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staging: rtl8192u: Fix use after free in ieee80211_rx()

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[ Upstream commit bcc5e2dcf09089b337b76fc1a589f6ff95ca19ac ]

We cannot dereference the "skb" pointer after calling
ieee80211_monitor_rx(), because it is a use after free.

Fixes: 8fc8598e61 ("Staging: Added Realtek rtl8192u driver to staging")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/Y33BArx3k/aw6yv/@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2022-11-23 09:43:14 +03:00 committed by Greg Kroah-Hartman
parent c226717aa8
commit 288ada16a9
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
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@ -943,9 +943,11 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
#endif
if (ieee->iw_mode == IW_MODE_MONITOR) {
unsigned int len = skb->len;
ieee80211_monitor_rx(ieee, skb, rx_stats);
stats->rx_packets++;
stats->rx_bytes += skb->len;
stats->rx_bytes += len;
return 1;
}