From patchwork Mon May 4 17:57:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226387 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 95E4DC3A5A9 for ; Mon, 4 May 2020 18:09:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 77389205C9 for ; Mon, 4 May 2020 18:09:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615760; bh=0+Wqi8i5cFJHZoi20Re0WmALTJjaX7zj9XsDPNl2Jts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bSd9ncpWt5rXITVVLioDkFREPhMv14MIbkFOFEtQUtM7SsRgnvdZ8lHrWujdEtNos 8u3fQPiM4uwZN5lPLaReI4fKbPeAfuEaXH2FpRpsERNqWd8a5C/6Fq/fRksbo3qG9k w0h3phlxjGQRYUhNUZBNi9ooIxUtvq/e/i6Mqj6M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732030AbgEDSGu (ORCPT ); Mon, 4 May 2020 14:06:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:37372 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732024AbgEDSGt (ORCPT ); Mon, 4 May 2020 14:06:49 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4E2C0206B8; Mon, 4 May 2020 18:06:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588615608; bh=0+Wqi8i5cFJHZoi20Re0WmALTJjaX7zj9XsDPNl2Jts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rAR1tXtUAQRNNZFAJChu2DY2sTgArDQrBfe+KRqHDio+VV3DF0IeZc3LgzyRFIJh8 eQ60usH9R4IR5zLV7a4bsFZmLvi1RvfnorS7OSXBzsA5DRbVwr1dDXMOF5OhO+q621 xaevUq5lh7ZNwTbE0GqIkFkcx3Qtl8hLlhifCl6c= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , "Matthew Wilcox (Oracle)" , Jason Gunthorpe Subject: [PATCH 5.6 51/73] RDMA/cm: Fix an error check in cm_alloc_id_priv() Date: Mon, 4 May 2020 19:57:54 +0200 Message-Id: <20200504165509.204224158@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200504165501.781878940@linuxfoundation.org> References: <20200504165501.781878940@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Dan Carpenter commit 983653515849fb56b78ce55d349bb384d43030f6 upstream. The xa_alloc_cyclic_irq() function returns either 0 or 1 on success and negatives on error. This code treats 1 as an error and returns ERR_PTR(1) which will cause an Oops in the caller. Fixes: ae78ff3a0f0c ("RDMA/cm: Convert local_id_table to XArray") Link: https://lore.kernel.org/r/20200407093714.GA80285@mwanda Signed-off-by: Dan Carpenter Reviewed-by: Matthew Wilcox (Oracle) Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/core/cm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -836,7 +836,7 @@ struct ib_cm_id *ib_create_cm_id(struct ret = xa_alloc_cyclic_irq(&cm.local_id_table, &id, NULL, xa_limit_32b, &cm.local_id_next, GFP_KERNEL); - if (ret) + if (ret < 0) goto error; cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; xa_store_irq(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id),