Commit 47caf685 authored by Johannes Berg's avatar Johannes Berg
Browse files

cfg80211: regulatory: reject invalid hints 



Reject invalid hints early in order to not cause a kernel
WARN later if they're restored to or similar.

Reported-by: default avatar <syzbot+d451401ffd00a60677ee@syzkaller.appspotmail.com>
Link: https://syzkaller.appspot.com/bug?extid=d451401ffd00a60677ee
Link: https://lore.kernel.org/r/20200819084648.13956-1-johannes@sipsolutions.net


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 35799944

net/wireless/reg.c

+3 −0
Original line number Diff line number Diff line
@@ -2946,6 +2946,9 @@ int regulatory_hint_user(const char *alpha2, 
	if (WARN_ON(!alpha2))

		return -EINVAL;



	if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))

		return -EINVAL;



	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);

	if (!request)

		return -ENOMEM;