=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 __flush_smp_call_function_queue+0x343/0x1810 kernel/smp.c:549
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:477
 __sysvec_call_function_single+0x48/0x350 arch/x86/kernel/smp.c:272
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:267 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:267
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 smap_save mm/kmsan/instrumentation.c:93 [inline]
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:35 [inline]
 __msan_metadata_ptr_for_load_4+0x11/0x40 mm/kmsan/instrumentation.c:93
 rcu_preempt_read_enter kernel/rcu/tree_plugin.h:391 [inline]
 __rcu_read_lock+0x32/0x70 kernel/rcu/tree_plugin.h:414
 rcu_read_lock include/linux/rcupdate.h:836 [inline]
 batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:767 [inline]
 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:848 [inline]
 batadv_iv_ogm_schedule+0x6fe/0x1860 net/batman-adv/bat_iv_ogm.c:904
 batadv_iv_send_outstanding_bat_ogm_packet+0xc73/0xdf0 net/batman-adv/bat_iv_ogm.c:1793
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3397
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3478
 kthread+0x53a/0x5f0 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable barr created at:
 __flush_work+0x42/0x1030 kernel/workqueue.c:4322
 __cancel_work_sync kernel/workqueue.c:4486 [inline]
 cancel_delayed_work_sync+0x12b/0x190 kernel/workqueue.c:4560

CPU: 0 UID: 0 PID: 13738 Comm: kworker/u8:13 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
=====================================================