netdev - Re: WARNING in hwsim_new_radio

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Date:   Tue, 14 Apr 2020 12:42:17 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     syzbot <syzbot+a4aee3f42d7584d76761@...kaller.appspotmail.com>,
        davem@...emloft.net, johannes@...solutions.net,
        kvalo@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: WARNING in hwsim_new_radio_nl

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git master

I don't see why the bisection pointed to the MPTCP commit ?!? the
following patch should address the issue.
---
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 7fe8207db6ae..2082abdb08d4 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -635,7 +635,8 @@ static const struct nla_policy hwsim_genl_policy[HWSIM_ATTR_MAX + 1] = {
        [HWSIM_ATTR_SUPPORT_P2P_DEVICE] = { .type = NLA_FLAG },
        [HWSIM_ATTR_USE_CHANCTX] = { .type = NLA_FLAG },
        [HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE] = { .type = NLA_FLAG },
-       [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING },
+       [HWSIM_ATTR_RADIO_NAME] = { .type = NLA_STRING,
+                                   .len = NL80211_WIPHY_NAME_MAXLEN },
        [HWSIM_ATTR_NO_VIF] = { .type = NLA_FLAG },
        [HWSIM_ATTR_FREQ] = { .type = NLA_U32 },
        [HWSIM_ATTR_TX_INFO_FLAGS] = { .type = NLA_BINARY },