================================================================== BUG: KCSAN: data-race in do_exit / futex_wait_queue_me write to 0xffff8880a6e40064 of 4 bytes by task 24813 on cpu 1: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] futex_wait_queue_me+0x1a8/0x250 kernel/futex.c:2588 futex_wait+0x145/0x390 kernel/futex.c:2690 do_futex+0x145c/0x21c0 kernel/futex.c:3749 __do_sys_futex kernel/futex.c:3810 [inline] __se_sys_futex+0x26d/0x330 kernel/futex.c:3778 __x64_sys_futex+0x74/0x80 kernel/futex.c:3778 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880a6e40064 of 4 bytes by task 24765 on cpu 0: find_alive_thread kernel/exit.c:493 [inline] find_new_reaper kernel/exit.c:542 [inline] forget_original_parent kernel/exit.c:617 [inline] exit_notify kernel/exit.c:650 [inline] do_exit+0x7e0/0x16c0 kernel/exit.c:826 do_group_exit+0xcb/0x180 kernel/exit.c:903 get_signal+0xe9f/0x1650 kernel/signal.c:2757 arch_do_signal+0x25/0x270 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:267 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 24765 Comm: syz-executor.3 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================