[SRU][Cosmic][PATCH 1/1] rtlwifi: Fix leak of skb when processing C2H_BT_INFO

Connor Kuehl connor.kuehl at canonical.com
Mon Jul 1 22:16:15 UTC 2019

From: Larry Finger <Larry.Finger at lwfinger.net>

BugLink: https://bugs.launchpad.net/bugs/1831751

With commit 0a9f8f0a1ba9 ("rtlwifi: fix btmpinfo timeout while processing
C2H_BT_INFO"), calling rtl_c2hcmd_enqueue() with rtl_c2h_fast_cmd() true,
the routine returns without freeing that skb, thereby leaking it.

This issue has been discussed at https://github.com/lwfinger/rtlwifi_new/issues/401
and the fix tested there.

Fixes: 0a9f8f0a1ba9 ("rtlwifi: fix btmpinfo timeout while processing C2H_BT_INFO")
Reported-and-tested-by: Francisco Machado Magalhães Neto <franmagneto at gmail.com>
Cc: Francisco Machado Magalhães Neto <franmagneto at gmail.com>
Cc: Ping-Ke Shih <pkshih at realtek.com>
Cc: Stable <stable at vger.kernel.org> # 4.18+
Signed-off-by: Larry Finger <Larry.Finger at lwfinger.net>
Signed-off-by: Kalle Valo <kvalo at codeaurora.org>
(cherry picked from commit 8cfa272b0d321160ebb5b45073e39ef0a6ad73f2)
Signed-off-by: Connor Kuehl <connor.kuehl at canonical.com>
 drivers/net/wireless/realtek/rtlwifi/base.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c
index 54c9f6ab0c8c..a46bcf676e42 100644
--- a/drivers/net/wireless/realtek/rtlwifi/base.c
+++ b/drivers/net/wireless/realtek/rtlwifi/base.c
@@ -2289,6 +2289,7 @@ void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb)
 	if (rtl_c2h_fast_cmd(hw, skb)) {
 		rtl_c2h_content_parsing(hw, skb);
+		kfree_skb(skb);

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