This patch changes the permissions of the procfs entry kallsyms, thus, non-root users are restricted from accessing it. It's also available at: http://pearls.tuxedo-es.org/patches/security/proc-privacy-1_kernel_kallsyms.c.patch -- Lorenzo Hernández García-Hierro <[email protected]> [1024D/6F2B2DEC] & [2048g/9AE91A22][http://tuxedo-es.org]
diff -puN kernel/kallsyms.c~proc-privacy-1 kernel/kallsyms.c
--- linux-2.6.11/kernel/kallsyms.c~proc-privacy-1 2005-04-17 18:06:01.380119984 +0200
+++ linux-2.6.11-lorenzo/kernel/kallsyms.c 2005-04-17 18:06:27.378167680 +0200
@@ -388,7 +388,7 @@ int __init kallsyms_init(void)
{
struct proc_dir_entry *entry;
- entry = create_proc_entry("kallsyms", 0444, NULL);
+ entry = create_proc_entry("kallsyms", S_IFREG | S_IRUSR, NULL);
if (entry)
entry->proc_fops = &kallsyms_operations;
return 0;
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