From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (mail-mw2nam12on2070.outbound.protection.outlook.com [40.107.244.70]) (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 D56FB1E00BE; Wed, 19 Feb 2025 13:25:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.244.70 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739971546; cv=fail; b=dNipcX+ytaWpKeyPbMW3DfyQ4PLrvcSvHixfv2t+3UDz7iuZhkOCdfsdU0XFA+JyYij2Rvmh3lfn6dM2NyJ4wXqvZ4s5BBrflM3Z0jd1TmSswJhfLLVfwX1tvETkpaFsLk48Lzbi0zqfDM59jBETx7SymOnH/ZXcEsfPiTX6LuI= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739971546; c=relaxed/simple; bh=0Cc48uHlKe9GtTKHlQVknq/Kyp8XVx2BQtrWKC4AaiU=; h=Date:From:To:Cc:Subject:Message-ID:References:Content-Type: Content-Disposition:In-Reply-To:MIME-Version; b=sCM2K+wFnXysAjHhlrq4mgfSxWPAA8sbrDUjAdCdTdH81tPJvqK5KuPllpmHoOOgigxTNTDKDaLz3Pftc7XW1Uj4qlvxaKjIp68FyEKW/WorOTGYrTEVvAhyxYEgyHx7ypCwL9/0RxFSnsgQ48NK37BWduZQRkKul+sL/mIzmqM= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=Ik9y7GuE; arc=fail smtp.client-ip=40.107.244.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="Ik9y7GuE" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=GJmDOQmOgwrAdxszDJ9N7eQ3G18TWTzCsU302XBg6eMgusII8LQsp1y21oHbe+FDjfk72J91QbAugnfIEQ0mM8m/QEMhwezool0TPYUPMmOTupv80taxMOaWUPPozfky649+Mq+tSAF1kgkHHBaZnW9hQgZsTYmIrE95Cw8igQSfihu8DqU4MAC1COX7EGZxeana0nAel5+ZAWC1onQrBudIsrZqEV+tleJj55obLv0fR9tdA0a+1D6hugxRBWY9QOxdzjSg1e01AmSjw+0dZ7Da/eiE4hWgOnmdk4rWC3RbR/CPh2lRp0IfbRcZVZU0nxv4n8nbhQ8Gl+q8vB3KIA== 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=+MXFFtkqEOnxl4kf3QQ3+C8nFe7Uh8zGA/0XZNy/ST0=; b=iOea03axdSDMX62Q73OKjofMNxYzEfutmnxDa9BqykU2dlunE13r8j0B+73kKNli1hsPGW0t1f0jkAFeCiEWXZ8u/5w/UFawN76gPZfAx8F2ocColmyg8QAi6vLFgi4ImAolg7bC4a6sDwNd3F0wuieU0dW7b8UpgHd+9dyaJQ47BK+rLAPbhMf63vFI0lkDOpgNWEYQWZQMsYxZBF2WEkbU/ZNmuUYpKbEfCKXr4Lj8v71p157LfHSxBPGj4nToLHhz8W8Pti4uSWarxIaE2UFfO424ErJdkx0wuwBCOadPkzXVYu0gm+PB/4GxR9nKf3nUJ6Jx50nh5lamtrjQAQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=+MXFFtkqEOnxl4kf3QQ3+C8nFe7Uh8zGA/0XZNy/ST0=; b=Ik9y7GuENz0JYM9+pOAl3Z0K//k8rXaQpmjYyFigNjPG/BrPlsiBK+rXgxC0ZAURQonLtaBF3kqDFKVRv+PlZwXC2nd+Ej9UvW2ZjwZvCD+aINCWmGnX6CD+em0VCtYeSitgmAdZpzKOUOL0u8LxQ9o/WrTvoPjzymxWKkWgJIJ7pyf6/7nmYfiFkfk3HVWEzFbSLwFMZ6vVHipknZqzE9EU2CvcwqOjvsslNcsF2kmmsbMqH2sJa+09krKl1uWu1hTXjLl3Dqks3BQJeGcyWapc9mmfCn3pfMWfzW3gW3xQPJ1uuhSHns93npu5/UyGbOQzex0jurXM2xYM4y3QBA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from