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 8212E749D for ; Thu, 12 Jan 2023 14:17:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D94CAC433D2; Thu, 12 Jan 2023 14:17:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673533072; bh=R6yTPwpBsO8+EctjvMjDDr9lv8BYBR5gIDh0hZvoGPY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ROe7TTgaJcJuIRrEBblvLCKRKcDZdkoFdkYCuYXWrlchxCqLN7gCs8X5XS4AYURdz 4Nk0BJr/rUU0oZeNKHTwQcUzHIEyysch9ZHj3Jfik6d5WwMctgZtjwTciVtNKn4pxw l/llk/xx7cvx7aDchvIBZbOtHi2ydeG2Gyfq6YXE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Andrew Donnellan , Frederic Barrat , Sasha Levin Subject: [PATCH 5.10 360/783] misc: ocxl: fix possible name leak in ocxl_file_register_afu() Date: Thu, 12 Jan 2023 14:51:16 +0100 Message-Id: <20230112135541.029164281@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230112135524.143670746@linuxfoundation.org> References: <20230112135524.143670746@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: Yang Yingliang [ Upstream commit a4cb1004aeed2ab893a058fad00a5b41a12c4691 ] If device_register() returns error in ocxl_file_register_afu(), the name allocated by dev_set_name() need be freed. As comment of device_register() says, it should use put_device() to give up the reference in the error path. So fix this by calling put_device(), then the name can be freed in kobject_cleanup(), and info is freed in info_release(). Fixes: 75ca758adbaf ("ocxl: Create a clear delineation between ocxl backend & frontend") Signed-off-by: Yang Yingliang Acked-by: Andrew Donnellan Acked-by: Frederic Barrat Link: https://lore.kernel.org/r/20221111145929.2429271-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/ocxl/file.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index e094809b54ff..524ded87964d 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -543,8 +543,11 @@ int ocxl_file_register_afu(struct ocxl_afu *afu) goto err_put; rc = device_register(&info->dev); - if (rc) - goto err_put; + if (rc) { + free_minor(info); + put_device(&info->dev); + return rc; + } rc = ocxl_sysfs_register_afu(info); if (rc) -- 2.35.1