From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (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 B57C43594E; Fri, 21 Feb 2025 01:05:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.165.32 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740099916; cv=fail; b=eHls3RLF93a456yuivORd7nCDtWCm01UuQH1urEQjCuhNYAAsvM3vKEHtgxmj2Bjkv+PzC7QWbjHEf7Bfx6Ob6cijGP8Og4OhqgGdjKhp0tKkRbNtReofhFGNDVLRsmzxlznBAx1X2oNwj30kAf4Ou5k9oxRY1jjenl/sPMC13g= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740099916; c=relaxed/simple; bh=kurH7NV9InOZYDEI2aj9OCOI2SpnC/eV9HdfpYU2gMg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: Content-Type:MIME-Version; b=QdCyoB7DmFcxguHQzQEzWAfX5tKRC+AyBgGwj6Ted3wM9jPXnL8ua2xsCJX8wh9sYOI72JI2o7oXWAqAGclv+0zwrM1fZNb96GMW+fVQygIaGnoFBCvMXN7Kd/yHPLExAkqA8B2YNG04kFXF7ZzY/zKfeh58QrCij1suV6P0tNw= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=mpgf3+1Z; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=ArMr0i7M; arc=fail smtp.client-ip=205.220.165.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="mpgf3+1Z"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="ArMr0i7M" Received: from pps.filterd (m0246617.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 51KLrZoT013967; Fri, 21 Feb 2025 01:05:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2023-11-20; bh=j23KfGvck23upm0r7I Ed2ibNDFC2/OVd6EcON16j7qA=; b=mpgf3+1Z4LYF/fiO5gdLTbo1MgR4tBkIAF 7VbkX1H5sna6Z6V5R6S0zCkPosCznXmKZdiXw5s3pXYHn9BY57AXAJuXelfuhq91 PwGtuo6qJ949dcoNjenBOF7UF4CGhhv0o/1oRBXBTzOynEEus/pFuiJQm6VliXpx 5MzvTuVZWgAn/J/qSoD7El1aBp+ZPea0VTuWfn9OOOGF1BLLW2Ps9hGc9IaJqiYi 96fUCOcj87OOBcr+7ez7bfCkAN4i93jdqW+dj6X2RVY9PefHQdzc7d93/Zh7PYa/ uVijLqAHMydhpR+XUPBH5sSSVpmRkzKsnOPIWpkKmM5GCgGNS+lA== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 44w00nnepj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Feb 2025 01:05:10 +0000 (GMT) Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 51KMs9Ub012111; Fri, 21 Feb 2025 01:05:10 GMT Received: from nam11-dm6-obe.outbound.protection.outlook.com (mail-dm6nam11lp2175.outbound.protection.outlook.com [104.47.57.175]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 44w0b4qun2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Feb 2025 01:05:10 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=BfAFw66AlKuqRJmLGChpb3qBocaZvf4XogNoa5AE6MiP8FWOqP8/N2n8gp1ef5lMAHuDmoyzCa/3+sjxLoE2/2MGBM/uczS0+z0JaUn0HjwIBsc3U00WID+mcr7mofxS/hFJFaXW9dR4I93PVNF2Xudz8tTkZJBI2BThc80f0r6U4rfMg0HqA/Q4RsllPyL6S1BfDR0bdgbBdZU4dxOK1IEfOyadi/oGVapZQSgUe/Fz0fiAyID8W6W0iVSQGBqWN14Q094AafV9zva/EYfcrjQkMk30a1zTPQuVIbqlUfSPoVSU23GFo5bjxpyt0y3hX5AXvsimdBK7bt34pOBLlg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=j23KfGvck23upm0r7IEd2ibNDFC2/OVd6EcON16j7qA=; b=IhKJb6hw/dtWl07gOmlRpjQjH4+vHWaUafn5Uh37s3PULVPQEDbnOVSbSxlYClkPZ2u4oxJFqgZxeCEyxUfrU7Vdxx6K+rs2HljYpTf1Q0Q9FQkWjuOWchBCSnvlhPAiNB+USQo6G/jW1xGOrCbcK/CPQbi30bzAODa0BnxC9NEzbgRZdBdgyoKVJx200dpQewz2bXf8wDVM3oT2iSnixZ1+xRmaYsg3Q5wkM0q+OpG7lR5Lw62nm9xOyE9GM6qY5OOtZakhoZTnT/mcHCtshUBjK+yuWM/AtKpS+1OWlmQdxfpXEIsOYmQ+DgOOoB+YTNoTWcauCC48aXU2cFFEag== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=j23KfGvck23upm0r7IEd2ibNDFC2/OVd6EcON16j7qA=; b=ArMr0i7MhSwY7Bs18Orz77A4K36e3sU3+1HqopQRQ71O6Q8kK4PeQusBHx/IXQUwbRgTFIb4zEJdqZ5NDm9nqxE82vZ6EJ/ZgjHlClBxvzN1wUoL57tAMCOAhokmgh3Tx7bc7BnB3uJCmytpCZdRTiL0oSg1f01LQIs3QPKNrjc= Received: from PH8PR10MB6597.namprd10.prod.outlook.com (2603:10b6:510:226::20) by SJ0PR10MB6302.namprd10.prod.outlook.com (2603:10b6:a03:44e::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8445.19; Fri, 21 Feb 2025 01:05:06 +0000 Received: from PH8PR10MB6597.namprd10.prod.outlook.com ([fe80::6874:4af6:bf0a:6ca]) by PH8PR10MB6597.namprd10.prod.outlook.com ([fe80::6874:4af6:bf0a:6ca%4]) with mapi id 15.20.8445.017; Fri, 21 Feb 2025 01:05:05 +0000 From: Stephen Brennan To: Eduard Zingerman , Arnaldo Carvalho de Melo Cc: Alan Maguire , dwarves@vger.kernel.org, linux-debuggers@vger.kernel.org Subject: Re: [PATCH 0/3] Fix duplicated VAR and secinfo In-Reply-To: <1b0f9104586fa37a5480581e6dc59780b25d3b29.camel@gmail.com> References: <20250212005003.1413091-1-stephen.s.brennan@oracle.com> <1b0f9104586fa37a5480581e6dc59780b25d3b29.camel@gmail.com> Date: Thu, 20 Feb 2025 17:05:04 -0800 Message-ID: <875xl4kszj.fsf@oracle.com> Content-Type: text/plain X-ClientProxiedBy: BY1P220CA0002.NAMP220.PROD.OUTLOOK.COM (2603:10b6:a03:59d::6) To PH8PR10MB6597.namprd10.prod.outlook.com (2603:10b6:510:226::20) Precedence: bulk X-Mailing-List: linux-debuggers@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH8PR10MB6597:EE_|SJ0PR10MB6302:EE_ X-MS-Office365-Filtering-Correlation-Id: 8fc23f16-d51f-4dbf-22f2-08dd5213c70d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?zfSSPNTJWKOafSr1Duj0+7KOCjwD8Sk8PttLCgeBeermPL0l5eJ3dOZFmyZj?= =?us-ascii?Q?cY0Bxd+B/xUIDxU6X5ybf6I9N79DiphqzY+AUxKryvYIAcapdVBuwU5JLcVm?= =?us-ascii?Q?ZhGLkMo8qKy+SBA9xYlICSpECekopp17/4BvF8PDzxSFVbbu8l97qkTAv5go?= =?us-ascii?Q?AelgFcfyFkZe3G+in6I1Wo3bY+oCmsamqN4x7PGMPapCzInx4J+p1wi54U98?= =?us-ascii?Q?drcjICPhDwf/Nx3To5GN9/gf/b0NRHKcFQpLYm8qx2RMVlVWLgMpHZkCZJSf?= =?us-ascii?Q?//BmbfkoKuLQAFCT00887z3sfqwrvZjJ5KxDREl2SnoGppuXZcF5cK7IfIRF?= =?us-ascii?Q?4mYGL4UqfkoxAgSsCYoKTWyQXAvbthPZ7pw/r5yt4rhXBgX+RUzqjx0i2CTn?= =?us-ascii?Q?sot0g0xNZP7qUPh05hTP8splGm3urp7bF6g+U+3VT5KSrxLWfLaDjVk4JqNF?= =?us-ascii?Q?tlFLDx8HFGz9NteB/7TubcNFPMizTG4rfQmR7Onb4Iy2jc/qtUYalH6x2Ngg?= =?us-ascii?Q?W/Mh1pj+5lOpFCMHF1RFy//wMm97oH3Lg5YkHAD3NcXnDqU5GS1+K7CXEaO+?= =?us-ascii?Q?zLUyhJ6hocfiS6duwwXGxjeb9bXtLyDV7phjiReOS+KYDX4atF4yJkDWkyct?