Return-path: Received: from sabertooth02.qualcomm.com ([65.197.215.38]:34195 "EHLO sabertooth02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750849AbbLLNWv (ORCPT ); Sat, 12 Dec 2015 08:22:51 -0500 Cc: Hamad Kadmany , linux-wireless@vger.kernel.org, wil6210@qca.qualcomm.com, Maya Erez , Vladimir Kondratiev From: Maya Erez To: Kalle Valo Subject: [PATCH 1/2] wil6210: fix kernel OOPS when stopping interface during Rx traffic Date: Sat, 12 Dec 2015 15:22:44 +0200 Message-Id: <1449926565-888-2-git-send-email-qca_merez@qca.qualcomm.com> (sfid-20151212_142258_778812_F08BD743) In-Reply-To: <1449926565-888-1-git-send-email-qca_merez@qca.qualcomm.com> References: <1449926565-888-1-git-send-email-qca_merez@qca.qualcomm.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Hamad Kadmany When network interface is stopping, some resources may be already released by the network stack, and Rx frames cause kernel OOPS (observed one is in netfilter code) Proper solution is to drop packets pending in reorder buffer. Signed-off-by: Vladimir Kondratiev Signed-off-by: Maya Erez --- drivers/net/wireless/ath/wil6210/rx_reorder.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/wil6210/rx_reorder.c b/drivers/net/wireless/ath/wil6210/rx_reorder.c index e3d1be8..32031e7 100644 --- a/drivers/net/wireless/ath/wil6210/rx_reorder.c +++ b/drivers/net/wireless/ath/wil6210/rx_reorder.c @@ -261,9 +261,19 @@ struct wil_tid_ampdu_rx *wil_tid_ampdu_rx_alloc(struct wil6210_priv *wil, void wil_tid_ampdu_rx_free(struct wil6210_priv *wil, struct wil_tid_ampdu_rx *r) { + int i; + if (!r) return; - wil_release_reorder_frames(wil, r, r->head_seq_num + r->buf_size); + + /* Do not pass remaining frames to the network stack - it may be + * not expecting to get any more Rx. Rx from here may lead to + * kernel OOPS since some per-socket accounting info was already + * released. + */ + for (i = 0; i < r->buf_size; i++) + kfree_skb(r->reorder_buf[i]); + kfree(r->reorder_buf); kfree(r->reorder_time); kfree(r); -- 1.8.5.2