* [PATCH AUTOSEL 4.9 06/13] cfg80211: regulatory: reject invalid hints
[not found] <20200907163524.1281734-1-sashal@kernel.org>
@ 2020-09-07 16:35 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2020-09-07 16:35 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Johannes Berg, syzbot+d451401ffd00a60677ee, Sasha Levin,
linux-wireless, netdev
From: Johannes Berg <johannes.berg@intel.com>
[ Upstream commit 47caf685a6854593348f216e0b489b71c10cbe03 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/wireless/reg.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 6d5f3f737207d..a649763b854d5 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2321,6 +2321,9 @@ 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;
--
2.25.1
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2020-09-07 16:35 ` [PATCH AUTOSEL 4.9 06/13] cfg80211: regulatory: reject invalid hints Sasha Levin
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