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 5C4EC5381 for ; Mon, 19 Jun 2023 10:45:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6CA8C433C8; Mon, 19 Jun 2023 10:45:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687171534; bh=xIhpgfWCylMW1Cmv87dSXbgtERI9Ge5C8OTZjOElVwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c8t3MGeASbRfQ2rdrZi/ZMRPEirVu6bYqQGq5mL8mjcZ/G4RRIM/VeM74yb4O3M8b 5+D0vbH9lFp75zjdleg45V/uIkldMYJTTxbcpN2ie9Mtqrh9XqdmllLNgFBbQzlSDp QqfRAhn33YZDgXnAOoCD6T8ZE/trKMuR7+JCk20o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jose Abreu , Christian Marangi , Simon Horman , Jakub Kicinski Subject: [PATCH 6.1 066/166] net: ethernet: stmicro: stmmac: fix possible memory leak in __stmmac_open Date: Mon, 19 Jun 2023 12:29:03 +0200 Message-ID: <20230619102157.989868740@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102154.568541872@linuxfoundation.org> References: <20230619102154.568541872@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: Christian Marangi commit 30134b7c47bd28fdb4db4d12aef824e0579cfee4 upstream. Fix a possible memory leak in __stmmac_open when stmmac_init_phy fails. It's also needed to free everything allocated by stmmac_setup_dma_desc and not just the dma_conf struct. Drop free_dma_desc_resources from __stmmac_open and correctly call free_dma_desc_resources on each user of __stmmac_open on error. Reported-by: Jose Abreu Fixes: ba39b344e924 ("net: ethernet: stmicro: stmmac: generate stmmac dma conf before open") Signed-off-by: Christian Marangi Cc: stable@vger.kernel.org Reviewed-by: Simon Horman Reviewed-by: Jose Abreu Link: https://lore.kernel.org/r/20230614091714.15912-1-ansuelsmth@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -3865,7 +3865,6 @@ irq_error: stmmac_hw_teardown(dev); init_error: - free_dma_desc_resources(priv, &priv->dma_conf); phylink_disconnect_phy(priv->phylink); init_phy_error: pm_runtime_put(priv->device); @@ -3883,6 +3882,9 @@ static int stmmac_open(struct net_device return PTR_ERR(dma_conf); ret = __stmmac_open(dev, dma_conf); + if (ret) + free_dma_desc_resources(priv, dma_conf); + kfree(dma_conf); return ret; } @@ -5607,12 +5609,15 @@ static int stmmac_change_mtu(struct net_ stmmac_release(dev); ret = __stmmac_open(dev, dma_conf); - kfree(dma_conf); if (ret) { + free_dma_desc_resources(priv, dma_conf); + kfree(dma_conf); netdev_err(priv->dev, "failed reopening the interface after MTU change\n"); return ret; } + kfree(dma_conf); + stmmac_set_rx_mode(dev); }