From e47b9b2b005ab8b1b83bc0ac4aa2803cba57182a Mon Sep 17 00:00:00 2001
From: Lior David <qca_liord@qca.qualcomm.com>
Date: Tue, 14 Nov 2017 15:25:39 +0200
Subject: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/ath/wil6210/wmi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'drivers/net/wireless/ath/wil6210/wmi.c')

diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c
index 6ed26baca0e5..7af8479acb98 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.c
+++ b/drivers/net/wireless/ath/wil6210/wmi.c
@@ -1035,8 +1035,14 @@ 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;
-- 
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