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Bluetooth: hci_sock: Fix not validating setsockopt user input

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Check user input length before copying data.

Fixes: 09572fca72 ("Bluetooth: hci_sock: Add support for BT_{SND,RCV}BUF")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2024-04-05 16:46:50 -04:00
parent 9e8742cdfc
commit b2186061d6
1 changed files with 8 additions and 13 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

21
net/bluetooth/hci_sock.c
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@ -1946,10 +1946,9 @@ static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
switch (optname) {
case HCI_DATA_DIR:
if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
err = -EFAULT;
err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, len);
if (err)
break;
}
if (opt)
hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
@ -1958,10 +1957,9 @@ static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
break;
case HCI_TIME_STAMP:
if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
err = -EFAULT;
err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, len);
if (err)
break;
}
if (opt)
hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
@ -1979,11 +1977,9 @@ static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
uf.event_mask[1] = *((u32 *) f->event_mask + 1);
}
len = min_t(unsigned int, len, sizeof(uf));
if (copy_from_sockptr(&uf, optval, len)) {
err = -EFAULT;
err = bt_copy_from_sockptr(&uf, sizeof(uf), optval, len);
if (err)
break;
}
if (!capable(CAP_NET_RAW)) {
uf.type_mask &= hci_sec_filter.type_mask;
@ -2042,10 +2038,9 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
goto done;
}
if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
err = -EFAULT;
err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, len);
if (err)
break;
}
hci_pi(sk)->mtu = opt;
break;