diff mbox series

[wireless,5/8] wifi: nl80211: don't free NULL coalescing rule

Message ID 20240418105220.b328f80406e7.Id75d961050deb05b3e4e354e024866f350c68103@changeid
State New
Headers show
Series [wireless,1/8] wifi: mac80211: fix idle calculation with multi-link | expand

Commit Message

Johannes Berg April 18, 2024, 8:52 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

If the parsing fails, we can dereference a NULL pointer here.

Fixes: be29b99a9b51 ("cfg80211/nl80211: Add packet coalesce support")
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/nl80211.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

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);