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[209.132.180.67]) by mx.google.com with ESMTP id m68si10687513pfm.150.2019.08.19.08.25.30; Mon, 19 Aug 2019 08:25:47 -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; 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 S1726918AbfHSPYk (ORCPT + 99 others); Mon, 19 Aug 2019 11:24:40 -0400 Received: from mx2.suse.de ([195.135.220.15]:35524 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726211AbfHSPYj (ORCPT ); Mon, 19 Aug 2019 11:24:39 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 79C7BAD43; Mon, 19 Aug 2019 15:24:38 +0000 (UTC) Message-ID: <1566228274.5663.29.camel@suse.com> Subject: Re: KASAN: use-after-free Read in iowarrior_disconnect From: Oliver Neukum To: syzbot , keescook@chromium.org, gustavo@embeddedor.com, andreyknvl@google.com, syzkaller-bugs@googlegroups.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Date: Mon, 19 Aug 2019 17:24:34 +0200 In-Reply-To: <00000000000090564a0590796d2f@google.com> References: <00000000000090564a0590796d2f@google.com> Content-Type: multipart/mixed; boundary="=-uR6+AWK0TsMm13oftsMA" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-uR6+AWK0TsMm13oftsMA Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Am Montag, den 19.08.2019, 07:48 -0700 schrieb syzbot: > Hello, > > syzbot found the following crash on: > > HEAD commit: d0847550 usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=139be302600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=dbc9c80cc095da19 > dashboard link: https://syzkaller.appspot.com/bug?extid=cfe6d93e0abab9a0de05 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12fe6b02600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1548189c600000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+cfe6d93e0abab9a0de05@syzkaller.appspotmail.com > #syz test: https://github.com/google/kasan.git d0847550 --=-uR6+AWK0TsMm13oftsMA Content-Disposition: attachment; filename="0001-Revert-usb-iowarrior-fix-deadlock-on-disconnect.patch" Content-Transfer-Encoding: base64 Content-Type: text/x-patch; name="0001-Revert-usb-iowarrior-fix-deadlock-on-disconnect.patch"; charset="UTF-8" RnJvbSA0M2M0MjcwYTQyNDA1MmRjYjE2OGEwZmVhNWE5YWQ4OTc3OGVhZGM3IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBPbGl2ZXIgTmV1a3VtIDxvbmV1a3VtQHN1c2UuY29tPgpEYXRl OiBNb24sIDE5IEF1ZyAyMDE5IDE3OjIyOjUzICswMjAwClN1YmplY3Q6IFtQQVRDSF0gUmV2ZXJ0 ICJ1c2I6IGlvd2FycmlvcjogZml4IGRlYWRsb2NrIG9uIGRpc2Nvbm5lY3QiCgpUaGlzIHJldmVy dHMgY29tbWl0IGFhNDBjZmI0ZDJmMTM0MzIyYTc4MmIxOGE2ODdkMDQzMDBmNTBmNjAuCi0tLQog ZHJpdmVycy91c2IvbWlzYy9pb3dhcnJpb3IuYyB8IDcgKysrLS0tLQogMSBmaWxlIGNoYW5nZWQs IDMgaW5zZXJ0aW9ucygrKSwgNCBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL3Vz Yi9taXNjL2lvd2Fycmlvci5jIGIvZHJpdmVycy91c2IvbWlzYy9pb3dhcnJpb3IuYwppbmRleCBm NWJlZDlmMjllNTYuLmJhMDVkZDgwYTAyMCAxMDA2NDQKLS0tIGEvZHJpdmVycy91c2IvbWlzYy9p b3dhcnJpb3IuYworKysgYi9kcml2ZXJzL3VzYi9taXNjL2lvd2Fycmlvci5jCkBAIC04NjYsMjAg Kzg2NiwxOSBAQCBzdGF0aWMgdm9pZCBpb3dhcnJpb3JfZGlzY29ubmVjdChzdHJ1Y3QgdXNiX2lu dGVyZmFjZSAqaW50ZXJmYWNlKQogCWRldiA9IHVzYl9nZXRfaW50ZmRhdGEoaW50ZXJmYWNlKTsK IAltdXRleF9sb2NrKCZpb3dhcnJpb3Jfb3Blbl9kaXNjX2xvY2spOwogCXVzYl9zZXRfaW50ZmRh dGEoaW50ZXJmYWNlLCBOVUxMKTsKLQkvKiBwcmV2ZW50IGRldmljZSByZWFkLCB3cml0ZSBhbmQg aW9jdGwgKi8KLQlkZXYtPnByZXNlbnQgPSAwOwogCiAJbWlub3IgPSBkZXYtPm1pbm9yOwotCW11 dGV4X3VubG9jaygmaW93YXJyaW9yX29wZW5fZGlzY19sb2NrKTsKLQkvKiBnaXZlIGJhY2sgb3Vy IG1pbm9yIC0gdGhpcyB3aWxsIGNhbGwgY2xvc2UoKSBsb2NrcyBuZWVkIHRvIGJlIGRyb3BwZWQg YXQgdGhpcyBwb2ludCovCiAKKwkvKiBnaXZlIGJhY2sgb3VyIG1pbm9yICovCiAJdXNiX2RlcmVn aXN0ZXJfZGV2KGludGVyZmFjZSwgJmlvd2Fycmlvcl9jbGFzcyk7CiAKIAltdXRleF9sb2NrKCZk ZXYtPm11dGV4KTsKIAogCS8qIHByZXZlbnQgZGV2aWNlIHJlYWQsIHdyaXRlIGFuZCBpb2N0bCAq LworCWRldi0+cHJlc2VudCA9IDA7CiAKIAltdXRleF91bmxvY2soJmRldi0+bXV0ZXgpOworCW11 dGV4X3VubG9jaygmaW93YXJyaW9yX29wZW5fZGlzY19sb2NrKTsKIAogCWlmIChkZXYtPm9wZW5l ZCkgewogCQkvKiBUaGVyZSBpcyBhIHByb2Nlc3MgdGhhdCBob2xkcyBhIGZpbGVkZXNjcmlwdG9y IHRvIHRoZSBkZXZpY2UgLAotLSAKMi4xNi40Cgo= --=-uR6+AWK0TsMm13oftsMA--