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wifi: cfg80211: allow zero HE OBSS PD offsets

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IEEE Std 802.11 permits the OBSS PD offset fields in the Spatial Reuse
Parameter Set element to have a value of zero. (IEEE Std 802.11-2024,
26.10.2.4)

The standard specifies the offsets as unsigned values added to -82 dBm,
with field presence signalled independently. The valid offset range is
therefore 0..20.

nl80211 currently rejects zero for all three HE OBSS PD offset
attributes during nested netlink policy validation, before the values
reach cfg80211 or the driver. Allow zero while retaining the upper bound
and the existing minimum/maximum relationship validation.

Fixes: 796e90f42b ("cfg80211: add support for parsing OBBS_PD attributes")
Signed-off-by: Dominic White <github@singe.za.net>
Link: https://patch.msgid.link/20260903081804.96532-1-github@singe.za.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Dominic White 2026-09-03 10:18:04 +02:00 committed by Johannes Berg
parent f49defea76
commit d9ecaa0a31
1 changed files with 3 additions and 3 deletions
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6
net/wireless/nl80211.c
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@ -529,11 +529,11 @@ nl80211_pmsr_attr_policy[NL80211_PMSR_ATTR_MAX + 1] = {
static const struct nla_policy
he_obss_pd_policy[NL80211_HE_OBSS_PD_ATTR_MAX + 1] = {
[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET] =
NLA_POLICY_RANGE(NLA_U8, 1, 20),
NLA_POLICY_RANGE(NLA_U8, 0, 20),
[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET] =
NLA_POLICY_RANGE(NLA_U8, 1, 20),
NLA_POLICY_RANGE(NLA_U8, 0, 20),
[NL80211_HE_OBSS_PD_ATTR_NON_SRG_MAX_OFFSET] =
NLA_POLICY_RANGE(NLA_U8, 1, 20),
NLA_POLICY_RANGE(NLA_U8, 0, 20),
[NL80211_HE_OBSS_PD_ATTR_BSS_COLOR_BITMAP] =
NLA_POLICY_EXACT_LEN(8),
[NL80211_HE_OBSS_PD_ATTR_PARTIAL_BSSID_BITMAP] =