linux-kernel - [PATCH 5/5] staging: r8188eu: use offsetof for ie start offset

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Date:   Sun, 24 Jul 2022 17:39:17 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH 5/5] staging: r8188eu: use offsetof for ie start offset

Use offsetof to calculate the start offset of the information elements in
an association response message.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 25e47efa5b9c..37c90d9e66bf 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1307,7 +1307,7 @@ unsigned int OnAssocRsp(struct adapter *padapter, struct recv_frame *precv_frame
 	/* following are moved to join event callback function */
 	/* to handle HT, WMM, rate adaptive, update MAC reg */
 	/* for not to handle the synchronous IO in the tasklet */
-	for (i = (6 + WLAN_HDR_A3_LEN); i < pkt_len;) {
+	for (i = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); i < pkt_len;) {
 		pIE = (struct ndis_802_11_var_ie *)(pframe + i);
 
 		switch (pIE->ElementID) {
-- 
2.30.2