From d30f4436f364b4ad915ca2c09be07cd0f93ceb44 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Wed, 23 Nov 2022 16:12:53 +0800
Subject: [PATCH] staging: rtl8192e: Fix potential use-after-free in rtllib_rx_Monitor()
Git-commit: d30f4436f364b4ad915ca2c09be07cd0f93ceb44
Patch-mainline: v6.2-rc1
References: git-fixes
The skb is delivered to netif_rx() in rtllib_monitor_rx(), which may free it,
after calling this, dereferencing skb may trigger use-after-free.
Found by Smatch.
Fixes: 94a799425eee ("From: wlanfae <wlanfae@realtek.com> [PATCH 1/8] rtl8192e: Import new version of driver from realtek")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221123081253.22296-1-yuehaibing@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/staging/rtl8192e/rtllib_rx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/rtl8192e/rtllib_rx.c b/drivers/staging/rtl8192e/rtllib_rx.c
index 6a0f5bbb99ef..f8965afab767 100644
--- a/drivers/staging/rtl8192e/rtllib_rx.c
+++ b/drivers/staging/rtl8192e/rtllib_rx.c
@@ -1489,9 +1489,9 @@ static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
hdrlen += 4;
}
- rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
ieee->stats.rx_packets++;
ieee->stats.rx_bytes += skb->len;
+ rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
return 1;
}
--
2.35.3