From 54f9ab7b870934b70e5a21786d951fbcf663970f Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 13 Aug 2020 17:13:15 +0300
Subject: [PATCH] ath6kl: prevent potential array overflow in ath6kl_add_new_sta()
Git-commit: 54f9ab7b870934b70e5a21786d951fbcf663970f
Patch-mainline: v5.10-rc1
References: git-fixes
The value for "aid" comes from skb->data so Smatch marks it as
untrusted. If it's invalid then it can result in an out of bounds array
access in ath6kl_add_new_sta().
Fixes: 572e27c00c9d ("ath6kl: Fix AP mode connect event parsing and TIM updates")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200813141315.GB457408@mwanda
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/ath6kl/main.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/ath/ath6kl/main.c b/drivers/net/wireless/ath/ath6kl/main.c
index 210218298e13..d3aa9e7a37c2 100644
--- a/drivers/net/wireless/ath/ath6kl/main.c
+++ b/drivers/net/wireless/ath/ath6kl/main.c
@@ -430,6 +430,9 @@ void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid);
+ if (aid < 1 || aid > AP_MAX_NUM_STA)
+ return;
+
if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) {
struct ieee80211_mgmt *mgmt =
(struct ieee80211_mgmt *) assoc_info;
--
2.16.4