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Bluetooth: hci_core: Fix possible buffer overflow

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[ 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>
This commit is contained in:
Luiz Augusto von Dentz
2024-02-28 10:49:26 -05:00
committed by Sasha Levin
parent 6e96039070
commit 6d5a9d4a7b
1 changed files with 1 additions and 1 deletions
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net/bluetooth/hci_core.c
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@@ -2074,7 +2074,7 @@ int hci_get_dev_info(void __user *arg)
else else
flags = hdev->flags; flags = hdev->flags;
strcpy(di.name, hdev->name); strscpy(di.name, hdev->name, sizeof(di.name));
di.bdaddr = hdev->bdaddr; di.bdaddr = hdev->bdaddr;
di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4); di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
di.flags = flags; di.flags = flags;