= =?us-ascii?Q?OgIunCc/pucZSIDxyF8ZQIXfA7//shtjTzyo/Hn4oksIVtsTA/XIZaJyeJk8?= =?us-ascii?Q?yx8y7bVu+bSRQcd+VxPCbz6h2byc9d3sxxkgvQg8LPdGbUiKxl+6HTViRoK1?= =?us-ascii?Q?neODDZ+CpsqdDulIPW37q/5NsdlLa7aTRWiN6KHcY6oEJ1OLNH/CDnhDEluN?= =?us-ascii?Q?SlHrLiicbuwC6DNpEwFD2l5OQviWY2xidgJtjMDkGJJ/kUSx2ndxovq6JVXT?= =?us-ascii?Q?EjTyG3uI/7YI0W3UVPYEtTTIKaGkjO6QCOTDZLt3Pz+fp638aqP4OKkJEQzk?= =?us-ascii?Q?TETkFyOgOQEev/CoWWg35Iq7NvGB6TNxW+puSiRALYr90g1VprBM3jUq7Mk2?= =?us-ascii?Q?UggnyuokETgb8M+Zaz/dYWxsb+IVe/FNZKmhI3R+nFxKt8eyy8TTurSS4Asi?= =?us-ascii?Q?rxM4t6obCkDTNf989accK/j3i9KTuEe8cf0P40/gA04H5KXnmjCD36NHZ/CF?= =?us-ascii?Q?rS8YcvwGsv7u6mkzhDJ8USYzUV+vHmFlLQfa1UgEzBK24+cxdfUpRWuiPSCQ?= =?us-ascii?Q?TzrvAAN5whxnSNySbh7ceMp9xs1b67uC5smrv6AKamkCU/hItHogRBw8A8m2?= =?us-ascii?Q?OgDFeHSTxpIanPQkn024ArcTBmBAp1Xz38wADHBG4Z+6GBkxpr4xFCBhfT17?= =?us-ascii?Q?XDb5rrldcTK0yxA8nCsKjHw9/q0Hpk2CZiJJbGNNNv8DAA=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:PH8PR10MB6597.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?IyWcAhwxbdh1k+4HPlJUE35kYQ0ZN28SPT1vNrrPbH3QsLNW8ppgHQhUTr/e?= =?us-ascii?Q?REtV0lvJkQAV7WUcVqb9pItzRrLhKdo2l9jFzG1umX/druzVvm/GYRkH4eK9?= =?us-ascii?Q?zD6Iw/5eulG67/Tw/Jd8lkF7Z8UbXMTNukVmD/GKlRjyB82fIy5xgddnPngg?= =?us-ascii?Q?Gb79J4Au1K8DestiqBZeNSurVmfSA6gYAJL/a8sHTpK7ee+WqrM7EBoFhHKg?= =?us-ascii?Q?WOe60viyVKUBsOYdGtF7gHZEDJn3YBWkHrlZAZkB0lD2B5/sJwlbT23hvJHe?= =?us-ascii?Q?4vx3EWNtfItUo+VLUnNlWdfTDpjJlpTetT28qTGWsC5DjmjNtoQxgvP6zzjy?= =?us-ascii?Q?7HZOXXK6ApjKrL0wFUR2c880TEG5qzdKaBFWxM7s9IvvX/iX9qn56JS0OrmF?= =?us-ascii?Q?WQHF4QTkSKiId4hqtALQw3LDkvXxh1lGULWrj8saBBO6H91FjtpIKcVodpN7?= =?us-ascii?Q?5ulz58cW5CWzo74CsMqq+KIHhGXLn0auMwYBqwEWcahVW65Vgss7g+rqyd3s?= =?us-ascii?Q?L7+n0YqXAF4Hw/O9RJXylktyf1sO2r39Uy9S0i1vKTCfcH2WSnuoPMaQlK5F?= =?us-ascii?Q?otSj3B2yFB5rr0pEQRVdngDbWjf95oDi150hgS5u5FDZ/s3gN1UXXvrQ7joq?= =?us-ascii?Q?H3TIYkB1+ZYc1kHub9DnN+UvbpXaKdH2smiwCz8KA3gyS7zh5l+yMTx1teKr?= =?us-ascii?Q?yLsOF/DICABPZ/h9xfbMklEG6eyw9s1q9gQn9EyQv7fNt4cj02bd1P02dTTL?= =?us-ascii?Q?p51UbjJl/xCdhjL+QEZF48iGicr2MBWQPZ2ZCjk2tDG6yaeqUAwzffsBoHVw?= =?us-ascii?Q?UwO9yFN4VaQuRHvA0UNvzM1vHZYJs28gioDKaKHMxGGVi00e4uUo2b0ZSfUJ?= =?us-ascii?Q?5bpo3nbMevQzTAHVyUtIupW/elsdaHLClN26fA6gTsyn5OfJyN42Gcyh+P5g?= =?us-ascii?Q?ZaUL11Iuhu77NkG14VtdCfQWPKsNGHUQRkJj4LnL5fN1DNf6m5mZUDFuwGh2?= =?us-ascii?Q?NNv+sBDr/AxpQLoXRPJHaYUHBj3/TsMajkg7ow4B0JpQ4SivLfYz+LX+8QZL?= =?us-ascii?Q?d5vR9TD8ysrNSwjLw4Cra8fjK9yPcL8/R7dvKTcstFBGotWjuhDjX5CoF6is?= =?us-ascii?Q?FibPnLY5vwjkLqeCZ3+ORgILJLpTpXUsY0/gF1VYQn3lTXg0IYemVopGIYfX?= =?us-ascii?Q?mAVdVJkiefplzLw0grXXseVtGapUeghlfGhjihRe8qcHSEksHLVYjioIYVx9?= =?us-ascii?Q?AmnXMo3QN/xHN3LCW93nPNRxnADJ/plVAFKQGLuq955JCbh5gH+ULTB419mC?= =?us-ascii?Q?RxHuGc7ooXOEYHZzdtwkRIvMj0Z0h6oGGAYiWjmH+GOFYL0pX63T5lJ5qARP?