SN7PR12MB8059.namprd12.prod.outlook.com (2603:10b6:806:32b::7) by IA0PR12MB8906.namprd12.prod.outlook.com (2603:10b6:208:481::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8445.19; Wed, 19 Feb 2025 13:25:41 +0000 Received: from SN7PR12MB8059.namprd12.prod.outlook.com ([fe80::4ee2:654e:1fe8:4b91]) by SN7PR12MB8059.namprd12.prod.outlook.com ([fe80::4ee2:654e:1fe8:4b91%5]) with mapi id 15.20.8445.017; Wed, 19 Feb 2025 13:25:41 +0000 Date: Wed, 19 Feb 2025 08:25:38 -0500 From: Joel Fernandes To: syzbot Cc: jiangshanlai@gmail.com, josh@joshtriplett.org, linux-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, paulmck@kernel.org, rcu@vger.kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [rcu?] WARNING in srcu_invoke_callbacks (2) Message-ID: <20250219132538.GA468969@joelnvbox> References: <67b4c7af.050a0220.14d86d.000a.GAE@google.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <67b4c7af.050a0220.14d86d.000a.GAE@google.com> X-ClientProxiedBy: BL0PR02CA0136.namprd02.prod.outlook.com (2603:10b6:208:35::41) To SN7PR12MB8059.namprd12.prod.outlook.com (2603:10b6:806:32b::7) Precedence: bulk X-Mailing-List: rcu@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN7PR12MB8059:EE_|IA0PR12MB8906:EE_ X-MS-Office365-Filtering-Correlation-Id: 33473865-b771-4c23-2bed-08dd50e8e7db X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?qi0ysM5omZHXp5Q6yz2cNFyVb+dA9y+qPhQ2WQPAYkdHMQhI5Xqa71UXvsWC?= =?us-ascii?Q?ZY+MQDajQc87ou+YClFYWaQOjy32lAxKvd7PM1/2DIK/esaoLofHgT9S1/r7?= =?us-ascii?Q?rNIERfmD8754Km1S5TcS3s0vCyukgepJwYaJ1E2qGiKl0wqtbnRiHVB+Wq61?= =?us-ascii?Q?wHSwIO61R3hzxmumIH73sTfEjbd2gLKaWwWTIbnkB2xoly2tuoIxxPBbuqMY?= =?us-ascii?Q?ndma/Qx4lMh3G3Bf6bXRySVjpN3Gb6GvjgNNctIF64IAjjFTaD4VSpPcUfa/?= =?us-ascii?Q?4QB74DVgVfwbl2wXCn8gXgK7s89dq6qOQoeX+Y+yKQp7HtiRLUbi8toWwBey?= =?us-ascii?Q?0k+GQzocFsv6y8StJInmwub13tNOaLN8Z4KuxJAd9xrWU5JDck+0aI/iBD2n?= =?us-ascii?Q?azgmJOu7SrTXJCaxi7Ws6C0b6TI1J6ApRXbs8EKSz06AMSlEkiCEAtHaknEY?= =?us-ascii?Q?UjHyYlojuCoqZZDQY5pntR6HUCSk8Kgs7DbN57CrZIRAHdC1HqehGKS8edb8?= =?us-ascii?Q?xeNLALd6ueTBnM4A99qxFTmUZ0El6JuuMlDJsJX/eCtoGtHIktS43NOU2QXf?= =?us-ascii?Q?ghDaNT7r0Z552Vgg2fOMJPc+0GKzFNHQn7xBKmGjqpukrGSTYGYqD7biJm69?