================================================================== BUG: KCSAN: data-race in do_nanosleep / mm_update_next_owner read to 0xffff88811dcb70e4 of 4 bytes by task 8687 on cpu 1: mm_update_next_owner+0x29f/0x460 kernel/exit.c:389 exit_mm kernel/exit.c:484 [inline] do_exit+0x4c1/0x18f0 kernel/exit.c:804 do_group_exit+0xb4/0x1c0 kernel/exit.c:921 get_signal+0x2a2/0x1320 kernel/signal.c:2734 do_signal+0x2f/0x6c0 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x250/0x2c0 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x353/0x370 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88811dcb70e4 of 4 bytes by task 7629 on cpu 0: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] do_nanosleep+0x127/0x320 kernel/time/hrtimer.c:1871 hrtimer_nanosleep+0x191/0x320 kernel/time/hrtimer.c:1924 __do_sys_nanosleep kernel/time/hrtimer.c:1958 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1945 [inline] __x64_sys_nanosleep+0x106/0x150 kernel/time/hrtimer.c:1945 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7629 Comm: syz-executor.2 Not tainted 5.4.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================