uvm_map_protect() grabs the vm_map lock and do not require the
KERNEL_LOCK().

ok?

Index: kern/kern_resource.c
===================================================================
RCS file: /cvs/src/sys/kern/kern_resource.c,v
diff -u -p -r1.95 kern_resource.c
--- kern/kern_resource.c	31 May 2025 12:40:33 -0000	1.95
+++ kern/kern_resource.c	15 Aug 2025 07:58:14 -0000
@@ -328,10 +328,8 @@ dosetrlimit(struct proc *p, u_int which,
 			}
 			addr = trunc_page(addr);
 			size = round_page(size);
-			KERNEL_LOCK();
 			(void) uvm_map_protect(&vm->vm_map, addr,
 			    addr+size, prot, UVM_ET_STACK, FALSE, FALSE);
-			KERNEL_UNLOCK();
 		}
 	}