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Boot parameters prefixed with "sysctl." are processed during the final stage of system initialization via kernel_init()-> do_sysctl_args(). When CONFIG_MEM_ALLOC_PROFILING_DEBUG is enabled, the sysctl.vm.mem_profiling entry is not writable and will cause a warning. Before run_init_process(), system initialization executes in kernel thread context. Use current->mm to distinguish sysctl writes during do_sysctl_args() from user-space triggered ones. And when the proc_handler is from do_sysctl_args(), always return success because the same value was already set by setup_early_mem_profiling() and this eliminates a permission denied warning. Link: https://lkml.kernel.org/r/20260115031536.164254-1-ranxiaokai627@163.com Signed-off-by: Ran Xiaokai <ran.xiaokai@zte.com.cn> Suggested-by: Suren Baghdasaryan <surenb@google.com> Acked-by: Suren Baghdasaryan <surenb@google.com> Cc: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>