netdev - [PATCH wireless v2] nl80211/cfg80211: add nla

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Message-Id: <20240119151201.8670-1-linma@zju.edu.cn>
Date: Fri, 19 Jan 2024 23:12:01 +0800
From: Lin Ma <linma@....edu.cn>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kvalo@...nel.org
Cc: Lin Ma <linma@....edu.cn>
Subject: [PATCH wireless v2] nl80211/cfg80211: add nla_policy for S1G band

Our detector has identified another case of an incomplete policy.
Specifically, the commit df78a0c0b67d ("nl80211: S1G band and channel
definitions") introduced the NL80211_BAND_S1GHZ attribute to
nl80211_band, but it neglected to update the
nl80211_match_band_rssi_policy accordingly.

Similar commits that add new band types, such as the initial
commit 1e1b11b6a111 ("nl80211/cfg80211: Specify band specific min RSSI
thresholds with sched scan"), the commit e548a1c36b11 ("cfg80211: add 6GHz
in code handling array with NUM_NL80211_BANDS entries"), and the
commit 63fa04266629 ("nl80211: Add LC placeholder band definition to
nl80211_band"), all require updates to the policy.
Failure to do so could result in accessing an attribute of unexpected
length in the function nl80211_parse_sched_scan_per_band_rssi.

To resolve this issue, this commit adds the policy for the
NL80211_BAND_S1GHZ attribute.

Fixes: df78a0c0b67d ("nl80211: S1G band and channel definitions")
Signed-off-by: Lin Ma <linma@....edu.cn>
---
V1 -> V2: change net-next to wireless as suggested

 net/wireless/nl80211.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 60877b532993..980300621a60 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -911,6 +911,7 @@ nl80211_match_band_rssi_policy[NUM_NL80211_BANDS] = {
 	[NL80211_BAND_5GHZ] = { .type = NLA_S32 },
 	[NL80211_BAND_6GHZ] = { .type = NLA_S32 },
 	[NL80211_BAND_60GHZ] = { .type = NLA_S32 },
+	[NL80211_BAND_S1GHZ] = { .type = NLA_S32 },
 	[NL80211_BAND_LC]    = { .type = NLA_S32 },
 };

-- 
2.34.1