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* [PATCH] cfg80211: scan: drop entry from hidden_list on overflow
@ 2021-04-16  7:42 Johannes Berg
  0 siblings, 0 replies; only message in thread
From: Johannes Berg @ 2021-04-16  7:42 UTC (permalink / raw)
  To: linux-wireless; +Cc: Johannes Berg, Dan Carpenter

From: Johannes Berg <johannes.berg@intel.com>

If we overflow the maximum number of BSS entries and free the
new entry, drop it from any hidden_list that it may have been
added to in the code above or in cfg80211_combine_bsses().

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/scan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 758eb7d2a706..caa8eafbd583 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1751,6 +1751,8 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev,
 
 		if (rdev->bss_entries >= bss_entries_limit &&
 		    !cfg80211_bss_expire_oldest(rdev)) {
+			if (!list_empty(&new->hidden_list))
+				list_del(&new->hidden_list);
 			kfree(new);
 			goto drop;
 		}
-- 
2.30.2


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