diff mbox series

[v2] wifi: use struct_group to copy addresses

Message ID 20220829114637.52b97c17ebec.I7c75a7d3599f120c720a5d6ec170fd90ec0dfd51@changeid
State New
Headers show
Series [v2] wifi: use struct_group to copy addresses | expand

Commit Message

Johannes Berg Aug. 29, 2022, 9:46 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

We sometimes copy all the addresses from the 802.11 header
for the AAD, which may cause complaints from fortify checks.
Use struct_group() to enable that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 include/linux/ieee80211.h          | 8 +++++---
 net/mac80211/wpa.c                 | 4 ++--
 net/wireless/lib80211_crypt_ccmp.c | 2 +-
 3 files changed, 8 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 55e6f4ad0ca6..b6e6d5b40774 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -310,9 +310,11 @@  static inline u16 ieee80211_sn_sub(u16 sn1, u16 sn2)
 struct ieee80211_hdr {
 	__le16 frame_control;
 	__le16 duration_id;
-	u8 addr1[ETH_ALEN];
-	u8 addr2[ETH_ALEN];
-	u8 addr3[ETH_ALEN];
+	struct_group(addrs,
+		u8 addr1[ETH_ALEN];
+		u8 addr2[ETH_ALEN];
+		u8 addr3[ETH_ALEN];
+	);
 	__le16 seq_ctrl;
 	u8 addr4[ETH_ALEN];
 } __packed __aligned(2);
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 93ec2f349748..20f742b5503b 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -351,7 +351,7 @@  static u8 ccmp_gcmp_aad(struct sk_buff *skb, u8 *aad)
 	 * FC | A1 | A2 | A3 | SC | [A4] | [QC] */
 	put_unaligned_be16(len_a, &aad[0]);
 	put_unaligned(mask_fc, (__le16 *)&aad[2]);
-	memcpy(&aad[4], &hdr->addr1, 3 * ETH_ALEN);
+	memcpy(&aad[4], &hdr->addrs, 3 * ETH_ALEN);
 
 	/* Mask Seq#, leave Frag# */
 	aad[22] = *((u8 *) &hdr->seq_ctrl) & 0x0f;
@@ -792,7 +792,7 @@  static void bip_aad(struct sk_buff *skb, u8 *aad)
 				IEEE80211_FCTL_MOREDATA);
 	put_unaligned(mask_fc, (__le16 *) &aad[0]);
 	/* A1 || A2 || A3 */
-	memcpy(aad + 2, &hdr->addr1, 3 * ETH_ALEN);
+	memcpy(aad + 2, &hdr->addrs, 3 * ETH_ALEN);
 }
 
 
diff --git a/net/wireless/lib80211_crypt_ccmp.c b/net/wireless/lib80211_crypt_ccmp.c
index 6a5f08f7491e..cca5e1cf089e 100644
--- a/net/wireless/lib80211_crypt_ccmp.c
+++ b/net/wireless/lib80211_crypt_ccmp.c
@@ -136,7 +136,7 @@  static int ccmp_init_iv_and_aad(const struct ieee80211_hdr *hdr,
 	pos = (u8 *) hdr;
 	aad[0] = pos[0] & 0x8f;
 	aad[1] = pos[1] & 0xc7;
-	memcpy(aad + 2, hdr->addr1, 3 * ETH_ALEN);
+	memcpy(aad + 2, &hdr->addrs, 3 * ETH_ALEN);
 	pos = (u8 *) & hdr->seq_ctrl;
 	aad[20] = pos[0] & 0x0f;
 	aad[21] = 0;		/* all bits masked */