From dea16eddb4753129dbcd8dc8d1a58ff0cc4ea38c Mon Sep 17 00:00:00 2001 From: Hamad Kadmany Date: Wed, 16 Dec 2015 17:51:45 +0200 Subject: [PATCH] wil6210: fix kernel OOPS when stopping interface during Rx traffic 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: Hamad Kadmany Signed-off-by: Vladimir Kondratiev Signed-off-by: Maya Erez Signed-off-by: Kalle Valo --- 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 e3d1be82f314..32031e7a11d5 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); -- 2.30.2