>>>>> "Chris" == Chris Evans <[EMAIL PROTECTED]> writes:
Chris> What's wrong with isalnum() ?
Hm, must admit that I wasn't 100% sure if that's in the kernel lib or an evil
gcc expands it inline to some static array lookup. Now I see that it's
already in the kernel. Do some of you also sometimes wonder why the kernel is
so big ;-) ?
OK, so let's go for the isalnum() version, and don't forget to
#include <linux/ctype.h>
above...
Torsten
For those who joined the program late here's the complete patch:
--- linux/kernel/kmod.c.orig Tue Sep 26 01:18:55 2000
+++ linux/kernel/kmod.c Mon Nov 13 19:09:11 2000
@@ -18,6 +18,7 @@
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/unistd.h>
+#include <linux/ctype.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -168,6 +169,19 @@
static atomic_t kmod_concurrent = ATOMIC_INIT(0);
#define MAX_KMOD_CONCURRENT 50 /* Completely arbitrary value - KAO */
static int kmod_loop_msg;
+ const char * p;
+
+ /* For security reasons ensure the requested name consists
+ * only of allowed characters. Especially whitespace and
+ * shell metacharacters might confuse modprobe.
+ */
+ for (p = module_name; *p; p++)
+ {
+ if (isalnum(*p) || *p == '_' || *p == '-')
+ continue;
+
+ return -EINVAL;
+ }
/* Don't allow request_module() before the root fs is mounted! */
if ( ! current->fs->root ) {
-
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