batman-adv: update to version 2026.2

* support latest kernels (5.10 - 7.2)
* coding style cleanups and refactoring
* switch wifi flags lookup to specialized rhashtable
* skip unnecessary TVLV buffer allocation of each OGM(v2) transmission
* bugs squashed:
  - batman_iv: stop caching unowned originator pointers
  - batman_iv: fix integer overflow on buff_pos
  - batman_iv: avoid bonding logic for outgoing OGM
  - batman_iv: recover OGM scheduling after forward packet error
  - batman_v: stop OGMv2 on disabled interface
  - batman_v: prevent ELP transmission interval underflow
  - batman_v: prevent OGM aggregation on disabled hardif
  - bla: prevent use-after-free when deleting claims
  - bla: only purge non-released claims
  - bla: put backbone reference on failed claim hash insert
  - bla: fix report_work leak on backbone_gw purge
  - bla: avoid double decrement of bla.num_requests
  - bla: avoid NULL-ptr deref for claim via dropped interface
  - bla: annotate lasttime access with READ/WRITE_ONCE
  - bla: reacquire gw address after skb realloc
  - dat: acquire ARP hw source only after skb realloc
  - dat: ensure accessible eth_hdr proto field
  - dat: handle forward allocation error
  - dat: prevent false sharing between VLANs
  - frag: fix reassembly length accounting
  - frag: disallow unicast fragment in fragment
  - frag: ensure fragment is writable before modifying TTL
  - frag: avoid underflow of TTL
  - gw: acquire ethernet header only after skb realloc
  - gw: clear current gateway during teardown
  - gw: don't deselect gateway with active hardif
  - mcast: fix use-after-free in orig_node RCU release
  - routing: access unicast_ttvn skb->data only after skb realloc
  - routing: ensure bcast is writable before modifying TTL
  - routing: fix (m|b)cast csum after decrementing TTL
  - routing: retrieve ethhdr after potential skb realloc on RX
  - tp_meter: reject new sessions during teardown
  - tp_meter: stop sessions during mesh teardown
  - tp_meter: fix counter underflow during shutdown
  - tp_meter: fix tp_num leak on kmalloc failure
  - tp_meter: fix tp_vars reference leak in receiver shutdown
  - tp_meter: avoid use of uninit sender vars
  - tp_meter: directly shut down timer on cleanup
  - tp_meter: fix race condition in send error reporting
  - tp_meter: avoid role confusion in tp_list
  - tp_meter: keep unacked list in ascending ordered
  - tp_meter: initialize dup_acks explicitly
  - tp_meter: initialize dec_cwnd explicitly
  - tp_meter: avoid window underflow
  - tp_meter: avoid divide-by-zero for dec_cwnd
  - tp_meter: fix fast recovery precondition
  - tp_meter: handle seqno wrap-around for fast recovery detection
  - tp_meter: add only finished tp_vars to lists
  - tp_meter: use locking for all congestion control variables
  - tp_meter: initialize last_recv_time during init
  - tp_meter: restrict number of unacked list entries
  - tp_meter: annotate last_recv_time access with READ/WRITE_ONCE
  - tp_meter: prevent parallel modifications of last_recv
  - tp_meter: handle overlapping packets
  - tt: reject oversized local TVLV buffers
  - tt: fix negative tt_buff_len
  - tt: fix negative last_changeset_len
  - tt: fix TOCTOU race for reported vlans
  - tt: avoid empty VLAN responses
  - tt: prevent TVLV entry number overflow
  - tt: don't merge change entries with different VIDs
  - tt: track roam count per VID
  - tvlv: abort OGM send on tvlv append failure
  - tvlv: reject oversized TVLV packets
  - tvlv: avoid race of cifsnotfound handler state
  - tvlv: enforce 2-byte alignment

Signed-off-by: Sven Eckelmann <sven@narfation.org>

batman-adv/Makefile

@@ -3,12 +3,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=batman-adv
-PKG_VERSION:=2026.1
-PKG_RELEASE:=3
+PKG_VERSION:=2026.2
+PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://downloads.open-mesh.org/batman/releases/batman-adv-$(PKG_VERSION)
-PKG_HASH:=6487dd3b4ad0f85510dedbba335fe77b1b877d0e77393c51ddca07a7451b8f45
+PKG_HASH:=4e17fced2c80945e22609be87534481733ff1b5d17050de4e4f323c171418135
 PKG_EXTMOD_SUBDIRS:=net/batman-adv
 
 PKG_MAINTAINER:=Simon Wunderlich <sw@simonwunderlich.de>

batman-adv/patches/0001-fix-batadv_is_cfg80211_netdev.patch

@@ -7,7 +7,7 @@ macro to use when building under backports.
 
 --- a/net/batman-adv/hard-interface.c
 +++ b/net/batman-adv/hard-interface.c
-@@ -309,8 +309,7 @@ static bool batadv_is_cfg80211_netdev(st
+@@ -320,8 +320,7 @@ static bool batadv_is_cfg80211_netdev(st
  {
  	if (!net_device)
  		return false;