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authorJohannes Berg <johannes.berg@intel.com>2020-08-19 10:46:48 +0200
committerJohannes Berg <johannes.berg@intel.com>2020-08-27 10:53:14 +0200
commit47caf685a6854593348f216e0b489b71c10cbe03 (patch)
treedc18ccb244f50e1495fadf4ca93bbecd0e760a88 /net/wireless/reg.c
parent3579994476b65cb5e272ff0f720a1fd31322e53f (diff)
downloadlinux-47caf685a6854593348f216e0b489b71c10cbe03.tar.bz2
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: 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: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/reg.c')
-rw-r--r--net/wireless/reg.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 35b8847a2f6d..d8a90d397423 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -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;