From 0dff6f05a9dccef1675ddae3c1843ef9dee59bac Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Mon, 7 Mar 2022 19:48:01 +0200
Subject: [PATCH] ath6kl: wmi: Replace one-element array with flexible-array member in struct wmi_aplist_event
Git-commit: 0dff6f05a9dccef1675ddae3c1843ef9dee59bac
Patch-mainline: v5.18-rc1
References: bsc#1206451
Replace one-element array with flexible-array member in struct
wmi_aplist_event.
Also, make use of the struct_size() helper and remove unneeded variable
ap_info_entry_size.
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@quicinc.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/1b7889828f23763c034c1558cbab9c8e2066053e.1645736204.git.gustavoars@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/ath/ath6kl/wmi.c | 5 +----
drivers/net/wireless/ath/ath6kl/wmi.h | 2 +-
2 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.c b/drivers/net/wireless/ath/ath6kl/wmi.c
index bdfc057c5a82..3787b9fb0075 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@@ -1750,7 +1750,6 @@ static int ath6kl_wmi_snr_threshold_event_rx(struct wmi *wmi, u8 *datap,
static int ath6kl_wmi_aplist_event_rx(struct wmi *wmi, u8 *datap, int len)
{
- u16 ap_info_entry_size;
struct wmi_aplist_event *ev = (struct wmi_aplist_event *) datap;
struct wmi_ap_info_v1 *ap_info_v1;
u8 index;
@@ -1759,14 +1758,12 @@ static int ath6kl_wmi_aplist_event_rx(struct wmi *wmi, u8 *datap, int len)
ev->ap_list_ver != APLIST_VER1)
return -EINVAL;
- ap_info_entry_size = sizeof(struct wmi_ap_info_v1);
ap_info_v1 = (struct wmi_ap_info_v1 *) ev->ap_list;
ath6kl_dbg(ATH6KL_DBG_WMI,
"number of APs in aplist event: %d\n", ev->num_ap);
- if (len < (int) (sizeof(struct wmi_aplist_event) +
- (ev->num_ap - 1) * ap_info_entry_size))
+ if (len < struct_size(ev, ap_list, ev->num_ap))
return -EINVAL;
/* AP list version 1 contents */
diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 317cdf8ad1dd..672014973cee 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1957,7 +1957,7 @@ union wmi_ap_info {
struct wmi_aplist_event {
u8 ap_list_ver;
u8 num_ap;
- union wmi_ap_info ap_list[1];
+ union wmi_ap_info ap_list[];
} __packed;
/* Developer Commands */
--
2.35.3