================================================================== BUG: KCSAN: data-race in futex_wait_queue_me / mm_update_next_owner write to 0xffff88800d18502c of 4 bytes by task 23415 on cpu 0: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] futex_wait_queue_me+0x186/0x250 kernel/futex.c:2606 futex_wait+0x145/0x3d0 kernel/futex.c:2708 do_futex+0x105d/0x1cc0 kernel/futex.c:3736 __do_sys_futex kernel/futex.c:3799 [inline] __se_sys_futex+0x2a8/0x390 kernel/futex.c:3765 __x64_sys_futex+0x74/0x80 kernel/futex.c:3765 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88800d18502c of 4 bytes by task 23418 on cpu 1: mm_update_next_owner+0x1d9/0x4e0 kernel/exit.c:388 exit_mm+0x337/0x430 kernel/exit.c:500 do_exit+0x41f/0x1690 kernel/exit.c:812 do_group_exit+0x17d/0x180 kernel/exit.c:922 __do_sys_exit_group+0xb/0x10 kernel/exit.c:933 __se_sys_exit_group+0x5/0x10 kernel/exit.c:931 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:931 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23418 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================