From 6aaf00d14e6c80f4664932d261be7a03834f558b Mon Sep 17 00:00:00 2001 From: Tiwei Bie Date: Mon, 27 Oct 2025 08:18:08 +0800 Subject: [PATCH] um: Do not disable kmalloc in initial_thread_cb() Currently, initial_thread_cb() temporarily disables kmalloc when it invokes the callback, allowing the callback to bypass kmalloc. This is unnecessary for the current users of initial_thread_cb(), and we should avoid memory allocations that are not under the control of the UML kernel. Therefore, let's stop temporarily disabling kmalloc in initial_thread_cb(). Signed-off-by: Tiwei Bie Link: https://patch.msgid.link/20251027001815.1666872-2-tiwei.bie@linux.dev Signed-off-by: Johannes Berg --- arch/um/kernel/process.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 13d461712c997..0a9249b2b86b1 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -187,11 +187,7 @@ int copy_thread(struct task_struct * p, const struct kernel_clone_args *args) void initial_thread_cb(void (*proc)(void *), void *arg) { - int save_kmalloc_ok = kmalloc_ok; - - kmalloc_ok = 0; initial_thread_cb_skas(proc, arg); - kmalloc_ok = save_kmalloc_ok; } int arch_dup_task_struct(struct task_struct *dst, -- 2.47.3