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[2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id m19-20020a056402511300b0056b9701a913si6614370edd.456.2024.04.02.20.59.34 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Apr 2024 20:59:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-129023-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=DYocQscY; arc=pass (i=1 spf=pass spfdomain=linux.dev dkim=pass dkdomain=linux.dev dmarc=pass fromdomain=linux.dev); spf=pass (google.com: domain of linux-kernel+bounces-129023-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-kernel+bounces-129023-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id 6E3691F24093 for ; Wed, 3 Apr 2024 03:59:34 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D5C4B3FE2E; Wed, 3 Apr 2024 03:59:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="DYocQscY" Received: from out-174.mta0.migadu.com (out-174.mta0.migadu.com [91.218.175.174]) (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 4ED743FBA0 for ; Wed, 3 Apr 2024 03:59:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712116764; cv=none; b=BNJYnjzB6H0oyGjWn+8A5NfEoUp9kSI1ILq+5bkZgTTxkmLnOyFtGurF9zvLNgW4kc2RuDin0x5eRl9FUp9nR5snEplhT0l6hUxLg8apL4+IlJR6SczJhoumF68SqkDumeILIWz/wfRrtXJTN6IXR//RrbTPbtaPHre13pRzUNY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712116764; c=relaxed/simple; bh=F4+Sg28rLD4dddq8PCOLJyguSpotNbjvEH897YBL8uM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=DlDy9YPGD5qtEP/+3PUbkpYGGa6kLvAGijilxrxm90Ig6zCGdup3284YBhUSTWbMlYA+kM9jp4fAQouh3ALiAeGswoRZJJRpHa3KM9XLVLmetUl2nMXkIWYNnYnemwYE/7RJigBl2tQ9IkpBRb0PNHOCdd4c9rc6PdoMgGyAzYE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=DYocQscY; arc=none smtp.client-ip=91.218.175.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Message-ID: <02d29315-13ee-45c1-984e-13c98e88247b@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1712116761; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=F4+Sg28rLD4dddq8PCOLJyguSpotNbjvEH897YBL8uM=; b=DYocQscYzrpszaBpRxEF4Fi4EaJPuxRGhiEoTyxA5roakT4BEyoSWtzKg9B88SPrG5PWXI ralqMy4jiGZmunp6uYqAG5gOuVDwErS0J+c8YsloGXZqvp5ypwLpwdVHTSVidM7w/D1KIw BZYrbskEWSDibawJ7bWs+YvgQ2kgzhs= Date: Tue, 2 Apr 2024 20:59:10 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [syzbot] [bpf?] KMSAN: uninit-value in trie_delete_elem Content-Language: en-GB To: Aleksandr Nogikh , Alexander Potapenko Cc: syzbot , andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com References: <000000000000f9ce6d061494e694@google.com> <2ee098ec-a46f-44fa-8719-049331c4c206@linux.dev> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Yonghong Song In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT On 4/1/24 11:36 PM, Aleksandr Nogikh wrote: > Hi, > > On Mon, Apr 1, 2024 at 8:55 PM Yonghong Song wrote: >> >> On 3/26/24 12:00 PM, syzbot wrote: >>> Hello, >>> >>> syzbot found the following issue on: >>> >>> ===================================================== >>> BUG: KMSAN: uninit-value in trie_delete_elem+0xc0/0xbe0 kernel/bpf/lpm_trie.c:448 >> Unrelated to the bug itself, with KMSAN is enabled, qemu cannot boot my vm >> any more. Anything special I need to do in order to boot a KMSAN kernel? >> > Does the kernel print any specific errors to the serial console while > booting? Or nothing at all? In my case, nothing at all. >