================================================================== BUG: KCSAN: data-race in do_notify_parent_cldstop / wait_consider_task write to 0xffff88812630f548 of 4 bytes by task 11434 on cpu 0: wait_task_stopped kernel/exit.c:1185 [inline] wait_consider_task+0xb84/0x19e0 kernel/exit.c:1371 ptrace_do_wait kernel/exit.c:1411 [inline] do_wait+0x224/0x4a0 kernel/exit.c:1472 kernel_wait4+0x13c/0x1a0 kernel/exit.c:1630 __do_sys_wait4 kernel/exit.c:1658 [inline] __se_sys_wait4 kernel/exit.c:1654 [inline] __x64_sys_wait4+0x7a/0x100 kernel/exit.c:1654 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88812630f548 of 4 bytes by task 11427 on cpu 1: do_notify_parent_cldstop+0x1a3/0x280 kernel/signal.c:2058 ptrace_stop+0x2e2/0x670 kernel/signal.c:2202 ptrace_signal kernel/signal.c:2491 [inline] get_signal+0xbb3/0x15d0 kernel/signal.c:2669 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x104/0x170 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x40/0x50 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11427 Comm: syz-executor.0 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================