================================================================== BUG: KCSAN: data-race in futex_wait_queue_me / mm_update_next_owner write to 0xffff88812d4820ac of 4 bytes by task 20898 on cpu 0: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] futex_wait_queue_me+0x1ba/0x260 kernel/futex.c:2606 futex_wait+0x143/0x430 kernel/futex.c:2708 do_futex+0x9d8/0x1ee0 kernel/futex.c:3732 __do_sys_futex kernel/futex.c:3805 [inline] __se_sys_futex+0x21c/0x380 kernel/futex.c:3786 __x64_sys_futex+0x74/0x80 kernel/futex.c:3786 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88812d4820ac of 4 bytes by task 20900 on cpu 1: mm_update_next_owner+0x1d9/0x520 kernel/exit.c:389 exit_mm+0x358/0x450 kernel/exit.c:501 do_exit+0x3ff/0x1560 kernel/exit.c:813 do_group_exit+0x19b/0x1a0 kernel/exit.c:923 __do_sys_exit_group+0xb/0x10 kernel/exit.c:934 __se_sys_exit_group+0x5/0x10 kernel/exit.c:932 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:932 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x40404040 -> 0x00404040 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 20900 Comm: syz-executor.0 Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================