diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2023-08-15 18:09:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-23 11:11:03 +0200 |
| commit | 676a423410131d111a264d29aecbe6aadd57fb22 (patch) | |
| tree | 2a2db1d660d36cda95632ceaebe9d56b907cdd65 /net/wireless | |
| parent | 28b07e30bc1465fdc0d71919739310ec311abe42 (diff) | |
wifi: cfg80211: reject auth/assoc to AP with our address
[ Upstream commit 5d4e04bf3a0f098bd9033de3a5291810fa14c7a6 ]
If the AP uses our own address as its MLD address or BSSID, then
clearly something's wrong. Reject such connections so we don't
try and fail later.
Reported-by: syzbot+2676771ed06a6df166ad@syzkaller.appspotmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/mlme.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 581df7f4c524..e7fa0608341d 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -277,6 +277,11 @@ int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, ether_addr_equal(req->bss->bssid, wdev->u.client.connected_addr)) return -EALREADY; + if (ether_addr_equal(req->bss->bssid, dev->dev_addr) || + (req->link_id >= 0 && + ether_addr_equal(req->ap_mld_addr, dev->dev_addr))) + return -EINVAL; + return rdev_auth(rdev, dev, req); } @@ -331,6 +336,9 @@ int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, if (req->links[i].bss == req->links[j].bss) return -EINVAL; } + + if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr)) + return -EINVAL; } if (wdev->connected && @@ -338,6 +346,11 @@ int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid))) return -EALREADY; + if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) || + (req->link_id >= 0 && + ether_addr_equal(req->ap_mld_addr, dev->dev_addr))) + return -EINVAL; + cfg80211_oper_and_ht_capa(&req->ht_capa_mask, rdev->wiphy.ht_capa_mod_mask); cfg80211_oper_and_vht_capa(&req->vht_capa_mask, |