net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI controller.Referenceshttps://github.com/torvalds/linux/commit/e2cb6b891ad2b8caa9131e3be70f45243df82a80https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e2cb6b891ad2b8caa9131e3be70f45243df82a80http://www.openwall.com/lists/oss-security/2021/05/11/2https://security.netapp.com/advisory/ntap-20210622-0006/https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlhttps://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
