Hi all,
On Fri, 31 Mar 2023 10:49:59 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
>
> 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,
This is now a conflict between the net-next and net trees.
--
Cheers,
Stephen Rothwell
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