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 3BED3848D for ; Fri, 10 Mar 2023 14:27:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4115C433EF; Fri, 10 Mar 2023 14:27:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678458469; bh=3ePIDLwD3Qu1A21fo0Q9MhMJmaacUPBYuEs5ui+dDu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XqCamSS2gM6x2k+epfu+AUhY4o0YUUCVDqK5hsvUWeWFayge+D/5w++UqYa4oB5et oFwkBoKtqSf0i6AR6LJ6oYPpETrfQ9IHpKI38GewpEzB5mBEI9F1244dve0mb5iLUi BKiWVV0wZa6zSlXEA5vHdH455cbvNttyOyMk0LRc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Ping-Ke Shih , Kalle Valo , Sasha Levin Subject: [PATCH 5.4 036/357] wifi: rtl8xxxu: dont call dev_kfree_skb() under spin_lock_irqsave() Date: Fri, 10 Mar 2023 14:35:25 +0100 Message-Id: <20230310133735.598171680@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230310133733.973883071@linuxfoundation.org> References: <20230310133733.973883071@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 4c2005ac87685907b3719b4f40215b578efd27c4 ] 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 to free and drop the SKB when it's shutdown, so replace it with dev_kfree_skb_irq(). Compile tested only. Fixes: 26f1fad29ad9 ("New driver: rtl8xxxu (mac80211)") Signed-off-by: Yang Yingliang Reviewed-by: Ping-Ke Shih Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20221208143517.2383424-1-yangyingliang@huawei.com Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c index 0bc747489c55a..9278f4feff745 100644 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -5095,7 +5095,7 @@ static void rtl8xxxu_queue_rx_urb(struct rtl8xxxu_priv *priv, pending = priv->rx_urb_pending_count; } else { skb = (struct sk_buff *)rx_urb->urb.context; - dev_kfree_skb(skb); + dev_kfree_skb_irq(skb); usb_free_urb(&rx_urb->urb); } -- 2.39.2