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wifi: nl80211: don't free NULL coalescing rule

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BugLink: https://bugs.launchpad.net/bugs/2070349

[ Upstream commit 801ea33ae82d6a9d954074fbcf8ea9d18f1543a7 ]

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

Cc: stable@vger.kernel.org
Fixes: be29b99a9b ("cfg80211/nl80211: Add packet coalesce support")
Reviewed-by: Miriam Rachel Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240418105220.b328f80406e7.Id75d961050deb05b3e4e354e024866f350c68103@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Johannes Berg
2024-04-18 10:52:23 +02:00
committed by Stefan Bader
parent 598ab412b8
commit 53a72e6393
1 changed files with 2 additions and 0 deletions
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net/wireless/nl80211.c
+2
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@@ -14092,6 +14092,8 @@ 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);