From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out203-205-221-202.mail.qq.com (out203-205-221-202.mail.qq.com [203.205.221.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01DD9BE48 for ; Sun, 3 Mar 2024 11:52:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.205.221.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709466774; cv=none; b=JgW+LPgnLy5BHGAWYGM4O8CLz9K2zlpYeosxvFbEr4qk9UHGss6e5wUiXaOLTUN1oCZ7hTJZyw6qorVQRUV46kETpSpJr2lZSVvqvoWch2EzvW4o4xrmGD8mbHJ17xC53C8G2BnzdcuvG6RDa6M1Tin7bE1U1LwKAgJuyG44AKc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709466774; c=relaxed/simple; bh=6O3MEpm0Y4AStwCVFXGmlpgVaNsNpnXJvOK4VyQqWxs=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=Dtnf3E4cGyiGXvBf43JuBLCAGRlgBpDN6a3b5VW4mxDPyqfneyRi7KfDFycoEwYLAvsk4gcHGdODR5e7aj7HASGUiSWIvmUUDczx9LTWbCpc/Vie8wIO05nutvGAQUrKzEzw5EcYSDQ8koUn4ebV4UUAklJHmaDoLp5amo8ZCgc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=lMffPfTP; arc=none smtp.client-ip=203.205.221.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="lMffPfTP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1709466769; bh=DWQfP/VPsnzHv398WDomEW70GNsznKRGKOkuUEm1iuU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lMffPfTPjG01Z4NuPuCC5Hh32cIJHgFtQ+v2gTnUAN8UzLlqXhcYFQOOcA/Ng0vSx 3ArAwcGFah6ms7N977Rea9cyN1qPcBRNFfX7n2fTikdVE3rIC7Ymi1X8iDqeE7DDnx lEhc56LPBZErHHR/R9/VqnI2oS+Jh210AEJtIMHI= Received: from pek-lxu-l1.wrs.com ([111.198.228.140]) by newxmesmtplogicsvrsza10-0.qq.com (NewEsmtp) with SMTP id D3029086; Sun, 03 Mar 2024 19:52:48 +0800 X-QQ-mid: xmsmtpt1709466768tiz3q6kxo Message-ID: X-QQ-XMAILINFO: NDgMZBR9sMmaP+1mcOH883vq/+M6jorP655z+GGLQOKO5QYlfCMVCYi2EKfR69 qP3yp7bhi/HG99nVtJTdN05AuBJ67BWUeatRX28IVFVSpoebdVwbMvi/JrSKVO41ysMML30bHyFf qdTt5J50225hKuVK4bf3HCh5jIZMI6XXt/UoahcuXny+5o/UhaKEQc/6ceBg1TBF7k7kw+q61cTW FdmWyM39qijCR4eKx4GHWteruL0A8kjIccd19R46Yt0NkdTf73u7Lc7/Rej+Ud+PteSyyldp31xS Y1mqWJKLYQh1eDJhboXp0qH0h3ZJZdnZsZ6VEm9jXWF7TijYd4sku3mCLWhc6kQNj3dGdH7EfqCF EKiilRtFWzTQQ3PpvTXxCIV8Bq9pkOC4OVDq/Lw0shEzl5Rm150sIiUg9SKQK2VPNwj8IVZtH/ER 4CoZpuw8MsTKYWsN8mjZmzhIicM801KM8a9+U1lER/bsHEJPW0UzqZr1ZRjLM9icRHIZxbGgz2sV i4243SzvjiEwHdhKmuFrZCAFs8tFD68OI5ni9gHhbHS1unxUkCPK/UuZkH3dAVnUDIrqlXGIsA33 5s955I++w9OOJmQI27DitNruMtiKlrjsaIhnLEoIwAVJ3Opi7WF9Qn0Zal6PaonM/1VMAFHowT9+ COuXEsIAEkGhcQbbJjd4wB2UuJpMW8brB6ONqzEPY75RxIAl5GEfXWA3xw0Xfpb1GsVRXgPoRfS9 3xIFY0CNuuWqRCJTDyrj5Zz6MoNdnkawkDNMM6Ab1Mt9E2WKgWbK9sB1CrUVbAz5GxhLBbWVdRa8 tmlb77AUPgBMEfkqE9/Krq79TGfVDWvMsD70oK1FD3uDUY6GfUFKdSg83QiBtq8+ixjmmKbtd3+m +s2JQXn1wT6aJv+oGZpygSNAenbhdHphGfo+a3YoAVmtecjpg32Sjf4zjRb6oWeryuCeYBQpi/cx pV3pQ6GDM= X-QQ-XMRINFO: OWPUhxQsoeAVDbp3OJHYyFg= From: Edward Adam Davis To: syzbot+f770ce3566e60e5573ac@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [hams?] KMSAN: uninit-value in nr_route_frame Date: Sun, 3 Mar 2024 19:52:48 +0800 X-OQ-MSGID: <20240303115248.552050-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000b69bf20612bf586e@google.com> References: <000000000000b69bf20612bf586e@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test uninit-value in nr_route_frame #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master diff --git a/net/core/skbuff.c b/net/core/skbuff.c index edbbef563d4d..c8662be35000 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -656,6 +656,7 @@ struct sk_buff *__alloc_skb(unsigned int size, gfp_t gfp_mask, * to allow max possible filling before reallocation. */ prefetchw(data + SKB_WITH_OVERHEAD(size)); + memset(data, 0, sizeof(*data)); /* * Only clear those fields we need to clear, not those that we will