=====================================================
BUG: KMSAN: uninit-value in complete+0x11d/0x150 kernel/sched/completion.c:34
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: mm_percpu_wq wq_barrier_func
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:200
 complete+0x11d/0x150 kernel/sched/completion.c:34
 wq_barrier_func+0x3b/0x50 kernel/workqueue.c:2630
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0x18bc/0x2340 kernel/workqueue.c:2427
 kthread+0x521/0x560 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Local variable ----barr@__flush_work created at:
 __flush_work+0x59/0x1020 kernel/workqueue.c:3039
 __flush_work+0x59/0x1020 kernel/workqueue.c:3039
=====================================================
Kernel panic - not syncing: panic_on_kmsan set ...
CPU: 0 PID: 5 Comm: kworker/0:0 Tainted: G    B             5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: mm_percpu_wq wq_barrier_func
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 panic+0x4c6/0xea7 kernel/panic.c:231
 kmsan_report+0x1de/0x1e0 mm/kmsan/kmsan_report.c:144
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:200
 complete+0x11d/0x150 kernel/sched/completion.c:34
 wq_barrier_func+0x3b/0x50 kernel/workqueue.c:2630
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0x18bc/0x2340 kernel/workqueue.c:2427
 kthread+0x521/0x560 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Kernel Offset: disabled
Rebooting in 86400 seconds..