================================================================== BUG: KCSAN: data-race in alloc_pid / copy_process read-write to 0xffffffff86e5c328 of 4 bytes by task 30 on cpu 0: alloc_pid+0x6da/0x960 kernel/pid.c:334 copy_process+0x11cb/0x2340 kernel/fork.c:2329 kernel_clone+0x1c0/0x5f0 kernel/fork.c:2772 user_mode_thread+0xab/0xe0 kernel/fork.c:2849 call_usermodehelper_exec_sync kernel/umh.c:130 [inline] call_usermodehelper_exec_work+0x7a/0x160 kernel/umh.c:161 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3470 worker_thread+0x569/0x750 kernel/workqueue.c:3551 kthread+0x223/0x270 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read to 0xffffffff86e5c328 of 4 bytes by task 362 on cpu 1: copy_process+0x1acf/0x2340 kernel/fork.c:2492 kernel_clone+0x1c0/0x5f0 kernel/fork.c:2772 user_mode_thread+0xab/0xe0 kernel/fork.c:2849 call_usermodehelper_exec_sync kernel/umh.c:130 [inline] call_usermodehelper_exec_work+0x7a/0x160 kernel/umh.c:161 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0x56a/0xa50 kernel/workqueue.c:3470 worker_thread+0x569/0x750 kernel/workqueue.c:3551 kthread+0x223/0x270 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x800000cd -> 0x800000ce Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 362 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound call_usermodehelper_exec_work ================================================================== netdevsim netdevsim3 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim3 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim2 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim1 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0