linux-kernel - [PATCH 5.11 556/601] ath10k: Fix ath10k_wmi_tlv_op_pull_peer_stats

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Date:   Wed, 12 May 2021 16:50:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 556/601] ath10k: Fix ath10k_wmi_tlv_op_pull_peer_stats_info() unlock without lock

From: Shuah Khan <skhan@...uxfoundation.org>

[ Upstream commit eaaf52e4b866f265eb791897d622961293fd48c1 ]

ath10k_wmi_tlv_op_pull_peer_stats_info() could try to unlock RCU lock
winthout locking it first when peer reason doesn't match the valid
cases for this function.

Add a default case to return without unlocking.

Fixes: 09078368d516 ("ath10k: hold RCU lock when calling ieee80211_find_sta_by_ifaddr()")
Reported-by: Pavel Machek <pavel@....cz>
Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20210406230228.31301-1-skhan@linuxfoundation.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/ath/ath10k/wmi-tlv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath10k/wmi-tlv.c b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
index e7072fc4f487..4f2fbc610d79 100644
--- a/drivers/net/wireless/ath/ath10k/wmi-tlv.c
+++ b/drivers/net/wireless/ath/ath10k/wmi-tlv.c
@@ -592,6 +592,9 @@ static void ath10k_wmi_event_tdls_peer(struct ath10k *ar, struct sk_buff *skb)
 					GFP_ATOMIC
 					);
 		break;
+	default:
+		kfree(tb);
+		return;
 	}
 
 exit:
-- 
2.30.2