================================================================== BUG: KCSAN: data-race in do_signal_stop / do_signal_stop write to 0xffff8881518d106c of 4 bytes by task 22999 on cpu 0: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] do_signal_stop+0x591/0x710 kernel/signal.c:2448 get_signal+0xa16/0x1610 kernel/signal.c:2787 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 read to 0xffff8881518d106c of 4 bytes by task 23010 on cpu 1: task_set_jobctl_pending kernel/signal.c:289 [inline] do_signal_stop+0x33e/0x710 kernel/signal.c:2407 get_signal+0xa16/0x1610 kernel/signal.c:2787 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 value changed: 0x40404040 -> 0x00404040 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23010 Comm: syz-executor.4 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================