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 DD20D1C29 for ; Wed, 23 Nov 2022 09:34:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 54EE2C433D6; Wed, 23 Nov 2022 09:34:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669196043; bh=BjzpT8W5+vTLmjOFG+7GRxwb4/8KZJenJTSu7Ow6y+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bIUgFmnXOXa3AIwY5/iklLE5h+EuugagQ3ijIgFxnCL3hic9Pq58k4Wqe6kFPaUDU 1R4q8gC45+FYvXvCOt8PP1Xpa8omClFJ+wjxmUUPCe/XDmgFwWY3GMAcL1UJT6IKvo THDd3LSuohsxi2swi/kWGTGvo3726TvP066l2hzs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yuan Can , Mika Westerberg , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 104/181] net: thunderbolt: Fix error handling in tbnet_init() Date: Wed, 23 Nov 2022 09:51:07 +0100 Message-Id: <20221123084606.823757330@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123084602.707860461@linuxfoundation.org> References: <20221123084602.707860461@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: Yuan Can [ Upstream commit f524b7289bbb0c8ffaa2ba3c34c146e43da54fb2 ] A problem about insmod thunderbolt-net failed is triggered with following log given while lsmod does not show thunderbolt_net: insmod: ERROR: could not insert module thunderbolt-net.ko: File exists The reason is that tbnet_init() returns tb_register_service_driver() directly without checking its return value, if tb_register_service_driver() failed, it returns without removing property directory, resulting the property directory can never be created later. tbnet_init() tb_register_property_dir() # register property directory tb_register_service_driver() driver_register() bus_add_driver() priv = kzalloc(...) # OOM happened # return without remove property directory Fix by remove property directory when tb_register_service_driver() returns error. Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable") Signed-off-by: Yuan Can Acked-by: Mika Westerberg Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/thunderbolt.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/drivers/net/thunderbolt.c b/drivers/net/thunderbolt.c index ae2211998ded..129149640225 100644 --- a/drivers/net/thunderbolt.c +++ b/drivers/net/thunderbolt.c @@ -1377,12 +1377,21 @@ static int __init tbnet_init(void) TBNET_MATCH_FRAGS_ID | TBNET_64K_FRAMES); ret = tb_register_property_dir("network", tbnet_dir); - if (ret) { - tb_property_free_dir(tbnet_dir); - return ret; - } + if (ret) + goto err_free_dir; + + ret = tb_register_service_driver(&tbnet_driver); + if (ret) + goto err_unregister; - return tb_register_service_driver(&tbnet_driver); + return 0; + +err_unregister: + tb_unregister_property_dir("network", tbnet_dir); +err_free_dir: + tb_property_free_dir(tbnet_dir); + + return ret; } module_init(tbnet_init); -- 2.35.1