================================================================== BUG: KCSAN: data-race in batadv_hard_if_event / batadv_mcast_mla_update write to 0xffff888104033610 of 1 bytes by task 50 on cpu 1: batadv_hardif_remove_interface net/batman-adv/hard-interface.c:930 [inline] batadv_hard_if_event+0x896/0xfb0 net/batman-adv/hard-interface.c:988 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x6f/0x1d0 kernel/notifier.c:453 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2141 call_netdevice_notifiers_extack net/core/dev.c:2179 [inline] call_netdevice_notifiers net/core/dev.c:2193 [inline] unregister_netdevice_many_notify+0x98a/0x1280 net/core/dev.c:11788 unregister_netdevice_many net/core/dev.c:11852 [inline] default_device_exit_batch+0x5f0/0x650 net/core/dev.c:12337 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x4eb/0x890 net/core/net_namespace.c:652 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3317 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3398 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 read to 0xffff888104033610 of 1 bytes by task 11 on cpu 0: batadv_mcast_mla_forw_flags_get net/batman-adv/multicast.c:252 [inline] batadv_mcast_mla_flags_get net/batman-adv/multicast.c:289 [inline] __batadv_mcast_mla_update net/batman-adv/multicast.c:909 [inline] batadv_mcast_mla_update+0x21b/0x1700 net/batman-adv/multicast.c:948 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3317 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3398 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: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 11 Comm: kworker/u8:0 Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: bat_events batadv_mcast_mla_update ================================================================== smc: removing ib device sz1