fc98 EFLAGS: 00010286 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: ffff888020711c40 RSI: ffffffff815c5205 RDI: fffff520002cdf85 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815bdf9e R11: 0000000000000000 R12: fffffbfff1fcc2ec R13: ffff888020711c40 R14: 00000c30ffffea00 R15: ffff888012ca0000 FS: 00007f06b1f238c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9bd4c0041c CR3: 0000000017532000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_epoll_ctl+0x6c3/0x2d30 fs/eventpoll.c:2147 __do_sys_epoll_ctl fs/eventpoll.c:2178 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2169 [inline] __x64_sys_epoll_ctl+0x13f/0x1c0 fs/eventpoll.c:2169 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f06b0da32aa Code: 48 8b 0d f1 fb 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 e9 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d be fb 2a 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcbd811ce8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 00005645e4b0ad90 RCX: 00007f06b0da32aa RDX: 0000000000000011 RSI: 0000000000000001 RDI: 0000000000000010 RBP: 00007ffcbd813800 R08: 00007f06b1f238c0 R09: 0000000000000000 R10: 00007ffcbd811d70 R11: 0000000000000206 R12: 00007ffcbd811d70 R13: 000000000aba9500 R14: 000000000000000b R15: 00007ffcbd813800 --- 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.