[PATCH] wifi: cfg80211: reject empty PMSR peer lists

[Zhao Li]

A PMSR request with an empty peers array is not a useful request and
weakens the cfg80211-to-driver contract by allowing start_pmsr() with
no target peer.

Reject empty peer lists before allocating the request object or calling
into the driver.

Fixes: 9bb7e0f24e7e7 ("cfg80211: add peer measurement with FTM initiator API")
Assisted-by: Codex:gpt-5.5
Assisted-by: Claude:claude-opus-4.8
Signed-off-by: Zhao Li <enderaoelyther@xxxxxxxxx>
---
 net/wireless/pmsr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c
index d6cd0de64d1f8..3bf2b2d2546d4 100644
--- a/net/wireless/pmsr.c
+++ b/net/wireless/pmsr.c
@@ -313,6 +313,11 @@ int nl80211_pmsr_start(struct sk_buff *skb, struct genl_info *info)
 		}
 	}
 
+	if (!count) {
+		NL_SET_ERR_MSG_ATTR(info->extack, peers, "No peers specified");
+		return -EINVAL;
+	}
+
 	req = kzalloc_flex(*req, peers, count);
 	if (!req)
 		return -ENOMEM;
-- 
2.50.1 (Apple Git-155)