iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mac80211: fix memory corruption in EAPOL handling

Browse Source 
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@mail.gmail.com
Cc: <stable@vger.kernel.org> # 4.4.x
Signed-off-by: Davis Mosenkovs <davis@mosenkovs.lv>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Davis Mosenkovs 2021-07-10 21:37:10 +03:00 committed by Greg Kroah-Hartman
parent 545914a9f9
commit 54ec4c414c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/mac80211/rx.c
View File

@ -2380,7 +2380,7 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
#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);