================================================================== BUG: KCSAN: data-race in futex_wait_queue_me / mm_update_next_owner write to 0xffff8880b78a8024 of 4 bytes by task 12266 on cpu 0: 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 0xffff8880b78a8024 of 4 bytes by task 12272 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+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:159 [inline] exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:190 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:265 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: 1 PID: 12272 Comm: syz-executor.1 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================