parisc: Hide virtual kernel memory layout

For security reasons do not expose the virtual kernel memory layout to userspace. Signed-off-by: Helge Deller <[email protected]> Suggested-by: Kees Cook <[email protected]> Cc: [email protected] # 4.15 Reviewed-by: Kees Cook <[email protected]>
imcsk8 · Mar 2, 2018 · fd8d0ca · fd8d0ca
1 parent 0adb24e
commit fd8d0ca
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
@@ -629,7 +629,12 @@ void __init mem_init(void)
 #endif
 
 	mem_init_print_info(NULL);
-#ifdef CONFIG_DEBUG_KERNEL /* double-sanity-check paranoia */
+
+#if 0
+	/*
+	 * Do not expose the virtual kernel memory layout to userspace.
+	 * But keep code for debugging purposes.
+	 */
 	printk("virtual kernel memory layout:\n"
 	       "    vmalloc : 0x%px - 0x%px   (%4ld MB)\n"
 	       "    memory  : 0x%px - 0x%px   (%4ld MB)\n"