From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC006C77B7E for ; Mon, 24 Apr 2023 07:19:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231351AbjDXHTw (ORCPT ); Mon, 24 Apr 2023 03:19:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231307AbjDXHTs (ORCPT ); Mon, 24 Apr 2023 03:19:48 -0400 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9706410EC for ; Mon, 24 Apr 2023 00:19:46 -0700 (PDT) Received: by mail-io1-f78.google.com with SMTP id ca18e2360f4ac-7636c775952so342817639f.2 for ; Mon, 24 Apr 2023 00:19:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682320786; x=1684912786; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=FLByx+tb5N9xClS/DsZomBGA1slNzifZFIuUWr6Dpl4=; b=KR3ZKHSqmAvlYvtmnemaxMTWU8eX9h95Pvr+aG3hSxcaBL50cUUwSDdce2afhlT9V2 rTOgw2U6U5JptTaJnWEURpxY7SMxU2Qpn6rMM91xSdYw/VcYD1+U5pxILT9vVqa8zuSP L5B2ukyaWsbzku6Wxwj8/e+6gqHns26ofccDw9oSI5Qw4SiVuEDYVHgrD9h4IY/g0Y1Z Ey739WcvdWQiMS9LDq3lUq4va939GrxyY/0IA8nlXHv2cB5qZPZpIdMFk3/JIbgiw01e etgT9wR0n6YW7pdYw47L7U8TqKV5wrbNnYmHX+aRpydExhtGo2bpYUqCwmy/XZcW+HdH zmGQ== X-Gm-Message-State: AAQBX9dS9mqVgO3K9SBeBnvq2PsnKpBTU8fYOZPtzcfepGjq1wvVB3jX HTfyP0i+PQCuRHZZDhdLlL8T4jqbRHkFFXum1qyWzArZxbN7 X-Google-Smtp-Source: AKy350aVSc244kB95vKtt8mVPnmPoRok02FVSpXWyEUhaf0BU4Up28CYBn94FlLM/st5rdqmCdZGccWf7aiRpNP+Gg/m8G2shHFx MIME-Version: 1.0 X-Received: by 2002:a5d:9703:0:b0:762:e1f2:3ec3 with SMTP id h3-20020a5d9703000000b00762e1f23ec3mr3903854iol.1.1682320785898; Mon, 24 Apr 2023 00:19:45 -0700 (PDT) Date: Mon, 24 Apr 2023 00:19:45 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d7848305fa0fd413@google.com> Subject: [syzbot] [io-uring?] KCSAN: data-race in __io_fill_cqe_req / io_timeout 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" Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 3a93e40326c8 Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1280071ec80000 kernel config: https://syzkaller.appspot.com/x/.config?x=f7350c77b8056a38 dashboard link: https://syzkaller.appspot.com/bug?extid=cb265db2f3f3468ef436 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2122926bc9fe/disk-3a93e403.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/8392992358bc/vmlinux-3a93e403.xz kernel image: https://storage.googleapis.com/syzbot-assets/6398a2d19a7e/bzImage-3a93e403.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cb265db2f3f3468ef436@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in __io_fill_cqe_req / io_timeout read-write to 0xffff888108bf8310 of 4 bytes by task 20447 on cpu 0: io_get_cqe_overflow io_uring/io_uring.h:112 [inline] io_get_cqe io_uring/io_uring.h:124 [inline] __io_fill_cqe_req+0x6c/0x4d0 io_uring/io_uring.h:137 io_fill_cqe_req io_uring/io_uring.h:165 [inline] __io_req_complete_post+0x67/0x790 io_uring/io_uring.c:969 io_req_complete_post io_uring/io_uring.c:1006 [inline] io_req_task_complete+0xb9/0x110 io_uring/io_uring.c:1654 handle_tw_list io_uring/io_uring.c:1184 [inline] tctx_task_work+0x1fe/0x4d0 io_uring/io_uring.c:1246 task_work_run+0x123/0x160 kernel/task_work.c:179 get_signal+0xe5c/0xfe0 kernel/signal.c:2635 arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6a/0xa0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888108bf8310 of 4 bytes by task 20448 on cpu 1: io_timeout+0x88/0x270 io_uring/timeout.c:546 io_issue_sqe+0x147/0x660 io_uring/io_uring.c:1907 io_queue_sqe io_uring/io_uring.c:2079 [inline] io_submit_sqe io_uring/io_uring.c:2340 [inline] io_submit_sqes+0x689/0xfe0 io_uring/io_uring.c:2450 __do_sys_io_uring_enter io_uring/io_uring.c:3458 [inline] __se_sys_io_uring_enter+0x1e5/0x1b70 io_uring/io_uring.c:3392 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3392 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000c75 -> 0x00000c76 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20448 Comm: syz-executor.2 Not tainted 6.3.0-rc4-syzkaller-00025-g3a93e40326c8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 ================================================================== --- This report is generated by a bot. 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