linux-kernel - [PATCH v2 5/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_disconnect

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Date:   Thu, 24 Feb 2022 15:17:32 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jeff Johnson <quic_jjohnson@...cinc.com>
Cc:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-hardening@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>
Subject: [PATCH v2 5/6][next] ath6kl: wmi: Replace one-element array with
 flexible-array member in struct wmi_disconnect_event

Replace one-element array with flexible-array member in struct
wmi_disconnect_event.

This issue was found with the help of Coccinelle and audited and fixed,
manually.

Link: https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays
Link: https://github.com/KSPP/linux/issues/79
Reviewed-by: Jeff Johnson <quic_jjohnson@...cinc.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
Changes in v2:
 - Revert changes in if-statement logic:
        if (len < sizeof(struct wmi_disconnect_event))
   Link: https://lore.kernel.org/linux-hardening/03cee2a7-1455-b788-e1f0-5fb48db3478c@quicinc.com/
 - Update changelog text.
 - Add Reviewed-by: Jeff Johnson <quic_jjohnson@...cinc.com> tag.

 drivers/net/wireless/ath/ath6kl/wmi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 6b064e669d87..6a7fc07cd9aa 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1596,7 +1596,7 @@ struct wmi_disconnect_event {
 	u8 disconn_reason;
 
 	u8 assoc_resp_len;
-	u8 assoc_info[1];
+	u8 assoc_info[];
 } __packed;
 
 /*
-- 
2.27.0