Commits

Takashi Iwai committed 599a6fc37a0
Bluetooth: vhci: Fix race at creating hci device [ Upstream commit c7c999cb18da88a881e10e07f0724ad0bfaff770 ] hci_vhci driver creates a hci device object dynamically upon each HCI_VENDOR_PKT write. Although it checks the already created object and returns an error, it's still racy and may build multiple hci_dev objects concurrently when parallel writes are performed, as the device tracks only a single hci_dev object. This patch introduces a mutex to protect against the concurrent device creations. Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>