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Bluetooth: hci_event: Use struct_size() helper

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.

So, change the following form:

sizeof(*ev) + ev->num_hndl * sizeof(struct hci_comp_pkts_info)

 to :

struct_size(ev, handles, ev->num_hndl)

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Gustavo A. R. Silva 2019-02-07 18:40:33 -06:00 committed by Marcel Holtmann
parent 32a7b4cbe9
commit 16e183423f
1 changed files with 4 additions and 4 deletions
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8
net/bluetooth/hci_event.c
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@ -3556,8 +3556,8 @@ static void hci_num_comp_pkts_evt(struct hci_dev *hdev, struct sk_buff *skb)
return;
}
if (skb->len < sizeof(*ev) || skb->len < sizeof(*ev) +
ev->num_hndl * sizeof(struct hci_comp_pkts_info)) {
if (skb->len < sizeof(*ev) ||
skb->len < struct_size(ev, handles, ev->num_hndl)) {
BT_DBG("%s bad parameters", hdev->name);
return;
}
@ -3644,8 +3644,8 @@ static void hci_num_comp_blocks_evt(struct hci_dev *hdev, struct sk_buff *skb)
return;
}
if (skb->len < sizeof(*ev) || skb->len < sizeof(*ev) +
ev->num_hndl * sizeof(struct hci_comp_blocks_info)) {
if (skb->len < sizeof(*ev) ||
skb->len < struct_size(ev, handles, ev->num_hndl)) {
BT_DBG("%s bad parameters", hdev->name);
return;
}