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@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Du Cheng <ducheng2@xxxxxxxxx> --- change log v1: convert WARN_ON() to pr_warn() https://lore.kernel.org/linux-wireless/YG3bYPSB7Guv%2FKEe@carbon/T/#t v2: just drop the WARN_ON() net/wireless/sme.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/sme.c b/net/wireless/sme.c index 07756ca5e3b5..08a70b4f090c 100644 --- a/net/wireless/sme.c +++ b/net/wireless/sme.c @@ -529,7 +529,7 @@ 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); -- 2.30.2
