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=-5.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 87755C10DCE for ; Fri, 13 Mar 2020 08:53:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15787206FA for ; Fri, 13 Mar 2020 08:53:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=szeredi.hu header.i=@szeredi.hu header.b="PFyhdwTU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726520AbgCMIxz (ORCPT ); Fri, 13 Mar 2020 04:53:55 -0400 Received: from mail-il1-f196.google.com ([209.85.166.196]:42254 "EHLO mail-il1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726216AbgCMIxz (ORCPT ); Fri, 13 Mar 2020 04:53:55 -0400 Received: by mail-il1-f196.google.com with SMTP id p2so336088ile.9 for ; Fri, 13 Mar 2020 01:53:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=szeredi.hu; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=hEtT8H9r/rZLXOf4yHOAUmsYOn8BGa21+Hy5KXhtNdw=; b=PFyhdwTU+O0Wft/p8BQfeIuCDyGs4EhCjo5AmXwVY8iAr8qQ1wjv6RUfqwGThCr/F0 5+YJ/c1G1pjfpOn7QevIMOtlddv63++z0xjOSwrcv9Hffr6Js61V8964pjTNHKVoYKap TtqzEuakjRoGheFEBeGgNJ9pRbU+fmeLteaYM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=hEtT8H9r/rZLXOf4yHOAUmsYOn8BGa21+Hy5KXhtNdw=; b=soMueBU+yk0RdQoiToYz4txTkRLYhcwTOumDLVIGMrVJy0ANIbdSMbUzonLV0k30+p 0v8bbaCW1PHubhhRrb3CAynUZpg+uMLC3MaPxi4x4AJs0KZInUa5LK+megVhS25n/iFW ONYGGU6HtCj5i9OufjBYhozcV0K6Bkfi057rfPU7JJZb2ufDA3H4/ltjwarXCLwXlMKr /YWdMoWNypQc22rrTRHLiWaqIuvyZIxr7+hrQnCg31bkFlBzDsasJxI8pMbt1pKJKe4X bCzl7fQogaXVOdIE66UL0t2cAcfvlIoJOndb3nSMPVsCO9G0RFUguZWFFmkgWPeo+IyL dEoA== X-Gm-Message-State: ANhLgQ35jGI2gbnKmxl4jAO3ihVo6QKX/yfjm1NFY0u9Mg1SOUDseMKz E5xOr1ORqaWgN8148/160LMGkohIMwar27a2dXj1uw== X-Google-Smtp-Source: ADFU+vtCORTQtZ0GaACujZv6kK12KQwym47yb46Vt5xMaRvWPsHFtqOM5hfGvnjrnf0HMO7x56B7t5WqAzQUoGeJEXs= X-Received: by 2002:a92:2452:: with SMTP id k79mr231597ilk.174.1584089633904; Fri, 13 Mar 2020 01:53:53 -0700 (PDT) MIME-Version: 1.0 References: <000000000000cc1faf059fcfdc73@google.com> In-Reply-To: <000000000000cc1faf059fcfdc73@google.com> From: Miklos Szeredi Date: Fri, 13 Mar 2020 09:53:42 +0100 Message-ID: Subject: Re: WARNING: lock held when returning to user space in ovl_write_iter To: syzbot Cc: Jiufei Xue , linux-kernel@vger.kernel.org, overlayfs , Miklos Szeredi , syzkaller-bugs Content-Type: multipart/mixed; boundary="000000000000ec8bcf05a0b89bc7" Sender: linux-unionfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-unionfs@vger.kernel.org --000000000000ec8bcf05a0b89bc7 Content-Type: text/plain; charset="UTF-8" #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 63623fd4 --000000000000ec8bcf05a0b89bc7 Content-Type: text/x-patch; charset="US-ASCII"; name="ovl-fix-lockdep-warning-for-async-write.patch" Content-Disposition: attachment; filename="ovl-fix-lockdep-warning-for-async-write.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_k7py202s0 LS0tCiBmcy9vdmVybGF5ZnMvZmlsZS5jIHwgICAgNiArKysrKysKIDEgZmlsZSBjaGFuZ2VkLCA2 IGluc2VydGlvbnMoKykKCi0tLSBhL2ZzL292ZXJsYXlmcy9maWxlLmMKKysrIGIvZnMvb3Zlcmxh eWZzL2ZpbGUuYwpAQCAtMjQ0LDYgKzI0NCw5IEBAIHN0YXRpYyB2b2lkIG92bF9haW9fY2xlYW51 cF9oYW5kbGVyKHN0cnUKIAlpZiAoaW9jYi0+a2lfZmxhZ3MgJiBJT0NCX1dSSVRFKSB7CiAJCXN0 cnVjdCBpbm9kZSAqaW5vZGUgPSBmaWxlX2lub2RlKG9yaWdfaW9jYi0+a2lfZmlscCk7CiAKKwkJ LyogQWN0dWFsbHkgYWNxdWlyZWQgaW4gb3ZsX3dyaXRlX2l0ZXIoKSAqLworCQlfX3NiX3dyaXRl cnNfYWNxdWlyZWQoZmlsZV9pbm9kZShpb2NiLT5raV9maWxwKS0+aV9zYiwKKwkJCQkgICAgICBT Ql9GUkVFWkVfV1JJVEUpOwogCQlmaWxlX2VuZF93cml0ZShpb2NiLT5raV9maWxwKTsKIAkJb3Zs X2NvcHlhdHRyKG92bF9pbm9kZV9yZWFsKGlub2RlKSwgaW5vZGUpOwogCX0KQEAgLTM0Niw2ICsz NDksOSBAQCBzdGF0aWMgc3NpemVfdCBvdmxfd3JpdGVfaXRlcihzdHJ1Y3Qga2lvCiAJCQlnb3Rv IG91dDsKIAogCQlmaWxlX3N0YXJ0X3dyaXRlKHJlYWwuZmlsZSk7CisJCS8qIFBhY2lmeSBsb2Nr ZGVwLCBzYW1lIHRyaWNrIGFzIGRvbmUgaW4gYWlvX3dyaXRlKCkgKi8KKwkJX19zYl93cml0ZXJz X3JlbGVhc2UoZmlsZV9pbm9kZShyZWFsLmZpbGUpLT5pX3NiLAorCQkJCSAgICAgU0JfRlJFRVpF X1dSSVRFKTsKIAkJYWlvX3JlcS0+ZmQgPSByZWFsOwogCQlyZWFsLmZsYWdzID0gMDsKIAkJYWlv X3JlcS0+b3JpZ19pb2NiID0gaW9jYjsK --000000000000ec8bcf05a0b89bc7--