On Tue Mar 26, 2024 at 3:31 AM EET, Jarkko Sakkinen wrote:

quoted

quoted

+#endif /* _LINUX_EXECMEM_H */

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9d9095e81792..87fd8c14a938 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c

@@ -44,6 +44,7 @@
 #include <asm/cacheflush.h>
 #include <asm/errno.h>
 #include <linux/uaccess.h>
+#include <linux/execmem.h>
 
 #define KPROBE_HASH_BITS 6
 #define KPROBE_TABLE_SIZE (1 << KPROBE_HASH_BITS)

@@ -113,17 +114,17 @@ enum kprobe_slot_state {
 void __weak *alloc_insn_page(void)
 {
 	/*
-	 * Use module_alloc() so this page is within +/- 2GB of where the
+	 * Use alloc_execmem() so this page is within +/- 2GB of where the
 	 * kernel image and loaded module images reside. This is required
 	 * for most of the architectures.
 	 * (e.g. x86-64 needs this to handle the %rip-relative fixups.)
 	 */
-	return module_alloc(PAGE_SIZE);
+	return alloc_execmem(PAGE_SIZE, GFP_KERNEL);
 }
 
 static void free_insn_page(void *page)
 {
-	module_memfree(page);
+	free_execmem(page);
 }
 
 struct kprobe_insn_cache kprobe_insn_slots = {

@@ -1580,6 +1581,7 @@ static int check_kprobe_address_safe(struct kprobe *p,
 		goto out;
 	}
 
+#ifdef CONFIG_MODULES

You don't need this block, because these APIs have dummy functions.

Hmm... I'll verify this tomorrow.

It depends on having struct module available given "(*probed_mod)->state".

It is non-existent unless CONFIG_MODULES is set given how things are
flagged in include/linux/module.h.

BR, Jarkko