From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Johannes Berg <johannes.berg@intel.com>,
Sasha Levin <sashal@kernel.org>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 024/671] cfg80211: regulatory: make initialization more robust
Date: Thu, 16 Jan 2020 11:44:15 -0500 [thread overview]
Message-ID: <20200116165502.8838-24-sashal@kernel.org> (raw)
In-Reply-To: <20200116165502.8838-1-sashal@kernel.org>
From: Johannes Berg <johannes.berg@intel.com>
[ Upstream commit 71e5e886806ee3f8e0c44ed945eb2e4d6659c6e3 ]
Since my change to split out the regulatory init to occur later,
any issues during earlier cfg80211_init() or errors during the
platform device allocation would lead to crashes later. Make this
more robust by checking that the earlier initialization succeeded.
Fixes: d7be102f2945 ("cfg80211: initialize regulatory keys/database later")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/wireless/reg.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 64841238df85..5643bdee7198 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -3870,6 +3870,15 @@ static int __init regulatory_init_db(void)
{
int err;
+ /*
+ * It's possible that - due to other bugs/issues - cfg80211
+ * never called regulatory_init() below, or that it failed;
+ * in that case, don't try to do any further work here as
+ * it's doomed to lead to crashes.
+ */
+ if (IS_ERR_OR_NULL(reg_pdev))
+ return -EINVAL;
+
err = load_builtin_regdb_keys();
if (err)
return err;
--
2.20.1
next parent reply other threads:[~2020-01-16 19:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200116165502.8838-1-sashal@kernel.org>
2020-01-16 16:44 ` Sasha Levin [this message]
2020-01-16 16:44 ` [PATCH AUTOSEL 4.19 030/671] iwlwifi: nvm: get num of hw addresses from firmware Sasha Levin
2020-01-16 16:44 ` [PATCH AUTOSEL 4.19 035/671] rtlwifi: rtl8821ae: replace _rtl8821ae_mrate_idx_to_arfr_id with generic version Sasha Levin
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