==================================================================
BUG: KCSAN: data-race in cleanup_net / synchronize_net

write to 0xffffffff88ff4318 of 8 bytes by task 37 on cpu 1:
 cleanup_net+0x6a/0x8a0 net/core/net_namespace.c:603
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4de/0xa20 kernel/workqueue.c:3319
 worker_thread+0x52c/0x710 kernel/workqueue.c:3400
 kthread+0x4b7/0x540 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffffffff88ff4318 of 8 bytes by task 1928 on cpu 0:
 from_cleanup_net net/core/dev.c:10408 [inline]
 synchronize_net+0x24/0x70 net/core/dev.c:11831
 dev_deactivate_many+0x44d/0x740 net/sched/sch_generic.c:1372
 dev_deactivate+0x9f/0x110 net/sched/sch_generic.c:1398
 linkwatch_do_dev+0xb1/0xf0 net/core/link_watch.c:184
 __linkwatch_run_queue+0x3c0/0x670 net/core/link_watch.c:244
 linkwatch_event+0x40/0x50 net/core/link_watch.c:304
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4de/0xa20 kernel/workqueue.c:3319
 worker_thread+0x52c/0x710 kernel/workqueue.c:3400
 kthread+0x4b7/0x540 kernel/kthread.c:464
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x0000000000000000 -> 0xffff8881003ac200

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 1928 Comm: kworker/u8:7 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound linkwatch_event
==================================================================
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered forwarding state