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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CY4PEPF0000FCBE.mail.protection.outlook.com (10.167.242.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8534.20 via Frontend Transport; Sun, 23 Mar 2025 19:50:54 +0000 Received: from [10.252.90.31] (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Sun, 23 Mar 2025 14:50:50 -0500 Message-ID: <791d5b5a-3204-41cf-8796-b26018824333@amd.com> Date: Mon, 24 Mar 2025 01:20:47 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter To: Oleg Nesterov , syzbot CC: , , , , , , , , , , References: <20250323184848.GB14883@redhat.com> <67e05e30.050a0220.21942d.0003.GAE@google.com> <20250323194701.GC14883@redhat.com> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20250323194701.GC14883@redhat.com> Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Mar 2025 19:50:54.6648 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 300e54d9-b91a-478b-6ec1-08dd6a44060b X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000FCBE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB9531 Hello Oleg, On 3/24/2025 1:17 AM, Oleg Nesterov wrote: > On 03/23, syzbot wrote: >> >> Hello, >> >> syzbot has tested the proposed patch but the reproducer is still triggering an issue: >> INFO: task hung in netfs_unbuffered_write_iter > > OK, as expected. > > Dear syzbot, thank you. > > So far I think this is another problem revealed by aaec5a95d59615523db03dd5 > ("pipe_read: don't wake up the writer if the pipe is still full"). > > I am going to forget about this report for now and return to it later, when > all the pending pipe-related changes in vfs.git are merged. P.S. I'm trying to repro this on my machine on latest upstream. Haven't gotten lucky yet with the C reproducer with my config. I'm moving to the the syzbot's config to see if it reveals something. If I have something I'll report back here. > > Oleg. > -- Thanks and Regards, Prateek