================================================================== BUG: KCSAN: data-race in get_signal / ptrace_check_attach write to 0xffff8881306c8558 of 8 bytes by task 6388 on cpu 0: ptrace_signal kernel/signal.c:2490 [inline] get_signal+0xb98/0x15d0 kernel/signal.c:2669 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+0x104/0x170 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+0x40/0x50 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881306c8558 of 8 bytes by task 6389 on cpu 1: ptrace_freeze_traced kernel/ptrace.c:178 [inline] ptrace_check_attach+0x144/0x250 kernel/ptrace.c:247 __do_sys_ptrace kernel/ptrace.c:1266 [inline] __se_sys_ptrace+0xd8/0x1b0 kernel/ptrace.c:1236 __x64_sys_ptrace+0x51/0x60 kernel/ptrace.c:1236 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 6389 Comm: syz-executor.3 Not tainted 5.12.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================