From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
To: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Kalle Valo <kvalo@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-hardening@vger.kernel.org,
"Gustavo A. R. Silva" <gustavoars@kernel.org>
Subject: [PATCH 1/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_begin_scan_cmd
Date: Tue, 22 Feb 2022 20:38:31 -0600 [thread overview]
Message-ID: <af3e7cf6101586a6de9710d8f1302763aa7c6396.1645583264.git.gustavoars@kernel.org> (raw)
In-Reply-To: <cover.1645583264.git.gustavoars@kernel.org>
Replace one-element array with flexible-array member in struct
wmi_begin_scan_cmd. Also, make use of the struct_size() helper.
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
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/net/wireless/ath/ath6kl/wmi.c | 9 ++-------
drivers/net/wireless/ath/ath6kl/wmi.h | 2 +-
2 files changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index bd1ef6334997..e1c950014f3e 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -2008,7 +2008,7 @@ int ath6kl_wmi_beginscan_cmd(struct wmi *wmi, u8 if_idx,
struct ieee80211_supported_band *sband;
struct sk_buff *skb;
struct wmi_begin_scan_cmd *sc;
- s8 size, *supp_rates;
+ s8 *supp_rates;
int i, band, ret;
struct ath6kl *ar = wmi->parent_dev;
int num_rates;
@@ -2023,18 +2023,13 @@ int ath6kl_wmi_beginscan_cmd(struct wmi *wmi, u8 if_idx,
num_chan, ch_list);
}
- size = sizeof(struct wmi_begin_scan_cmd);
-
if ((scan_type != WMI_LONG_SCAN) && (scan_type != WMI_SHORT_SCAN))
return -EINVAL;
if (num_chan > WMI_MAX_CHANNELS)
return -EINVAL;
- if (num_chan)
- size += sizeof(u16) * (num_chan - 1);
-
- skb = ath6kl_wmi_get_new_buf(size);
+ skb = ath6kl_wmi_get_new_buf(struct_size(sc, ch_list, num_chan));
if (!skb)
return -ENOMEM;
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 784940ba4c90..322539ed9c12 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -863,7 +863,7 @@ struct wmi_begin_scan_cmd {
u8 num_ch;
/* channels in Mhz */
- __le16 ch_list[1];
+ __le16 ch_list[];
} __packed;
/* wmi_start_scan_cmd is to be deprecated. Use
--
2.27.0
next prev parent reply other threads:[~2022-02-23 2:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-23 2:38 [PATCH 0/6][next] ath6kl: wmi: Replace one-element arrays with flexible-array members Gustavo A. R. Silva
2022-02-23 2:38 ` Gustavo A. R. Silva [this message]
2022-02-24 0:48 ` [PATCH 1/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_begin_scan_cmd Jeff Johnson
2022-02-23 2:38 ` [PATCH 2/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_start_scan_cmd Gustavo A. R. Silva
2022-02-23 2:38 ` [PATCH 3/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_channel_list_reply Gustavo A. R. Silva
2022-02-24 0:49 ` Jeff Johnson
2022-02-23 2:38 ` [PATCH 4/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_connect_event Gustavo A. R. Silva
2022-02-24 0:50 ` Jeff Johnson
2022-02-24 20:08 ` Gustavo A. R. Silva
2022-02-23 2:39 ` [PATCH 5/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_disconnect_event Gustavo A. R. Silva
2022-02-24 0:53 ` Jeff Johnson
2022-02-23 2:39 ` [PATCH 6/6][next] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_aplist_event Gustavo A. R. Silva
2022-02-24 1:01 ` Jeff Johnson
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