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cfg80211: remove WARN_ON() in cfg80211_sme_connect

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commit 1b5ab825d9acc0f27d2f25c6252f3526832a9626 upstream.

A WARN_ON(wdev->conn) would trigger in cfg80211_sme_connect(), if multiple
send_msg(NL80211_CMD_CONNECT) system calls are made from the userland, which
should be anticipated and handled by the wireless driver. Remove this WARN_ON()
to prevent kernel panic if kernel is configured to "panic_on_warn".

Bug reported by syzbot.

Reported-by: syzbot+5f9392825de654244975@syzkaller.appspotmail.com
Signed-off-by: Du Cheng <ducheng2@gmail.com>
Link: https://lore.kernel.org/r/20210407162756.6101-1-ducheng2@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Du Cheng 2021-04-08 00:27:56 +08:00 committed by Greg Kroah-Hartman
parent 138a6e1dc3
commit 26ab092615
1 changed files with 1 additions and 1 deletions
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2
net/wireless/sme.c
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@ -530,7 +530,7 @@ static int cfg80211_sme_connect(struct wireless_dev *wdev,
cfg80211_sme_free(wdev);
}
if (WARN_ON(wdev->conn))
if (wdev->conn)
return -EINPROGRESS;
wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL);