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 BC2B61875 for ; Wed, 28 Dec 2022 16:02:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3EB3AC433D2; Wed, 28 Dec 2022 16:02:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672243362; bh=5iqSBlOnwynat1aGwPMl3fxEZQdgGlLXUiz1C0BZWC4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Phr8JdLN+6F+6HjUnFn0yHnJwjuhPqE4R1XZMkZe7k3b3E1EZ6X4UQmqgMRTvC7Uk JeVxGxv6M1Q5uJAjdfSKc+XOYz9sMb+jltMIAzlHhIE664NlX6wZ6IizyT7FFEvGZs MN6ER6rn04U3aJvbDIGkoUx0MsbnnG+8qj3qRXR4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , "David S. Miller" , Sasha Levin Subject: [PATCH 6.0 0521/1073] net: apple: mace: dont call dev_kfree_skb() under spin_lock_irqsave() Date: Wed, 28 Dec 2022 15:35:09 +0100 Message-Id: <20221228144342.193966509@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144328.162723588@linuxfoundation.org> References: <20221228144328.162723588@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 3dfe3486c1cd4f82b466b7d307f23777137b8acc ] It is not allowed to call kfree_skb() or consume_skb() from hardware interrupt context or with hardware interrupts being disabled. It should use dev_kfree_skb_irq() or dev_consume_skb_irq() instead. The difference between them is free reason, dev_kfree_skb_irq() means the SKB is dropped in error and dev_consume_skb_irq() means the SKB is consumed in normal. In this case, dev_kfree_skb() is called in mace_tx_timeout() to drop the SKB, when tx timeout, so replace it with dev_kfree_skb_irq(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Yang Yingliang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/apple/mace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/apple/mace.c b/drivers/net/ethernet/apple/mace.c index d0a771b65e88..fd1b008b7208 100644 --- a/drivers/net/ethernet/apple/mace.c +++ b/drivers/net/ethernet/apple/mace.c @@ -846,7 +846,7 @@ static void mace_tx_timeout(struct timer_list *t) if (mp->tx_bad_runt) { mp->tx_bad_runt = 0; } else if (i != mp->tx_fill) { - dev_kfree_skb(mp->tx_bufs[i]); + dev_kfree_skb_irq(mp->tx_bufs[i]); if (++i >= N_TX_RING) i = 0; mp->tx_empty = i; -- 2.35.1