From de72a20dc3714918b208430dd426c9f6a23ffaec Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 11 Apr 2016 11:15:20 +0300 Subject: [PATCH] ath10k: add some sanity checks to peer_map_event() functions Smatch complains that since "ev->peer_id" comes from skb->data that means we can't trust it and have to do a bounds check on it to prevent an array overflow. Fixes: 6942726f7f7b ('ath10k: add fast peer_map lookup') Signed-off-by: Dan Carpenter Signed-off-by: Kalle Valo --- drivers/net/wireless/ath/ath10k/txrx.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 8c7086989a71..576e7c42ed65 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -190,6 +190,13 @@ void ath10k_peer_map_event(struct ath10k_htt *htt, struct ath10k *ar = htt->ar; struct ath10k_peer *peer; + if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { + ath10k_warn(ar, + "received htt peer map event with idx out of bounds: %hu\n", + ev->peer_id); + return; + } + spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find(ar, ev->vdev_id, ev->addr); if (!peer) { @@ -218,6 +225,13 @@ void ath10k_peer_unmap_event(struct ath10k_htt *htt, struct ath10k *ar = htt->ar; struct ath10k_peer *peer; + if (ev->peer_id >= ATH10K_MAX_NUM_PEER_IDS) { + ath10k_warn(ar, + "received htt peer unmap event with idx out of bounds: %hu\n", + ev->peer_id); + return; + } + spin_lock_bh(&ar->data_lock); peer = ath10k_peer_find_by_id(ar, ev->peer_id); if (!peer) { -- 2.20.1