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[2620:137:e000::3:1]) by mx.google.com with ESMTPS id bq4-20020a056a02044400b005c685a2d34esi5322023pgb.321.2023.12.05.23.08.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Dec 2023 23:08:21 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) client-ip=2620:137:e000::3:1; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:1 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by morse.vger.email (Postfix) with ESMTP id C8D6881CB0FB; Tue, 5 Dec 2023 23:08:18 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at morse.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376923AbjLFHIC (ORCPT + 99 others); Wed, 6 Dec 2023 02:08:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50760 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229825AbjLFHIA (ORCPT ); Wed, 6 Dec 2023 02:08:00 -0500 Received: from mail-oa1-f70.google.com (mail-oa1-f70.google.com [209.85.160.70]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D271135 for ; Tue, 5 Dec 2023 23:08:06 -0800 (PST) Received: by mail-oa1-f70.google.com with SMTP id 586e51a60fabf-1fae4875e0eso6518988fac.3 for ; Tue, 05 Dec 2023 23:08:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701846485; x=1702451285; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=+tXRlkucHpkEAT7gc9CxZr0co86T6E2IM6/eBoEInY0=; b=Jx/lkBz8h6HSeHUhPNN3O6VoSg4u/LGdfDxA3HJerZnoH4EXIzjmlTuSyj4qHaqimx BMeyBOS/dUHvW7WXhmFww0lZSCjJNgNK1w2t7yuzzecR2RqR0ZABH13lYIQOljmoQ+NJ rZpVcoqKfQMLWpgeLK8QCAjKi9x6r+fRakKuCkHsz2ZobvKyzYxXeobBsE+Cia8zxOMB I56JpUxDtAzu1f3XhIMbjf+d1/iXm7kKoxC3Kufo8SeL92HXRYlV2Dzw2wexAJRtzsTV ghqll2ILzJnYO1GkjvcyIrnqWONLhk0k49QXXopY4IH0nlA39phRYtI3gsQMdJMiJGqf DjgQ== X-Gm-Message-State: AOJu0YwQ2O9tN75OMlF07eOp+lsmsOtK2A1S7/xw+9z3bLVFrafhgp6n jx1giFgehkeruUivPyiRXNV8p5Zbn9SpV33ClMnoZkmyP6RyF/k= MIME-Version: 1.0 X-Received: by 2002:a05:6870:4191:b0:1fa:e182:4123 with SMTP id y17-20020a056870419100b001fae1824123mr481076oac.7.1701846485537; Tue, 05 Dec 2023 23:08:05 -0800 (PST) Date: Tue, 05 Dec 2023 23:08:05 -0800 In-Reply-To: <0000000000001b9bed060bc75cbc@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003b9a89060bd203e3@google.com> Subject: Re: [syzbot] [net?] KMSAN: uninit-value in __llc_lookup_established From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-0.4 required=5.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on morse.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (morse.vger.email [0.0.0.0]); Tue, 05 Dec 2023 23:08:18 -0800 (PST) For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [net?] KMSAN: uninit-value in __llc_lookup_established Author: eadavis@qq.com please test uninit-value in __llc_lookup_established #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1c41041124bd diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c index 51bccfb00a9c..58e0b8ab41b7 100644 --- a/net/llc/llc_input.c +++ b/net/llc/llc_input.c @@ -126,6 +126,7 @@ static inline int llc_fixup_skb(struct sk_buff *skb) skb->transport_header += llc_len; skb_pull(skb, llc_len); + printk("3sp: %d, %d, %d\n", skb->protocol, htons(ETH_P_802_2), htons(ETH_P_TR_802_2)); if (skb->protocol == htons(ETH_P_802_2)) { __be16 pdulen; s32 data_size; @@ -141,7 +142,8 @@ static inline int llc_fixup_skb(struct sk_buff *skb) return 0; if (unlikely(pskb_trim_rcsum(skb, data_size))) return 0; - } + } else if (skb->protocol != htons(ETH_P_TR_802_2)) + return 0; return 1; }