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BUG: KCSAN: data-race in batadv_tt_local_add / batadv_tt_local_add

write to 0xffff888112e71b40 of 8 bytes by task 5952 on cpu 1:
 batadv_tt_local_add+0x162/0x1010 net/batman-adv/translation-table.c:619
 batadv_interface_tx+0x411/0xb30 net/batman-adv/soft-interface.c:249
 __netdev_start_xmit include/linux/netdevice.h:5151 [inline]
 netdev_start_xmit include/linux/netdevice.h:5160 [inline]
 xmit_one net/core/dev.c:3800 [inline]
 dev_hard_start_xmit+0x119/0x3f0 net/core/dev.c:3816
 __dev_queue_xmit+0x100a/0x2090 net/core/dev.c:4652
 dev_queue_xmit include/linux/netdevice.h:3313 [inline]
 neigh_resolve_output+0x3ea/0x460 net/core/neighbour.c:1514
 neigh_output include/net/neighbour.h:539 [inline]
 ip6_finish_output2+0xa07/0xd60 net/ipv6/ip6_output.c:141
 ip6_finish_output+0x438/0x540 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0xf5/0x230 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:459 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ndisc_send_skb+0x4d8/0x6f0 net/ipv6/ndisc.c:513
 ndisc_send_ns+0x79/0xe0 net/ipv6/ndisc.c:671
 addrconf_dad_work+0x702/0xbe0 net/ipv6/addrconf.c:4278
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4db/0xa20 kernel/workqueue.c:3319
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3400
 kthread+0x4ae/0x520 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

write to 0xffff888112e71b40 of 8 bytes by task 1037 on cpu 0:
 batadv_tt_local_add+0x162/0x1010 net/batman-adv/translation-table.c:619
 batadv_interface_tx+0x411/0xb30 net/batman-adv/soft-interface.c:249
 __netdev_start_xmit include/linux/netdevice.h:5151 [inline]
 netdev_start_xmit include/linux/netdevice.h:5160 [inline]
 xmit_one net/core/dev.c:3800 [inline]
 dev_hard_start_xmit+0x119/0x3f0 net/core/dev.c:3816
 __dev_queue_xmit+0x100a/0x2090 net/core/dev.c:4652
 dev_queue_xmit include/linux/netdevice.h:3313 [inline]
 neigh_resolve_output+0x3ea/0x460 net/core/neighbour.c:1514
 neigh_output include/net/neighbour.h:539 [inline]
 ip6_finish_output2+0xa07/0xd60 net/ipv6/ip6_output.c:141
 ip6_finish_output+0x438/0x540 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0xf5/0x230 net/ipv6/ip6_output.c:247
 dst_output include/net/dst.h:459 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 mld_sendpack+0x421/0x6d0 net/ipv6/mcast.c:1868
 mld_send_cr net/ipv6/mcast.c:2169 [inline]
 mld_ifc_work+0x51a/0x7e0 net/ipv6/mcast.c:2702
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4db/0xa20 kernel/workqueue.c:3319
 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3400
 kthread+0x4ae/0x520 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x00000000ffffe48f -> 0x00000000ffffe496

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 1037 Comm: kworker/0:2 Tainted: G        W          6.14.0-rc7-syzkaller-00179-gb3ee1e460951 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: mld mld_ifc_work
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