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 X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBB7DC4338F for ; Tue, 24 Aug 2021 17:04:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A5B756138B for ; Tue, 24 Aug 2021 17:04:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236772AbhHXRF1 (ORCPT ); Tue, 24 Aug 2021 13:05:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:45866 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233322AbhHXRCh (ORCPT ); Tue, 24 Aug 2021 13:02:37 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2CE9F615A2; Tue, 24 Aug 2021 16:58:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1629824292; bh=mTDeRg+NY7pOqvN0mODZTpMz+1lkHmEhuLA18l/dae8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=inyVtPMMyCOpOEauNCinkKr3V/ClRr04dheIblkJA6YpRjkSpobMIx/5zl1NVA/gH cDoFJQt1Li2UUZobXnfrGWtEsJT+YaY/yDLN2MWpUxCkjXFfyGB+exmJHK1U1AKX7F 3B1WNtAYhHezhWFhtm8tjAknRHqkAJTSsI8H3HB5xEw4fcQLvpN6B6wvEoiJ1Iyzt5 z+Kvl+It3TSjxwaGoFBYNw8beHit2IFsry1mjuw5siBYiUZGMRagBsNIvPkNzrUznr uQb6QtlSFsRB4WGpJmhAqVndemG800/C9i1es5KtwGNB2rlM1DAti8V/lhWhj1kewt zAzCuyrTzDybg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jens Axboe , Sasha Levin Subject: [PATCH 5.13 125/127] io_uring: fix xa_alloc_cycle() error return value check Date: Tue, 24 Aug 2021 12:56:05 -0400 Message-Id: <20210824165607.709387-126-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210824165607.709387-1-sashal@kernel.org> References: <20210824165607.709387-1-sashal@kernel.org> MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.13.13-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.13.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.13.13-rc1 X-KernelTest-Deadline: 2021-08-26T16:55+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jens Axboe [ Upstream commit a30f895ad3239f45012e860d4f94c1a388b36d14 ] We currently check for ret != 0 to indicate error, but '1' is a valid return and just indicates that the allocation succeeded with a wrap. Correct the check to be for < 0, like it was before the xarray conversion. Cc: stable@vger.kernel.org Fixes: 61cf93700fe6 ("io_uring: Convert personality_idr to XArray") Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- fs/io_uring.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 221b80ae831f..9df82eee440a 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -9835,10 +9835,11 @@ static int io_register_personality(struct io_ring_ctx *ctx) ret = xa_alloc_cyclic(&ctx->personalities, &id, (void *)creds, XA_LIMIT(0, USHRT_MAX), &ctx->pers_next, GFP_KERNEL); - if (!ret) - return id; - put_cred(creds); - return ret; + if (ret < 0) { + put_cred(creds); + return ret; + } + return id; } static int io_register_restrictions(struct io_ring_ctx *ctx, void __user *arg, -- 2.30.2