================================================================== BUG: KCSAN: data-race in futex_wait_queue_me / ptrace_attach read-write to 0xffff88801bd5002c of 4 bytes by task 2329 on cpu 0: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] futex_wait_queue_me+0x198/0x240 kernel/futex.c:2602 futex_wait+0x145/0x3d0 kernel/futex.c:2704 do_futex+0x105a/0x20c0 kernel/futex.c:3763 __do_sys_futex kernel/futex.c:3826 [inline] __se_sys_futex+0x2a8/0x390 kernel/futex.c:3792 __x64_sys_futex+0x74/0x80 kernel/futex.c:3792 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88801bd5002c of 4 bytes by task 2326 on cpu 1: ptrace_attach+0xd0/0x4b0 kernel/ptrace.c:378 __do_sys_ptrace kernel/ptrace.c:1256 [inline] __se_sys_ptrace+0xc1/0x2e0 kernel/ptrace.c:1236 __x64_sys_ptrace+0x51/0x60 kernel/ptrace.c:1236 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2326 Comm: syz-executor.0 Not tainted 5.11.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================