linux-hardening - [PATCH v2 3/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_channel_list

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Message-ID: <f3f9728a1dfc3767340f25a963be374e2ef5d8ad.1645736204.git.gustavoars@kernel.org>
Date:   Thu, 24 Feb 2022 15:16:46 -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 3/6][next] ath6kl: wmi: Replace one-element array with
 flexible-array member in struct wmi_channel_list_reply

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

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_channel_list_reply))
   Link: https://lore.kernel.org/linux-hardening/3abb0846-a26f-3d76-8936-cd23cf4387f1@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 9e168752bec2..432e4f428a4a 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1373,7 +1373,7 @@ struct wmi_channel_list_reply {
 	u8 num_ch;
 
 	/* channel in Mhz */
-	__le16 ch_list[1];
+	__le16 ch_list[];
 } __packed;
 
 /* List of Events (target to host) */
-- 
2.27.0