From: Tiwei Bie Date: Mon, 27 Oct 2025 00:18:08 +0000 (+0800) Subject: um: Do not disable kmalloc in initial_thread_cb() X-Git-Tag: v6.19-rc1~104^2~21 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6aaf00d14e6c80f4664932d261be7a03834f558b;p=thirdparty%2Fkernel%2Flinux.git 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 --- 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,