= =?us-ascii?Q?JBIs2kwkIQ3ygyiEdEJAkU9JeeRlPfFqyWk82Fo1b1L42wQtIN50LdNscDFD?= =?us-ascii?Q?/OB/aQRd5mamVz+YwYEoGfdL/Cij4OsFhpAummaV5xsGos9wNjI09SnU5DeE?= =?us-ascii?Q?JEgu8m/U+U47OqzSyxQu+hymePMrvcNrr0dO7SgdZH9g/dKPzJf6i6zHI040?= =?us-ascii?Q?01F8msCOufbAf7+pocP9P2Yl5ifbo5PdFVlWtSgUa9MVBkqJPQy06OMnEeCp?= =?us-ascii?Q?JnhEz5yMKThMtJB7DrxE+QXDZfhzAaBD6EErmOXLxeNtIMVMk/EzKUWgQCkU?= =?us-ascii?Q?YpFXRNSFKejigEc9dBVdNb8a5+OW3J2xxTJbdzX4SK93YojRj1AlRpnHsffC?= =?us-ascii?Q?xAyQAkO7tGfMZp/bPXPzuN8KjYFAKxqdE0a6b4NoAl4Bu7TTIkCQ8k6d00lq?= =?us-ascii?Q?Mt9OP65ODEleL/ipb3XsJ2oJe0ZXMlvIASKdBnlHHwn4olGFfRfXcHEMNusZ?= =?us-ascii?Q?+O/wcEv8P95FqTnlc73tELfJeevhcTjsPSqFqtqShQttVNfpigiI8ImO3RpC?= =?us-ascii?Q?7sYRM7n+y8jQjdrGV3HPbuPwd1L9Y7lkqcafOzkRO4c4YWZNzPGgiPxZMSrS?= =?us-ascii?Q?hLslymIUxtPpgxgKuRCvi+7PjQj0qwi3iPTYRtqCAGZ4xLmo1rbePFme/q+2?= =?us-ascii?Q?4WDQAGMRmlq2Lm+ZaNY9PzckywKnLHAnSdQvpN7UKfNVsYJVROmVdJJuEyGM?= =?us-ascii?Q?CIJW4m6ikeBpM+wWOa9LG6gekFKd?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN7PR12MB8059.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(376014)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?n/Zp23q4N4+N2nuYeLWhzZIGvKwq0Ow6H14mKqQpz2nhLBWqDp4tTlNsfcln?= =?us-ascii?Q?LHXS2tYifi9htE5aQixy6XD7TYFwJ/wunxlgzPjHiWfWj6igFmhWemCJrRmM?= =?us-ascii?Q?Ip4FmlIxg+FZrUNbREpSAwnS7pX+/cUBp6U1S51cQ+Vm/cIddbYtg/URfeYR?= =?us-ascii?Q?XeXVJ9FG6JfiFRBO0E8CKTUtTjzL+qoenTf8CK0Q+PLiy08lrizCrzTXSBJz?= =?us-ascii?Q?0LGubjz9CwxpEl/xYDVO5JgW+QuhEmD/ocBmj9K60eNaqHqdKPpRo7TYBcm9?= =?us-ascii?Q?mrJrc1axwl3iAyDM8s/AwPKJqEHKhn5XHzPOy3Vfzn/O2ZTAvZBRxCQ1qmPw?= =?us-ascii?Q?raRHYt7aOfTmA0bU3r7iLXgV/NNB0ONYZTMAus4GkdfdaXBvW4mzpe9zPWlJ?= =?us-ascii?Q?URjVKXjShLv9Qr3Z7tWifKCghEHp0tg536mFujF7FfIV74Rn2zP653cZOF2Q?= =?us-ascii?Q?xWIsEuoHsR+lUvB9oOJTX//knC7RPhvHaVghsUzH2ptkF7DCuYr/m+2HJO4g?= =?us-ascii?Q?FpQ9FtfDxwJgYlOwLpch+TCF/jCNvOe5PxN+V6WlnsHAUFZa6utVkfJAq9yH?= =?us-ascii?Q?zTwbGKLS4Qq2C6/5ZmB7xWu6JwlrW18Vye8xJJqSgbD9JE7BvCsNMTi/jyo1?= =?us-ascii?Q?+3TXVJUkmCHm4LoPvF7lXFqvshCi6tqehujS+0tnzOP/GxyZsMvPwkIncIEf?= =?us-ascii?Q?AtgjXpHLjkA3o4Px5iY5kkrbOGQrlWc0kY4kzycAxK4efzFc13CdeDhhknJJ?= =?us-ascii?Q?qchgv1+4NKAkmPFbThwHzu3orC1goL1RBcgh9qRGen5sN3SeBrukFTS9rhrR?= =?us-ascii?Q?a5sHRkQqr339wQwsHiaz3UQFKpY3O4Pmp5XmrHA/2IJyOI83iLvPMaCc4QtU?= =?us-ascii?Q?B6ubm9REPfhPUCfWdxju6XguKXOgWqicowMNAi8NLlkFTZ1L3nGVWgAZErZ6?