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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 5D75EC46EF7 for ; Thu, 12 Jul 2018 15:49:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1BB5120878 for ; Thu, 12 Jul 2018 15:49:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1BB5120878 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727159AbeGLP7K (ORCPT ); Thu, 12 Jul 2018 11:59:10 -0400 Received: from mail-it0-f69.google.com ([209.85.214.69]:60366 "EHLO mail-it0-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726800AbeGLP7K (ORCPT ); Thu, 12 Jul 2018 11:59:10 -0400 Received: by mail-it0-f69.google.com with SMTP id o186-v6so4894845ita.9 for ; Thu, 12 Jul 2018 08:49:03 -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:message-id:subject:from:to; bh=Qe/cckM18hiuvvZCNNqtKoIGt5g/cnkP8bpzBdOHzNU=; b=uTm1tgN3gfeFiClhUVAdoxyYjERn81vag7wWALbjhlZb4404AauGSE0goxgaHJ8a0X 9A+F4ihgvVFp49E7XuRpMa4TC/qJOBkyYAM4KnlQfR6jKXe2pb34Q0IDi7uLM+fI0hCq bueSVfhPrt167JbgPp15RhwIRRlpiRX3mlZ37hHOCxlOWLeAbdmrdmjTTHYiXumGtHzq MP7m1Az+18I/UPQAoXJn+1okSjESJrQSg1jHhUKRlQk5bYqb7mgFpjlBmCFpLcPrXEAW thPhihArpySt0uLMUFygjfQLqU3FQVLDfsVpiXj0WrXVcbL2Gi2kukK4QfQBS9GXADfh sHvw== X-Gm-Message-State: AOUpUlGHF1rdNY1TxnDyAz9uubc0LnWsKobdzllqgm1CcqCXz9bAxD7I obFJ1HHh/cwYJqTwUGXWawhawBIbDZoRo0iQZIXfmCTu6owZ X-Google-Smtp-Source: AAOMgpfPkr8rAijnv1u23MVUMqQSciXjhhij6xyZbYHvt34WZ8y9aGx+tAaoDhKbRVfz2Ox1XSFOHSDpUxbMln88p+UxsvPEPKuD MIME-Version: 1.0 X-Received: by 2002:a02:4c16:: with SMTP id a22-v6mr1166204jab.9.1531410542888; Thu, 12 Jul 2018 08:49:02 -0700 (PDT) Date: Thu, 12 Jul 2018 08:49:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006a10de0570cf4d66@google.com> Subject: WARNING: lock held when returning to user space in fuse_lock_inode From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: c25c74b7476e Merge tag 'trace-v4.18-rc3-2' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=177bcec2400000 kernel config: https://syzkaller.appspot.com/x/.config?x=25856fac4e580aa7 dashboard link: https://syzkaller.appspot.com/bug?extid=3f7b29af1baa9d0a55be compiler: gcc (GCC) 8.0.1 20180413 (experimental) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=13aa7678400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17492678400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3f7b29af1baa9d0a55be@syzkaller.appspotmail.com random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) random: sshd: uninitialized urandom read (32 bytes read) ================================================ WARNING: lock held when returning to user space! 4.18.0-rc4+ #143 Not tainted ------------------------------------------------ syz-executor012/4539 is leaving the kernel with locks still held! 1 lock held by syz-executor012/4539: #0: (____ptrval____) (&fi->mutex){+.+.}, at: fuse_lock_inode+0xaf/0xe0 fs/fuse/inode.c:363 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches