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 67370CA0FF6 for ; Fri, 1 Sep 2023 20:01:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244823AbjIAUBL (ORCPT ); Fri, 1 Sep 2023 16:01:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236019AbjIAUBK (ORCPT ); Fri, 1 Sep 2023 16:01:10 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43D3510FB for ; Fri, 1 Sep 2023 13:01:08 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-6874a386ec7so306483b3a.1 for ; Fri, 01 Sep 2023 13:01:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1693598467; x=1694203267; darn=vger.kernel.org; h=content-transfer-encoding:subject:from:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=VBz2an2I8OdGPvhS0d9juN9PWqLBnNhMGFqWjCDQMxI=; b=wtOx8gujRin0YpvDYUgwRYAI0POoGnc+B97gxOeAUrbHck99XrETp8CX4H+BGLDe6Q o/w9nR9VeppzGRXtcZyrv+dVYbUw5Mwtou/shmAE2wLmtw95YU1zH7/MSprrQMJOBhI5 cq9J9ocbH086v7CXlzW6gEydRkp4n6UqN987aFqDeTcRXxHDJRa6F573nrFYh6cwvPpq YOI7fgRD9q9CXeRyQQyLwGByA2kGK3Jyf5b7Xx3Wcy1fOFeti7mlhaJFki+S4WwVhf/N hQajo9igtSiaK31mSpecq01eUaci/jxpXtB/39ZXbfVQFcTC6efmSfDt2Mir91wVEjRn lIEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693598467; x=1694203267; h=content-transfer-encoding:subject:from:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=VBz2an2I8OdGPvhS0d9juN9PWqLBnNhMGFqWjCDQMxI=; b=beU4zApJFfzj14ZU405ABicOTs8ZqDY2NnE2UXvZeTizax8xRS89zsVGqi5tu67jo5 vhNuvm3QrAHHY4eRYMrUpKbRKUpWQkOOc8tD3GkuE6znLwEkZvK0ygIbj2kdNT67E/lL BTB7mS0w3s8pMOATMc/dxkeepQdXeqE0QfxEDjG5jyUo6LZmNKczUnSg1aCC5IZPI0YK JuZpS2lMMeZNNThXwNNNS7d61bmqBGyp9MvzGRGF4p6vw0b9mxUkMROzljGuWsxhthh9 KdKw2gZf/GzvhPI4cFB8t6kBaWzY9qKJxKNuTokaHruO8EkDkzrmbboa2V5lf+ITfga7 U3Wg== X-Gm-Message-State: AOJu0YwAHENivYhP72k8gapjpePE8U9Fl4XvJpBrt4vzuh8syQQnztWW RuTAvhojFUGQVKPFAogeoRLM0KeFIthOaYIqfmkxlQ== X-Google-Smtp-Source: AGHT+IFEt4yvEqQPg/dzACnoz5X4vGkW+KujdIIvkha+0RMqSHUr8sp+8/5CBqjtx4cWfDg8q/HPLQ== X-Received: by 2002:a05:6a00:3014:b0:68c:9c2:ab4e with SMTP id ay20-20020a056a00301400b0068c09c2ab4emr3977065pfb.1.1693598467222; Fri, 01 Sep 2023 13:01:07 -0700 (PDT) Received: from [192.168.1.136] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id g24-20020aa78758000000b0068bc44dc40dsm3300382pfo.34.2023.09.01.13.01.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Sep 2023 13:01:06 -0700 (PDT) Message-ID: <6a715702-69e6-48a0-b278-5624d0c5c58d@kernel.dk> Date: Fri, 1 Sep 2023 14:01:05 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: io-uring , Pavel Begunkov From: Jens Axboe Subject: [PATCH] io_uring/fdinfo: only print ->sq_array[] if it's there Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org If a ring is setup with IORING_SETUP_NO_SQARRAY, then we don't have the SQ array. Don't try to dump info from it through fdinfo if that is the case. Reported-by: syzbot+216e2ea6e0bf4a0acdd7@syzkaller.appspotmail.com Fixes: 2af89abda7d9 ("io_uring: add option to remove SQ indirection") Signed-off-by: Jens Axboe --- diff --git a/io_uring/fdinfo.c b/io_uring/fdinfo.c index 300455b4bc12..c53678875416 100644 --- a/io_uring/fdinfo.c +++ b/io_uring/fdinfo.c @@ -93,6 +93,8 @@ __cold void io_uring_show_fdinfo(struct seq_file *m, struct file *f) struct io_uring_sqe *sqe; unsigned int sq_idx; + if (ctx->flags & IORING_SETUP_NO_SQARRAY) + break; sq_idx = READ_ONCE(ctx->sq_array[entry & sq_mask]); if (sq_idx > sq_mask) continue; -- Jens Axboe