[PATCH] Only disallow _setting_ of function key string

Mikael Pettersson <[e-mail]> noted that the current 2.6-git (and 2.4)
patch to disallow KDSKBSENT for unpriviledged users should be less restrictive
allowing reading of current function key string entry, but not writing.

Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/char/vt_ioctl.c

···
 	if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
 		return -EFAULT;
 
+	if (!capable(CAP_SYS_TTY_CONFIG))
+		perm = 0;
+
 	switch (cmd) {
 	case KDGKBENT:
 		key_map = key_maps[s];
···
 	int ret;
 
 	if (!capable(CAP_SYS_TTY_CONFIG))
-		return -EPERM;
+		perm = 0;
 
 	kbs = kmalloc(sizeof(*kbs), GFP_KERNEL);
 	if (!kbs) {