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Subject[PATCH AUTOSEL 4.4 018/100] libertas: make lbs_ibss_join_existing() return error code on rates overflow
Date
From: Nicolai Stange <nstange@suse.de>

[ Upstream commit 1754c4f60aaf1e17d886afefee97e94d7f27b4cb ]

Commit e5e884b42639 ("libertas: Fix two buffer overflows at parsing bss
descriptor") introduced a bounds check on the number of supplied rates to
lbs_ibss_join_existing() and made it to return on overflow.

However, the aforementioned commit doesn't set the return value accordingly
and thus, lbs_ibss_join_existing() would return with zero even though it
failed.

Make lbs_ibss_join_existing return -EINVAL in case the bounds check on the
number of supplied rates fails.

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>
---
drivers/net/wireless/libertas/cfg.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/libertas/cfg.c b/drivers/net/wireless/libertas/cfg.c
index 803684eed142c..7d55de21b1903 100644
--- a/drivers/net/wireless/libertas/cfg.c
+++ b/drivers/net/wireless/libertas/cfg.c
@@ -1854,6 +1854,7 @@ static int lbs_ibss_join_existing(struct lbs_private *priv,
if (rates_max > MAX_RATES) {
lbs_deb_join("invalid rates");
rcu_read_unlock();
+ ret = -EINVAL;
goto out;
}
rates = cmd.bss.rates;
--
2.20.1
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