From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) (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 802698830 for ; Sat, 20 Jul 2024 08:30:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721464244; cv=none; b=BvpUu0Bo0T4AkNL2dIi3qv15ENFOMGpC9A9j0nLavCLCH+Aud4EPPpG/V1Eca+aFxo9Sa29IYM2llKa2JJdc0177eF0oM6gDdfCV9tltPfDCqiyhejqqvTIf9K8JGMmdyzT3Xj3c3S/vHmhB+0x0PlXqjmfQTv8R2Qty5d8DqnU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721464244; c=relaxed/simple; bh=rYSMhlcYUfuUJmk7W0A2GRupXQQQxzarnjBcJ2gBuJs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=fJIrI9ivTUEbukBgl1TLy48nSn0MX5QvqoXDjWzM2zZrkdLRCS0SVnKSOKtycTE+GmsHo3WbKh3phRGHKBGum3nfjiful5KWQeavYtDqcD3mQS+c/lpqG8RM2pEkaprQfbU/KLjIpLrquiMCKB71emZAqpdadHd0lwbZOLw99cU= 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=209.85.166.71 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-io1-f71.google.com with SMTP id ca18e2360f4ac-7f682fb3b16so442870539f.1 for ; Sat, 20 Jul 2024 01:30:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721464242; x=1722069042; 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=N/8XzY4rPxD3nry/QyJLQA7kZA0p4z0MbynfkV9ZB1I=; b=LpGoBYMfjrFg4bxxgJc5JXnwsj9KiCkC1UZhFyldnD4r8HwzwPaPvWA546MRO5aRqO U/3xme15ZjcoZ4AV6Ssh5zOSyMOmzUEZkRZfTf3ck6hMCdQbDNiwWOdb49fgDNmEBkzM hm8996EwBEGk0Z/JWSyoEmzEZPbHsOs6XVrurQ18FfQrIizX2SKyW5H+PsHbmjl3KAvz b0M6ea8G7MUHXOi338fNlo3bfd7MtgySw5QDjuP3JCGfDofpB8bZUNnHPiOUP+Yh8Kz3 5sPAjQ+j8XTMt5lcywn2wvvuplQefLofzDNe9G+49Vu2o9v3SBJ84KZ9sWucfFSPT3TM h+xw== X-Gm-Message-State: AOJu0Yy31ibF1+2PsrDx57s6QkruiQuKi+9v+Tt+Sp6gMAiRyL49c0Ca +CkkotMO3hi2GckQ3NI0IH81HtC0tc+jFuYscWqt79+hDaXpAqLX8b8BywvLR8x2sMuWJjZDgJ+ 5c1ACVVFVNAFKjbjBdCRqaVXn32LzsiFqGwww5xF5u0TAxEM58jamWqc= X-Google-Smtp-Source: AGHT+IFf0VD/zQW37S2mTPNPUWsT+NA4vqq2N2Q++KYyXyfjoP0usWqfLL0khkBLt/lYTetDnjbJ+fQ8m9bzDUMrpIY4FMVgdy7V Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:22c2:b0:4c0:9a3e:c263 with SMTP id 8926c6da1cb9f-4c23fae6db7mr132849173.0.1721464242742; Sat, 20 Jul 2024 01:30:42 -0700 (PDT) Date: Sat, 20 Jul 2024 01:30:42 -0700 In-Reply-To: <0000000000004a86bf0616571fc7@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000aeb998061da9a010@google.com> Subject: Re: [syzbot] Re: [syzbot] [net?] KMSAN: uninit-value in hsr_get_node (3) From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Re: [syzbot] [net?] KMSAN: uninit-value in hsr_get_node (3) Author: aha310510@gmail.com #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- net/hsr/hsr_framereg.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 73bc6f659812..1c492146594c 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -224,6 +224,9 @@ struct hsr_node *hsr_get_node(struct hsr_port *port, struct list_head *node_db, if (!skb_mac_header_was_set(skb)) return NULL; + if (skb->mac_len < sizeof(struct ethhdr)) + return NULL; + ethhdr = (struct ethhdr *)skb_mac_header(skb); list_for_each_entry_rcu(node, node_db, mac_list) { --