From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8822F1CD1EA for ; Fri, 13 Dec 2024 11:11:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734088286; cv=none; b=IM6EMJ6CE8VXe4scFVMTdm24vdVLZkPVZzH68E+kTLuGmwRxELQhqJisZvWKMyZ0izs1rhxc9rYkeQLDhzl23tVcafwr2gIKhDkjIduZkMIEEN2vVGApzQn2oXhXcHnCst4iby7MAsPbT0seq+WWetGnxsTnmaAY7pudgfrU+Dg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734088286; c=relaxed/simple; bh=MOOKxfmActURoqpSt/rMdhbSSt+smN2K1hpvPRBS85k=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=S5NsBOT4VAyC/OxgwF5SbXPy+gsakbK98lnZCPCSh9uU5MaoXftT3gcmWt0p9TeYTgskCYfhaCRxegycF1bveiBx1IUCnsVb96/ASZrd3VHU2r0c1otFlgfmq06XM/StrQmI/BAei85G1fx82ycO2p1NzeevLBMeKfDnQ47bKNg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.79 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f79.google.com with SMTP id ca18e2360f4ac-844d02766ebso129563939f.2 for ; Fri, 13 Dec 2024 03:11:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734088283; x=1734693083; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=qQjYnieclg71ht2eON5kKXaSbM7auxwW5GWSqjs6NI0=; b=jqHjXFkOYKb+xumfWwhUrR0lue6YVz5dk0NfsRfVDInhUcURpiJMRIrRHND9/0w6Nu XTJVQWXRuhA8CieqJ8Yqur4n+cWx9GOTPJizDSbT7Ie3R0JJ9+KVV8MwEcvC2d8Jsa+x b3FVoH+CzyK+duUDaaPykshzBhva1dl+Im05n6QyOfRe01IuHhI0SLdiIYioNhtxabUt Jro6UbB63lPWyTIGHbahrgExeltzbwWy3VaQ/2IECVzBi8EB3jzh5E/mwQqRk/owCK2b V46PP55ie5y9FANwLD4SqF/uBXMKu3MpfenJI2FA9LT8kPSPQdIqN2nOxTLgXQAkTMqZ KLAg== X-Forwarded-Encrypted: i=1; AJvYcCUX2CNYT7xfM0p9fdmE5HNK854WtWrzGRXW4k8NfAuZScj6CJOi+gQCEw6PS5g41CVbs516pgepKv7bVrE=@vger.kernel.org X-Gm-Message-State: AOJu0YyPe7MZdjkZwkaaJfzQahHeIn+YO4obh/ebIIRFb1QEkpUUjr/f S7+pHDig55/7V40fWv5mjimjrt1Rq8yHVfjl0JscioyY00ZiVF/jVZTz4ZXXHOTibfwOFsNejLw xsnreUsRWNXNB8Ckp1BGrN54zuBBvOcLMYUcTsXMqt1tC2ngkZmvpgOM= X-Google-Smtp-Source: AGHT+IF0f64JG62e05+TrkDGXEOPfsDKmncCE2MraFsy7qr+AHqys0LhBGrKyVmR/uO0mqB8TdvYNpJLi9SaJ4sPL1gr3fKAwDYT Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:164e:b0:3a7:7ded:521b with SMTP id e9e14a558f8ab-3aff800f100mr19403225ab.17.1734088283734; Fri, 13 Dec 2024 03:11:23 -0800 (PST) Date: Fri, 13 Dec 2024 03:11:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <675c165b.050a0220.17d782.000a.GAE@google.com> Subject: [syzbot] [io-uring?] KCSAN: data-race in io_recv / io_wq_free_work From: syzbot To: asml.silence@gmail.com, axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 150b567e0d57 Merge tag 'net-6.13-rc3' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1013cd44580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1fe4854f351e948c dashboard link: https://syzkaller.appspot.com/bug?extid=a697a4754324488bacd7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/05e47d657c7d/disk-150b567e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/568329a94d6e/vmlinux-150b567e.xz kernel image: https://storage.googleapis.com/syzbot-assets/eab7b6a3d180/bzImage-150b567e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a697a4754324488bacd7@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in io_recv / io_wq_free_work write to 0xffff88814248b848 of 8 bytes by task 22395 on cpu 1: io_recv+0x661/0xa70 io_issue_sqe+0x150/0xc10 io_uring/io_uring.c:1736 io_poll_issue+0x1a/0x20 io_uring/io_uring.c:1767 io_poll_check_events io_uring/poll.c:289 [inline] io_poll_task_func+0x205/0x7c0 io_uring/poll.c:316 io_handle_tw_list+0xe3/0x200 io_uring/io_uring.c:1053 tctx_task_work_run+0x6e/0x1c0 io_uring/io_uring.c:1117 tctx_task_work+0x40/0x80 io_uring/io_uring.c:1135 task_work_run+0x13a/0x1a0 kernel/task_work.c:239 io_run_task_work+0x1b1/0x200 io_uring/io_uring.h:343 io_cqring_wait io_uring/io_uring.c:2594 [inline] __do_sys_io_uring_enter io_uring/io_uring.c:3434 [inline] __se_sys_io_uring_enter+0x14f5/0x1ba0 io_uring/io_uring.c:3325 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3325 x64_sys_call+0xb5e/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:427 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88814248b848 of 8 bytes by task 22396 on cpu 0: req_ref_put_and_test io_uring/refs.h:22 [inline] io_wq_free_work+0x24/0x1b0 io_uring/io_uring.c:1776 io_worker_handle_work+0x4cb/0x9d0 io_uring/io-wq.c:604 io_wq_worker+0x286/0x820 io_uring/io-wq.c:655 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x0000000085584038 -> 0x0000000085184138 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 22396 Comm: iou-wrk-22395 Not tainted 6.13.0-rc2-syzkaller-00130-g150b567e0d57 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup