From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 887F0C678D6 for ; Mon, 16 Jan 2023 16:31:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233309AbjAPQbf (ORCPT ); Mon, 16 Jan 2023 11:31:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233262AbjAPQa5 (ORCPT ); Mon, 16 Jan 2023 11:30:57 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 479E827D7C for ; Mon, 16 Jan 2023 08:19:30 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D9C0661040 for ; Mon, 16 Jan 2023 16:19:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F0D0CC433F0; Mon, 16 Jan 2023 16:19:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673885969; bh=IR9kgO6deBCk1Uo8VGDgi+Vfjls7NPP+KfVUJetAy5Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bO0GDINUfD5+5og4t6fQn0DUaS9CI2q5k2ESUOGIYlL9r+D3lYH2pExiUai5uSFdY oo7/er8A2Qoeas8vkZ3fKpC/5lkAGHoQZaS+/ggXke1SOkO1Re0YljmLzOVN+NS2/b E6+GEuzM1sPHTm/UlqrrJWLfVHV0MnQ8+2RPoHYs= 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 5.4 222/658] net: apple: bmac: dont call dev_kfree_skb() under spin_lock_irqsave() Date: Mon, 16 Jan 2023 16:45:10 +0100 Message-Id: <20230116154919.658936493@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154909.645460653@linuxfoundation.org> References: <20230116154909.645460653@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yang Yingliang [ Upstream commit 5fe02e046e6422c4adfdbc50206ec7186077da24 ] 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 bmac_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/bmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/apple/bmac.c b/drivers/net/ethernet/apple/bmac.c index 3e3711b60d01..11d9884eb14d 100644 --- a/drivers/net/ethernet/apple/bmac.c +++ b/drivers/net/ethernet/apple/bmac.c @@ -1511,7 +1511,7 @@ static void bmac_tx_timeout(struct timer_list *t) i = bp->tx_empty; ++dev->stats.tx_errors; if (i != bp->tx_fill) { - dev_kfree_skb(bp->tx_bufs[i]); + dev_kfree_skb_irq(bp->tx_bufs[i]); bp->tx_bufs[i] = NULL; if (++i >= N_TX_RING) i = 0; bp->tx_empty = i; -- 2.35.1