linux-kernel - linux-next: manual merge of the wireless-next tree with the wireless tree

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Date:   Fri, 31 Mar 2023 10:49:59 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Kalle Valo <kvalo@...nel.org>,
        Johannes Berg <johannes@...solutions.net>
Cc:     Wireless <linux-wireless@...r.kernel.org>,
        Felix Fietkau <nbd@....name>,
        Johannes Berg <johannes.berg@...el.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Ryder Lee <ryder.lee@...iatek.com>
Subject: linux-next: manual merge of the wireless-next tree with the
 wireless tree

Hi all,

Today's linux-next merge of the wireless-next tree got a conflict in:

  net/mac80211/rx.c

between commit:

  a16fc38315f2 ("wifi: mac80211: fix potential null pointer dereference")

from the wireless tree and commit:

  fe4a6d2db3ba ("wifi: mac80211: implement support for yet another mesh A-MSDU format")

from the wireless-next tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc net/mac80211/rx.c
index 3e2176a730e6,1c957194554b..000000000000
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@@ -2776,27 -2862,12 +2843,31 @@@ ieee80211_rx_mesh_data(struct ieee80211
  		rcu_read_unlock();
  	}
  
 +	/* Frame has reached destination.  Don't forward */
 +	if (ether_addr_equal(sdata->vif.addr, eth->h_dest))
 +		goto rx_accept;
 +
 +	if (!--mesh_hdr->ttl) {
 +		if (multicast)
 +			goto rx_accept;
 +
 +		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
 +		return RX_DROP_MONITOR;
 +	}
 +
 +	if (!ifmsh->mshcfg.dot11MeshForwarding) {
 +		if (is_multicast_ether_addr(eth->h_dest))
 +			goto rx_accept;
 +
 +		return RX_DROP_MONITOR;
 +	}
 +
  	skb_set_queue_mapping(skb, ieee802_1d_to_ac[skb->priority]);
  
+ 	if (!multicast &&
+ 	    ieee80211_rx_mesh_fast_forward(sdata, skb, mesh_hdrlen))
+ 		return RX_QUEUED;
+ 
  	ieee80211_fill_mesh_addresses(&hdr, &hdr.frame_control,
  				      eth->h_dest, eth->h_source);
  	hdrlen = ieee80211_hdrlen(hdr.frame_control);
@@@ -2914,14 -2982,24 +2985,24 @@@ __ieee80211_rx_h_amsdu(struct ieee80211
  					  data_offset, true))
  		return RX_DROP_UNUSABLE;
  
 -	if (rx->sta && rx->sta->amsdu_mesh_control < 0) {
 +	if (rx->sta->amsdu_mesh_control < 0) {
- 		bool valid_std = ieee80211_is_valid_amsdu(skb, true);
- 		bool valid_nonstd = ieee80211_is_valid_amsdu(skb, false);
+ 		s8 valid = -1;
+ 		int i;
+ 
+ 		for (i = 0; i <= 2; i++) {
+ 			if (!ieee80211_is_valid_amsdu(skb, i))
+ 				continue;
+ 
+ 			if (valid >= 0) {
+ 				/* ambiguous */
+ 				valid = -1;
+ 				break;
+ 			}
  
- 		if (valid_std && !valid_nonstd)
- 			rx->sta->amsdu_mesh_control = 1;
- 		else if (valid_nonstd && !valid_std)
- 			rx->sta->amsdu_mesh_control = 0;
+ 			valid = i;
+ 		}
+ 
+ 		rx->sta->amsdu_mesh_control = valid;
  	}
  
  	ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,

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