This is a note to let you know that I've just added the patch titled
mac80211: fix memory corruption in EAPOL handling
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mac80211-fix-memory-corruption-in-eapol-handling.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From davis@xxxxxxxxxxxx Thu Jul 15 13:54:04 2021
From: Davis Mosenkovs <davis@xxxxxxxxxxxx>
Date: Sat, 10 Jul 2021 21:37:10 +0300
Subject: mac80211: fix memory corruption in EAPOL handling
To: johannes@xxxxxxxxxxxxxxxx
Cc: linux-wireless@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, Davis Mosenkovs <davis@xxxxxxxxxxxx>
Message-ID: <20210710183710.5687-1-davis@xxxxxxxxxxxx>
From: Davis Mosenkovs <davis@xxxxxxxxxxxx>
Commit e3d4030498c3 ("mac80211: do not accept/forward invalid EAPOL
frames") uses skb_mac_header() before eth_type_trans() is called
leading to incorrect pointer, the pointer gets written to. This issue
has appeared during backporting to 4.4, 4.9 and 4.14.
Fixes: e3d4030498c3 ("mac80211: do not accept/forward invalid EAPOL frames")
Link: https://lore.kernel.org/r/CAHQn7pKcyC_jYmGyTcPCdk9xxATwW5QPNph=bsZV8d-HPwNsyA@xxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # 4.4.x
Signed-off-by: Davis Mosenkovs <davis@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/rx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2234,7 +2234,7 @@ ieee80211_deliver_skb(struct ieee80211_r
#endif
if (skb) {
- struct ethhdr *ehdr = (void *)skb_mac_header(skb);
+ struct ethhdr *ehdr = (struct ethhdr *)skb->data;
/* deliver to local stack */
skb->protocol = eth_type_trans(skb, dev);
Patches currently in stable-queue which might be from davis@xxxxxxxxxxxx are
queue-4.4/mac80211-fix-memory-corruption-in-eapol-handling.patch
