================================================================== BUG: KCSAN: data-race in do_nanosleep / mm_update_next_owner write to 0xffff888105ceb0ac of 4 bytes by task 1765 on cpu 0: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] do_nanosleep+0x121/0x3d0 kernel/time/hrtimer.c:1896 hrtimer_nanosleep+0xfa/0x1f0 kernel/time/hrtimer.c:1949 common_nsleep+0x69/0x80 kernel/time/posix-timers.c:1227 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline] __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline] __x64_sys_clock_nanosleep+0x1ee/0x220 kernel/time/posix-timers.c:1245 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888105ceb0ac of 4 bytes by task 11918 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+0xce/0x1a0 kernel/exit.c:923 get_signal+0xfc3/0x1610 kernel/signal.c:2818 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x109/0x190 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11918 Comm: syz-executor.0 Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================