= =?us-ascii?Q?lWbBIx0GW2buX8WqqH6kzb7qQJ2WcoZ6T/xJpwqHn48y6/kg6lIMnZwl7oZc?= =?us-ascii?Q?8sF+aBzldMLPOiVIZV6UDlDal86lVdPTpVqS7IIlctFUpzks2sWrlqH1awol?= =?us-ascii?Q?qldUkielM2rU5KiNi4PusiX2+h6b2kvfBXDDm/X6WnxlMXG8sdN9r5LEtrOH?= =?us-ascii?Q?ESqAYVaoUG5qst643adkdcbXDaeerhiYs8RVn8fQ0xTeKMNJBKe794U7r/Ky?= =?us-ascii?Q?2g=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8fc23f16-d51f-4dbf-22f2-08dd5213c70d X-MS-Exchange-CrossTenant-AuthSource: PH8PR10MB6597.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Feb 2025 01:05:05.6831 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: kdhrAPhtZltBJPJUi8Kxkwm4iMRB4RFMdKY8jtBx0apbQ3kxDkwIDw8pn1qjaokmBfw4RBpVbpccSJUz+89bUccycNF8EWdUTLlKhdgDmYE= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB6302 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-20_09,2025-02-20_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 mlxscore=0 spamscore=0 adultscore=0 malwarescore=0 suspectscore=0 phishscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502100000 definitions=main-2502210006 X-Proofpoint-GUID: XJauZUqKcbXkCWVrTEHodWUyqPO4TVGO X-Proofpoint-ORIG-GUID: XJauZUqKcbXkCWVrTEHodWUyqPO4TVGO Eduard Zingerman writes: > On Tue, 2025-02-11 at 16:49 -0800, Stephen Brennan wrote: > > [...] > >> I've gone ahead and tested this by building & booting a kernel with these >> changes, and the kernel patch series at [1]. The result exhibited no BPF >> varidation errors, and the drgn BTF branch[2] is working perfectly with it! > > I tried out this patch-set: > - applied it to pahole; > - applied [1] to kernel; > - configured kernel as in [2] to run BPF selftests. > > With this all done none of BPF selftests could be run. > E.g. doing './test_progs -vvv -n 1' gets me the following error: > > libbpf: Error in bpf_object__probe_loading(): -EINVAL. Couldn't load trivial BPF program. Make sure your kernel supports BPF (CONFIG_BPF_SYSCALL=y) and/or that RLIMIT_MEMLOCK is set to big enough value. > > If libbpf is hacked to print verifier log for > bpf_object__probe_loading, the log looks as follows: > > in-kernel BTF is malformed > processed 0 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0 > > BTF is broken in some nasty way, as nothing is printed to dmesg, > even if I add some printk's inside bpf_get_btf_vmlinux(). > All I can see is that 'btf_vmlinux' is set to 0xffffffffffffffea very > early in the boot process. > > [1] https://lore.kernel.org/bpf/20250207012045.2129841-1-stephen.s.brennan@oracle.com/ > [2] https://gist.github.com/eddyz87/5282db54255b81eed731b955dc5ea690 Thank you for the testing (and the review). I haven't yet been able to reproduce this. But I see you're using clang. I'll spend the morning building & running selftests with clang to see whether that is the issue. Thanks, Stephen