kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

A use-after-free flaw was found in hcisendacl in the bluetooth host controller interface HCI in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hcidisconnloglinkcompleteevt, yet stil...