On Tue, 2011-10-18 at 10:22 +0300, Dan Carpenter wrote: > On Tue, Oct 18, 2011 at 08:54:47AM +0200, Johannes Berg wrote: > > On Tue, 2011-10-18 at 09:47 +0300, Dan Carpenter wrote: > > > Wifi drivers can have up to 6 keys but the rndis_wlan only has 4 so > > > it needs to have its own checks to make sure we don't go out of > > > bounds. The add_key() function already checks but I added some > > > checks to del_key() and set_default_key(). > > > > Semantically, that shouldn't be possible unless it advertises support > > for WLAN_CIPHER_SUITE_AES_CMAC. Is there a bug in those checks? > > > > You know I'm a newbie at this networking... I obviously had no idea > about WLAN_CIPHER_SUITE_AES_CMAC until you mentioned it. I just > looked at the other implementations of del_key() etc and they checked > it. Monkey see, monkey do. > > My concern when I wrote this patch was places like __cfg80211_clear_ibss() > which just do: > > for (i = 0; i < 6; i++) > rdev->ops->del_key(wdev->wiphy, dev, i, false, NULL); > > That's what triggers the Smatch warning as well. But as I said, I'm > quite a newbie at this code. Ah ok, I didn't know they didn't check. That's reasonable, thanks! I was just thinking that we wouldn't have keys 4/5 w/o CMAC to start with, but it makes some sense that the code would just try to clear all keys. johannes -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
