From nobody Sun Feb 8 15:58:50 2026 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B7C6D337B80 for ; Wed, 12 Nov 2025 13:09:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762952993; cv=none; b=HXh6FtCX1PMfntBdvpm1swAvNAlVa3dHhufWuiEFlmHAAielqe064nncS3F84FfNXsFltBVzKEvz8Hl2Pq8qhSea1BuP/vx0agm10kQYjR+mvmri6zvOC+bfzk7RemcanhhL6ro1x3ZeLaQVDVvW7RC/Xh+2E9XELNceP7DFVec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762952993; c=relaxed/simple; bh=7blo7W3QrwEHVBL5bm9NzbM26qsL4pvNMrpqzD7XhvA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=AakU/Bq1qljmV9ZGTE+QKXsiNgjSfhvKf5ZUJ24ZNsHwcq55C2sTmw5LUZ92oqGj7EhIXCFI+3D3xMUtSuJpAVjzyVGOX/eSqC4+q6FNOxwQCK5BB+9ME9yB0Wpvu6Xns/vIjGp+rfZy2/qlA7a0zadQJDzRjtzHjq4XcvWpPdc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-4337b5c3388so26830845ab.2 for ; Wed, 12 Nov 2025 05:09:50 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762952990; x=1763557790; h=content-transfer-encoding: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=8JiPnVjMdo3Xe7L4WURoVzBm4/do7K08c/R9hRy2O5U=; b=GUZazRRlXYjkxftwtqRQ17UQbX6B6rjJo2WXpUYUiLLpwztBz6hMZBXe58RsmLppZ+ OQZgwkkmw66+hBWbIwK59nlbZU1Uhdxuwln9137WFePVKsB8cn4yOxe77cBih/RdTTOC +RgAU870eYUKGS82Y8UTTFm9JTwRdyL40d1xGh3iS1GbDwhMfX3m7WUVkWofAuGqz2Ek poXNc89p9oCnzGnteOujE53qyrmQB63Z/Fbru9pQ93P7XD2huhZood36NekemOvDK7tg zj6at5ZvZBBMZvvOOw/YGG/ey+vci8EQ2D79+N3ezcfVOhfGCECA+r67i7XTuHKo+h/8 Iupw== X-Gm-Message-State: AOJu0Yxs0oyMQD8jQ0yl+0YFsD9BWeEs2SG9Xa+HVs4Y40zNonukSmpE lcGx4DuHraDBTFBWo+EXg8YSz+s0H5+9wDUuBX1uM8EjnKNa7s1tUhc5JR91BANDghsxAh3QJVo aK0TSIM1nCrs8w7pmFUy8OFzfdgdcQ/SCoKvZSlAOCwtdcgS0+xnTdIInHyA= X-Google-Smtp-Source: AGHT+IH3YEYSHblbiv3MAe1kvj3pK1Wk5NqPibzwMeOpotHn9poQQ67sCu0BhWQW8tl3cjTemBBxtZY1AnDnyCRT/6ePGyc91Oja Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3e89:b0:433:31b5:572b with SMTP id e9e14a558f8ab-43473dabff2mr35656785ab.22.1762952989863; Wed, 12 Nov 2025 05:09:49 -0800 (PST) Date: Wed, 12 Nov 2025 05:09:49 -0800 In-Reply-To: <68f6a48f.050a0220.91a22.0453.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6914871d.050a0220.3565dc.0000.GAE@google.com> Subject: Forwarded: Re: test KMSAN: uninit-value in cfg80211_classify8021d From: syzbot To: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: test KMSAN: uninit-value in cfg80211_classify8021d Author: vnranganath.20@gmail.com #syz test diff --git a/net/wireless/util.c b/net/wireless/util.c index 23bca5e687c1..c310876c6c72 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -963,13 +963,23 @@ unsigned int cfg80211_classify8021d(struct sk_buff *s= kb, switch (skb->protocol) { case htons(ETH_P_IP): - if (!pskb_may_pull(skb, sizeof(struct iphdr))) + struct iphdr iph, *ip; + + ip =3D skb_header_pointer(skb, sizeof(struct ethhdr), + sizeof(*ip), &iph); + if (!ip) return 0; + dscp =3D ipv4_get_dsfield(ip_hdr(skb)) & 0xfc; break; case htons(ETH_P_IPV6): - if (!pskb_may_pull(skb, sizeof(struct ipv6hdr))) + struct ip6hdr ip6h, *ip6; + + ip6 =3D skb_header_pointer(skb, sizeof(struct ethhdr), + sizeof(*ip6), &ip6h); + if (!ip6) return 0; + dscp =3D ipv6_get_dsfield(ipv6_hdr(skb)) & 0xfc; break; case htons(ETH_P_MPLS_UC): On Wed, Nov 12, 2025 at 12:48=E2=80=AFAM Ranganath V N wrote: > > #syz test