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Bluetooth: hci_sock: fix slab oob read in create_monitor_event

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commit 18f547f3fc074500ab5d419cf482240324e73a7e upstream.

When accessing hdev->name, the actual string length should prevail

Reported-by: syzbot+c90849c50ed209d77689@syzkaller.appspotmail.com
Fixes: dcda165706b9 ("Bluetooth: hci_core: Fix build warnings")
Signed-off-by: Edward AD <twuufnxlz@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Edward AD 2023-10-10 13:36:57 +08:00 committed by Greg Kroah-Hartman
parent a0f0e43128
commit 4d161e18b1
1 changed files with 1 additions and 1 deletions
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2
net/bluetooth/hci_sock.c
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@ -430,7 +430,7 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
ni->type = hdev->dev_type;
ni->bus = hdev->bus;
bacpy(&ni->bdaddr, &hdev->bdaddr);
memcpy(ni->name, hdev->name, 8);
memcpy(ni->name, hdev->name, strlen(hdev->name));
opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
break;