From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C34231FB4 for ; Fri, 3 Feb 2023 10:24:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26619C433D2; Fri, 3 Feb 2023 10:24:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675419897; bh=aNU1B65HKTeCEfVyCNfC70O/XZudIRAfxi046krNWEk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gejDrsPjcgyi0JBiY48Yomzoi4i+Y73hazUDqHDiKZOGGNCpycDZem5Q4Y8eUHgrw k1wY4PcWPJKhvEgvwyoeAyyjZ1iGaWjxSOBodOxp2D5Hs2TzB/a3AmWd4WfcJhgw1z Jem2ncvrjq1sMQKZ0Djbztd1eQthwSzNhgOKkwkU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dean Luick , Dennis Dalessandro , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.4 014/134] IB/hfi1: Reject a zero-length user expected buffer Date: Fri, 3 Feb 2023 11:11:59 +0100 Message-Id: <20230203101024.504443222@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230203101023.832083974@linuxfoundation.org> References: <20230203101023.832083974@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Dean Luick [ Upstream commit 0a0a6e80472c98947d73c3d13bcd7d101895f55d ] A zero length user buffer makes no sense and the code does not handle it correctly. Instead, reject a zero length as invalid. Fixes: 97736f36dbeb ("IB/hfi1: Validate page aligned for a given virtual addres") Signed-off-by: Dean Luick Signed-off-by: Dennis Dalessandro Link: https://lore.kernel.org/r/167328547120.1472310.6362802432127399257.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hfi1/user_exp_rcv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/infiniband/hw/hfi1/user_exp_rcv.c b/drivers/infiniband/hw/hfi1/user_exp_rcv.c index 4d732353379d..28f1b3c37a4f 100644 --- a/drivers/infiniband/hw/hfi1/user_exp_rcv.c +++ b/drivers/infiniband/hw/hfi1/user_exp_rcv.c @@ -325,6 +325,8 @@ int hfi1_user_exp_rcv_setup(struct hfi1_filedata *fd, if (!PAGE_ALIGNED(tinfo->vaddr)) return -EINVAL; + if (tinfo->length == 0) + return -EINVAL; tidbuf = kzalloc(sizeof(*tidbuf), GFP_KERNEL); if (!tidbuf) -- 2.39.0