From 801ea33ae82d6a9d954074fbcf8ea9d18f1543a7 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 18 Apr 2024 10:52:23 +0200 Subject: wifi: nl80211: don't free NULL coalescing rule If the parsing fails, we can dereference a NULL pointer here. Cc: stable@vger.kernel.org Fixes: be29b99a9b51 ("cfg80211/nl80211: Add packet coalesce support") Reviewed-by: Miriam Rachel Korenblit Link: https://msgid.link/20240418105220.b328f80406e7.Id75d961050deb05b3e4e354e024866f350c68103@changeid Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/wireless') diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b4edba6b0b7b..30ff9a470813 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -14030,6 +14030,8 @@ static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info) error: for (i = 0; i < new_coalesce.n_rules; i++) { tmp_rule = &new_coalesce.rules[i]; + if (!tmp_rule) + continue; for (j = 0; j < tmp_rule->n_patterns; j++) kfree(tmp_rule->patterns[j].mask); kfree(tmp_rule->patterns); -- cgit v1.2.3-58-ga151