Patch "wifi: nl80211: don't free NULL coalescing rule" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    wifi: nl80211: don't free NULL coalescing rule

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     wifi-nl80211-don-t-free-null-coalescing-rule.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1b6c4337d6a51acbaf66a30ff63e54182604c58c
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date:   Thu Apr 18 10:52:23 2024 +0200

    wifi: nl80211: don't free NULL coalescing rule
    
    [ Upstream commit 801ea33ae82d6a9d954074fbcf8ea9d18f1543a7 ]
    
    If the parsing fails, we can dereference a NULL pointer here.
    
    Cc: stable@xxxxxxxxxxxxxxx
    Fixes: be29b99a9b51 ("cfg80211/nl80211: Add packet coalesce support")
    Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
    Link: https://msgid.link/20240418105220.b328f80406e7.Id75d961050deb05b3e4e354e024866f350c68103@changeid
    Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 933591f9704b8..846e40dc00bb6 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -12642,6 +12642,8 @@ 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);




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