[PATCH 4/8] wifi: cfg80211: guard optional PMSR nominal time

[Zhao Li <enderaoelyther@gmail.com>]

pmsr_parse_ftm() rejects a request that omits NOMINAL_TIME only for
non-trigger-based PD ranging. It then reads the attribute
unconditionally for every non-trigger-based request:

	out->ftm.nominal_time =
		nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NOMINAL_TIME]);

For the other non-trigger-based request types NOMINAL_TIME is optional,
so tb[...] can be NULL and nla_get_u32() dereferences a NULL pointer.

Keep the requirement for PD ranging and read the nominal-time value only
when the attribute is present.

Fixes: 8823a9b0e7af ("wifi: cfg80211: add NTB continuous ranging and FTM request type support")
Cc: stable@vger.kernel.org
Assisted-by: Codex:gpt-5
Assisted-by: Claude:opus-4.8
Signed-off-by: Zhao Li <enderaoelyther@gmail.com>
---
 net/wireless/pmsr.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c
index 34c3625f7fd5e..d1e2fae5bc0e5 100644
--- a/net/wireless/pmsr.c
+++ b/net/wireless/pmsr.c
@@ -263,8 +263,9 @@ static int pmsr_parse_ftm(struct cfg80211_registered_device *rdev,
 				       "FTM: nominal time is required for PD NTB ranging");
 			return -EINVAL;
 		}
-		out->ftm.nominal_time =
-			nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NOMINAL_TIME]);
+		if (tb[NL80211_PMSR_FTM_REQ_ATTR_NOMINAL_TIME])
+			out->ftm.nominal_time =
+				nla_get_u32(tb[NL80211_PMSR_FTM_REQ_ATTR_NOMINAL_TIME]);
 
 		if (tb[NL80211_PMSR_FTM_REQ_ATTR_MIN_TIME_BETWEEN_MEASUREMENTS])
 			out->ftm.min_time_between_measurements =
-- 
2.50.1 (Apple Git-155)