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 913458F57 for ; Mon, 13 Feb 2023 14:53:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E49FBC433D2; Mon, 13 Feb 2023 14:53:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1676299989; bh=ynkc7p+vQSO7aJs0qHyZwSYXlgXJ4AXGD6bY1HBRZoY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D22XOWwj72EhrtbcVpFBRlw4OcgMJe/+dcdc9ncUBeGDcqRs6xOQiA2sXxtpTSv9l UZtEln3peW14aeFru0BUlGLDVbObKYtjXkJbKFDdFBf3H4f439jEg8sxkeV7JPAHOd byc5c/5PlaQq9N1pGRzHd1BM7999FykqR9pUbe9M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nikita Zhandarovich , Sindhu Devale , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.1 021/114] RDMA/irdma: Fix potential NULL-ptr-dereference Date: Mon, 13 Feb 2023 15:47:36 +0100 Message-Id: <20230213144743.247946326@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230213144742.219399167@linuxfoundation.org> References: <20230213144742.219399167@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: Nikita Zhandarovich [ Upstream commit 5d9745cead1f121974322b94ceadfb4d1e67960e ] in_dev_get() can return NULL which will cause a failure once idev is dereferenced in in_dev_for_each_ifa_rtnl(). This patch adds a check for NULL value in idev beforehand. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 146b9756f14c ("RDMA/irdma: Add connection manager") Signed-off-by: Nikita Zhandarovich Link: https://lore.kernel.org/r/20230126185230.62464-1-n.zhandarovich@fintech.ru Reviewed-by: Sindhu Devale Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/irdma/cm.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/infiniband/hw/irdma/cm.c b/drivers/infiniband/hw/irdma/cm.c index 7b086fe63a245..195aa9ea18b6c 100644 --- a/drivers/infiniband/hw/irdma/cm.c +++ b/drivers/infiniband/hw/irdma/cm.c @@ -1722,6 +1722,9 @@ static int irdma_add_mqh_4(struct irdma_device *iwdev, continue; idev = in_dev_get(ip_dev); + if (!idev) + continue; + in_dev_for_each_ifa_rtnl(ifa, idev) { ibdev_dbg(&iwdev->ibdev, "CM: Allocating child CM Listener forIP=%pI4, vlan_id=%d, MAC=%pM\n", -- 2.39.0