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kernel_xiaomi_msm8998: 提交

Mirror: https://github.com/0ranko0P/kernel_xiaomi_msm8998/

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修订版03b4aeda9b6f455d81d1147f0900f1320bc48a44 (tree)
时间2020-02-15 06:30:02
作者Nicolai Stange <nstange@suse...>
CommiterGreg Kroah-Hartman

Log Message

libertas: don't exit from lbs_ibss_join_existing() with RCU read lock held

[ Upstream commit c7bf1fb7ddca331780b9a733ae308737b39f1ad4 ]

Commit e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss
descriptor") introduced a bounds check on the number of supplied rates to

Unfortunately, it introduced a return path from within a RCU read side
critical section without a corresponding rcu_read_unlock(). Fix this.

Fixes: e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss descriptor")
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>



--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1853,6 +1853,7 @@ static int lbs_ibss_join_existing(struct lbs_private *priv,
18531853 rates_max = rates_eid[1];
18541854 if (rates_max > MAX_RATES) {
18551855 lbs_deb_join("invalid rates");
1856+ rcu_read_unlock();
18561857 goto out;
18571858 }
18581859 rates = cmd.bss.rates;
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