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[209.132.180.67]) by mx.google.com with ESMTP id a64si4297422oif.256.2020.03.13.01.54.37; Fri, 13 Mar 2020 01:54:49 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=temperror (no key for signature) header.i=@szeredi.hu header.s=google header.b=PFyhdwTU; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726504AbgCMIxz (ORCPT + 99 others); Fri, 13 Mar 2020 04:53:55 -0400 Received: from mail-il1-f194.google.com ([209.85.166.194]:37498 "EHLO mail-il1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726300AbgCMIxy (ORCPT ); Fri, 13 Mar 2020 04:53:54 -0400 Received: by mail-il1-f194.google.com with SMTP id a6so8155573ilc.4 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=VDBazmlGia5AYlNuV2wNui4f4OVqz02LY4vmrtC8QYAu1R4MZvzJ7uUrnhEvIgyehh zxKYCu6XD4Gf3up729+jT1ekO7iuxvBA5BPz3Mb+Wk8x6dbyOW2LJR2Pr00wmK9hL2jY HdgQeJ/Xey6oCC3hyrkNclY6oDFz8IRgg8o4mgJbpV4BymX4pJuiHiMKtPwLu5cOcTMD AYlfl4O04K4gOerk7kMPs/jTrHvg/UkMFdtFLuY+lm711AGPuAiDk4XOlmwcUNystJFl j0x0wMoTRCyys6Ef9X0UBm59lnVOKBA8+tc9rI494BrH8hbs3wLJNRtlc6x7yPbydE1C R6IA== X-Gm-Message-State: ANhLgQ0LpnYvnn+TrgU+1ppgqqd5u0YqpcRKIAbjZoijJCot7KQ8375M uOCqyxB1Rf1FSVBiJx9UYSOs0pHh8FZBoMdrhXYrSw== 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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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--