= =?us-ascii?Q?vX3w8GeDZRNTXHv3rhjy9AOHuUMpEn9TpeMvCycJoxCd3iP2P4uCUZLF2tcT?= =?us-ascii?Q?fomCzm5TCDfNAUqtXWcSWetSb05DPr9Kci4RhtlOYXW/KxGU2qbnaL98U6LG?= =?us-ascii?Q?YQe3kRa+yvttgO1pwqQepswi3EKbK72cgxUXBLkxJzk2Jv8JdAv3/ZiBujkC?= =?us-ascii?Q?5b3366LlNfanXpc9B/0zWUa4RrFn+En0S/Ow/L8L0XlxtI7mzlwQirhwxyq0?= =?us-ascii?Q?n7Or02HrRI37oIhc52Yqt7Rksx8AxHxx74oArZHMrwPy/Wjg7FB56ShguuAI?= =?us-ascii?Q?XwrmF9NMEbVY9wDIBo0+Zs/n65TsMFNCy46vl7tqd1mVwTbz6djicdiSAIIF?= =?us-ascii?Q?Pc3FbX2HBCemREeeEsJcHV6qp7w9N0q5nQuZpWxg8CTbWVXt7DIIkrKxERtP?= =?us-ascii?Q?W+8Alo8XTWFyhJtzcOh/iuZ36gBBqp6xVuqWeDXCJH6vTUrAzXyPpgI/3VfL?= =?us-ascii?Q?sLeaSeR+scKLp0T3nCze1B44F8gSiDXPYMWs21YgIymkShhZe6pxJFPnowOu?= =?us-ascii?Q?fDNzGAHIZehCyNvku/dnqdvx6do24No0nnpsDltpB1MLLx6w2qbi5532lRxf?= =?us-ascii?Q?rPizCjHvhI0bFNRdU3X8YGLolgT18f239yZDbccK?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 33473865-b771-4c23-2bed-08dd50e8e7db X-MS-Exchange-CrossTenant-AuthSource: SN7PR12MB8059.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Feb 2025 13:25:41.0472 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: mMg9lJN7AE1EkTgLKf+rwI7F7m/ztqSqDEuK/5Ma9BCv5XfEHY5YUqSdSZ/ZmkRXZkcsGR65AHuoxhD8IYEqMg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8906 On Tue, Feb 18, 2025 at 09:47:27AM -0800, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: a64dcfb451e2 Linux 6.14-rc2 > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=12398f18580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c9c47badcd079906 > dashboard link: https://syzkaller.appspot.com/bug?extid=ae5b16688c0c675b1a1f > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > userspace arch: arm64 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/c0a862fcec77/disk-a64dcfb4.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/f03793fc001b/vmlinux-a64dcfb4.xz > kernel image: https://storage.googleapis.com/syzbot-assets/ae71c33eae14/Image-a64dcfb4.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+ae5b16688c0c675b1a1f@syzkaller.appspotmail.com > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 6430 at kernel/rcu/srcutree.c:1798 srcu_invoke_callbacks+0x368/0x3d8 This is weird, happens to be WARN_ON_ONCE(ready_cbs.len); in srcu_invoke_callbacks(). Perhaps, stack corruption or the SRCU cblist's ->seglen got corrupted? thanks, - Joel