From: Luiz Augusto von Dentz luiz.von.dentz@intel.com
[ Upstream commit 81137162bfaa7278785b24c1fd2e9e74f082e8e4 ]
struct hci_dev_info has a fixed size name[8] field so in the event that hdev->name is bigger than that strcpy would attempt to write past its size, so this fixes this problem by switching to use strscpy.
Fixes: dcda165706b9 ("Bluetooth: hci_core: Fix build warnings") Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/hci_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 5f1fbf86e0ceb..b9cf5bc9364c1 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2175,7 +2175,7 @@ int hci_get_dev_info(void __user *arg) else flags = hdev->flags;
- strcpy(di.name, hdev->name); + strscpy(di.name, hdev->name, sizeof(di.name)); di.bdaddr = hdev->bdaddr; di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4); di.flags = flags;