================================================================== BUG: KCSAN: data-race in free_pid / zap_pid_ns_processes read-write to 0xffff88811304a028 of 4 bytes by task 3967 on cpu 1: free_pid+0x80/0x170 kernel/pid.c:143 __change_pid+0x19a/0x1c0 kernel/pid.c:367 detach_pid+0x1c/0x30 kernel/pid.c:372 __unhash_process kernel/exit.c:132 [inline] __exit_signal kernel/exit.c:201 [inline] release_task+0x6e7/0xc10 kernel/exit.c:258 exit_notify kernel/exit.c:776 [inline] do_exit+0xf62/0x1720 kernel/exit.c:902 do_group_exit+0x102/0x150 kernel/exit.c:1031 get_signal+0xf2f/0x1080 kernel/signal.c:2917 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88811304a028 of 4 bytes by task 3259 on cpu 0: zap_pid_ns_processes+0x1f2/0x2c0 kernel/pid_namespace.c:250 find_child_reaper kernel/exit.c:612 [inline] forget_original_parent kernel/exit.c:701 [inline] exit_notify kernel/exit.c:738 [inline] do_exit+0x148c/0x1720 kernel/exit.c:902 do_group_exit+0x102/0x150 kernel/exit.c:1031 get_signal+0xf2f/0x1080 kernel/signal.c:2917 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000002 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3259 Comm: syz-executor Not tainted 6.11.0-rc2-syzkaller-00194-gafdab700f65e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ==================================================================