================================================================== BUG: KCSAN: data-race in futex_wait_queue_me / mm_update_next_owner write to 0xffff8880a4ce9024 of 4 bytes by task 20755 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: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 0xffff8880a4ce9024 of 4 bytes by task 20757 on cpu 1: mm_update_next_owner+0x1d9/0x4a0 kernel/exit.c:387 exit_mm+0x2c0/0x330 kernel/exit.c:482 do_exit+0x40f/0x16c0 kernel/exit.c:793 do_group_exit+0x17a/0x180 kernel/exit.c:903 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912 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: 20757 Comm: syz-executor.5 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================