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=-13.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_2 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 32B84C010A3 for ; Tue, 5 Nov 2019 11:28:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0C6EF21929 for ; Tue, 5 Nov 2019 11:28:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387888AbfKEL17 (ORCPT ); Tue, 5 Nov 2019 06:27:59 -0500 Received: from mx2.suse.de ([195.135.220.15]:35292 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730624AbfKEL16 (ORCPT ); Tue, 5 Nov 2019 06:27:58 -0500 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 AE44FB3D1; Tue, 5 Nov 2019 11:27:56 +0000 (UTC) Message-ID: <1572952316.2921.3.camel@suse.com> Subject: Re: KMSAN: uninit-value in cdc_ncm_set_dgram_size From: Oliver Neukum To: syzbot , davem@davemloft.net, glider@google.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Date: Tue, 05 Nov 2019 12:11:56 +0100 In-Reply-To: <00000000000013c4c1059625a655@google.com> References: <00000000000013c4c1059625a655@google.com> Content-Type: multipart/mixed; boundary="=-tHZcmQBfFGLiVVm2/Dfe" 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 --=-tHZcmQBfFGLiVVm2/Dfe Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Am Mittwoch, den 30.10.2019, 12:22 -0700 schrieb syzbot: > Hello, > > syzbot found the following crash on: > > HEAD commit: 96c6c319 net: kasan: kmsan: support CONFIG_GENERIC_CSUM on.. > git tree: https://github.com/google/kmsan.git master > console output: https://syzkaller.appspot.com/x/log.txt?x=11f103bce00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9e324dfe9c7b0360 > dashboard link: https://syzkaller.appspot.com/bug?extid=0631d878823ce2411636 > compiler: clang version 9.0.0 (/home/glider/llvm/clang > 80fee25776c2fb61e74c1ecb1a523375c2500b69) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10dd9774e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13651a24e00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+0631d878823ce2411636@syzkaller.appspotmail.com #syz test: https://github.com/google/kmsan.git 96c6c319 --=-tHZcmQBfFGLiVVm2/Dfe Content-Disposition: attachment; filename="0001-CDC-NCM-handle-incomplete-transfer-of-MTU.patch" Content-Type: text/x-patch; name="0001-CDC-NCM-handle-incomplete-transfer-of-MTU.patch"; charset="UTF-8" Content-Transfer-Encoding: base64 RnJvbSAwOTBhYzAzMDViYjQ3ZGE5MzM2YzAxODhlMGU1OWU1MGZmMjI0M2MzIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBPbGl2ZXIgTmV1a3VtIDxvbmV1a3VtQHN1c2UuY29tPgpEYXRl OiBUdWUsIDUgTm92IDIwMTkgMTI6MDQ6NDQgKzAxMDAKU3ViamVjdDogW1BBVENIXSBDREMtTkNN OiBoYW5kbGUgaW5jb21wbGV0ZSB0cmFuc2ZlciBvZiBNVFUKCkEgbWFsaWNpb3VzIGRldmljZSBt YXkgZ2l2ZSBoYWxmIGFuIGFuc3dlciB3aGVuIGFza2VkCmZvciBpdHMgTVRVLiBUaGUgZHJpdmVy IHdpbGwgcHJvY2VlZCBhZnRlciB0aGlzIHdpdGgKYSBnYXJiYWdlIE1UVS4gQW55dGhpbmcgYnV0 IGEgY29tcGxldGUgYW5zd2VyIG11c3QgYmUgdHJlYXRlZAphcyBhbiBlcnJvci4KClJlcG9ydGVk LWJ5OiBzeXpib3QrMDYzMWQ4Nzg4MjNjZTI0MTE2MzZAc3l6a2FsbGVyLmFwcHNwb3RtYWlsLmNv bQpTaWduZWQtb2ZmLWJ5OiBPbGl2ZXIgTmV1a3VtIDxvbmV1a3VtQHN1c2UuY29tPgotLS0KIGRy aXZlcnMvbmV0L3VzYi9jZGNfbmNtLmMgfCAyICstCiAxIGZpbGUgY2hhbmdlZCwgMSBpbnNlcnRp b24oKyksIDEgZGVsZXRpb24oLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL25ldC91c2IvY2RjX25j bS5jIGIvZHJpdmVycy9uZXQvdXNiL2NkY19uY20uYwppbmRleCAwMGNhYjNmNDNhNGMuLjkzOTQ4 N2E1ZjRiYyAxMDA2NDQKLS0tIGEvZHJpdmVycy9uZXQvdXNiL2NkY19uY20uYworKysgYi9kcml2 ZXJzL25ldC91c2IvY2RjX25jbS5jCkBAIC01NzksNyArNTc5LDcgQEAgc3RhdGljIHZvaWQgY2Rj X25jbV9zZXRfZGdyYW1fc2l6ZShzdHJ1Y3QgdXNibmV0ICpkZXYsIGludCBuZXdfc2l6ZSkKIAll cnIgPSB1c2JuZXRfcmVhZF9jbWQoZGV2LCBVU0JfQ0RDX0dFVF9NQVhfREFUQUdSQU1fU0laRSwK IAkJCSAgICAgIFVTQl9UWVBFX0NMQVNTIHwgVVNCX0RJUl9JTiB8IFVTQl9SRUNJUF9JTlRFUkZB Q0UsCiAJCQkgICAgICAwLCBpZmFjZV9ubywgJm1heF9kYXRhZ3JhbV9zaXplLCAyKTsKLQlpZiAo ZXJyIDwgMCkgeworCWlmIChlcnIgPCAyKSB7CiAJCWRldl9kYmcoJmRldi0+aW50Zi0+ZGV2LCAi R0VUX01BWF9EQVRBR1JBTV9TSVpFIGZhaWxlZFxuIik7CiAJCWdvdG8gb3V0OwogCX0KLS0gCjIu MTYuNAoK --=-tHZcmQBfFGLiVVm2/Dfe--