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AJvYcCUrVAiW2+ysaMM7kocyCoDH4Kio2HJ+IuiwcMm5jk2RXAMYyWNNdKPkfuH5VYSKvs6LFcE7BR9cdA==@vger.kernel.org X-Gm-Message-State: AOJu0YwYf9bMy/QijYzBCBqHykyyAPopyZBNIq8iUeByD3Ped7Oi5ay0 w6Z1hnPJeu1Rg+90h10SytIYwnIowSecKzEj6btgnz9p/LgzJqYWpvSOk+SCpAI= X-Google-Smtp-Source: AGHT+IFcapSkOX/3D7DFAqGCa3Tu97Ds42ZW3VkvwgARCp5b9XKgHmssf1p+2DCRXRMJ5+7m68Kv0g== X-Received: by 2002:a05:6a20:c6ce:b0:1d9:77a0:20c7 with SMTP id adf61e73a8af0-1d9a81ba801mr5444518637.0.1729987632847; Sat, 26 Oct 2024 17:07:12 -0700 (PDT) Received: from [192.168.1.150] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7205791e54asm3256765b3a.30.2024.10.26.17.07.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 26 Oct 2024 17:07:11 -0700 (PDT) Message-ID: Date: Sat, 26 Oct 2024 18:07:10 -0600 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [io-uring?] INFO: task hung in io_wq_put_and_exit (4) From: Jens Axboe To: syzbot , asml.silence@gmail.com, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <671c817d.050a0220.2b8c0f.01ad.GAE@google.com> <5ed947b0-5762-4631-8633-b737bc09eebf@kernel.dk> Content-Language: en-US In-Reply-To: <5ed947b0-5762-4631-8633-b737bc09eebf@kernel.dk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/26/24 7:44 AM, Jens Axboe wrote: > On 10/25/24 11:43 PM, syzbot wrote: >> syzbot has found a reproducer for the following issue on: >> >> HEAD commit: b423f5a9a61f Merge tag 'acpi-6.12-rc5' of git://git.kernel.. >> git tree: upstream >> console+strace: https://syzkaller.appspot.com/x/log.txt?x=1393565f980000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=fd919c0fc1af4272 >> dashboard link: https://syzkaller.appspot.com/bug?extid=58928048fd1416f1457c >> compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=122f04a7980000 >> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=132cbe40580000 > > Perfect thanks, we'll take a look. Took a look, and it's one of the usual stupid cases of "let's just flood it with things and exit will take a while". In this case it's adding a ton of classic provided buffers, and then exit takes a while to prune them. Not convinced there's a real bug here, outside of the config have lots of debug options that slows everything down. It'll finish eventually, it'll just take a while with how it's being used. -- Jens Axboe