From: Lior David <qca_liord@qca.qualcomm.com>
Date: Tue, 14 Nov 2017 13:25:39 +0000 (+0200)
Subject: wil6210: missing length check in wmi_set_ie
X-Git-Tag: v4.14.86~124
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=107b02c81a8761f1f7efc1e8b54d435324ccd13e;p=users%2Fjedix%2Flinux-maple.git

wil6210: missing length check in wmi_set_ie

commit b5a8ffcae4103a9d823ea3aa3a761f65779fbe2a upstream.

Add a length check in wmi_set_ie to detect unsigned integer
overflow.

Signed-off-by: Lior David <qca_liord@qca.qualcomm.com>
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index ffdd2fa401b1..d63d7c326801 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -1380,8 +1380,14 @@ int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie)
 	};
 	int rc;
 	u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len;
-	struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL);
+	struct wmi_set_appie_cmd *cmd;
 
+	if (len < ie_len) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	cmd = kzalloc(len, GFP_KERNEL);
 	if (!cmd) {
 		rc = -ENOMEM;
 		goto out;