Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in sk_skb_reason_drop

[Hillf Danton]

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  2ccbdf43d5e7

--- x/net/bluetooth/hci_request.c
+++ h/net/bluetooth/hci_request.c
@@ -160,6 +160,8 @@ int __hci_req_sync(struct hci_dev *hdev,
 
 	if (err == -ERESTARTSYS)
 		return -EINTR;
+	if (!err)
+		return -ETIMEDOUT;
 
 	switch (hdev->req_status) {
 	case HCI_REQ_DONE:
--