wifi: brcmfmac: cfg80211: Handle SSID based pmksa deletion

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From: Janne Grunau <j@xxxxxxxxxx>

commit 2ad4e1ada8eebafa2d75a4b75eeeca882de6ada1 upstream.

wpa_supplicant 2.11 sends since 1efdba5fdc2c ("Handle PMKSA flush in the
driver for SAE/OWE offload cases") SSID based PMKSA del commands.
brcmfmac is not prepared and tries to dereference the NULL bssid and
pmkid pointers in cfg80211_pmksa. PMKID_V3 operations support SSID based
updates so copy the SSID.

Fixes: a96202acaea4 ("wifi: brcmfmac: cfg80211: Add support for PMKID_V3 operations")
Cc: stable@xxxxxxxxxxxxxxx # 6.4.x
Signed-off-by: Janne Grunau <j@xxxxxxxxxx>
Reviewed-by: Neal Gompa <neal@xxxxxxxxx>
Acked-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxx>
Link: https://patch.msgid.link/20240803-brcmfmac_pmksa_del_ssid-v1-1-4e85f19135e1@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c |   13 +++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -4321,9 +4321,16 @@ brcmf_pmksa_v3_op(struct brcmf_if *ifp,
 		/* Single PMK operation */
 		pmk_op->count = cpu_to_le16(1);
 		length += sizeof(struct brcmf_pmksa_v3);
-		memcpy(pmk_op->pmk[0].bssid, pmksa->bssid, ETH_ALEN);
-		memcpy(pmk_op->pmk[0].pmkid, pmksa->pmkid, WLAN_PMKID_LEN);
-		pmk_op->pmk[0].pmkid_len = WLAN_PMKID_LEN;
+		if (pmksa->bssid)
+			memcpy(pmk_op->pmk[0].bssid, pmksa->bssid, ETH_ALEN);
+		if (pmksa->pmkid) {
+			memcpy(pmk_op->pmk[0].pmkid, pmksa->pmkid, WLAN_PMKID_LEN);
+			pmk_op->pmk[0].pmkid_len = WLAN_PMKID_LEN;
+		}
+		if (pmksa->ssid && pmksa->ssid_len) {
+			memcpy(pmk_op->pmk[0].ssid.SSID, pmksa->ssid, pmksa->ssid_len);
+			pmk_op->pmk[0].ssid.SSID_len = pmksa->ssid_len;
+		}
 		pmk_op->pmk[0].time_left = cpu_to_le32(alive ? BRCMF_PMKSA_NO_EXPIRY : 0);
 	}
 


Patches currently in stable-queue which might be from j@xxxxxxxxxx are

queue-6.6/wifi-brcmfmac-cfg80211-handle-ssid-based-pmksa-deletion.patch




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