wifi: mac80211: remove misleading j_0 construction parts

The GCM algorithm implementation in the kernel assumes that a 12-byte IV is passed, not the actual J_0 from the GCM spec. Don't rename, that'd be messy, but also don't fill the bytes beyond the IV that aren't used, since otherwise it looks as though j_0[12] is used uninitialized. Link: https://patch.msgid.link/20241021151414.798ceb7a5896.Ic57751edad228d56865ecf7433fef469e5e0a4aa@changeid Signed-off-by: Johannes Berg <[email protected]>
omasanori · Oct 23, 2024 · b457d87 · b457d87
1 parent 6ee0270
commit b457d87
Showing 1 changed file with 0 additions and 3 deletions.
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
@@ -598,9 +598,6 @@ static void gcmp_special_blocks(struct sk_buff *skb, u8 *pn, u8 *j_0, u8 *aad,
 
 	memcpy(j_0, hdr->addr2, ETH_ALEN);
 	memcpy(&j_0[ETH_ALEN], pn, IEEE80211_GCMP_PN_LEN);
-	j_0[13] = 0;
-	j_0[14] = 0;
-	j_0[AES_BLOCK_SIZE - 1] = 0x01;
 
 	ccmp_gcmp_aad(skb, aad, spp_amsdu);
 }