6.1-stable review patch. If anyone has any objections, please let me know.
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From: Luiz Augusto von Dentz luiz.von.dentz@intel.com
[ Upstream commit b2186061d6043d6345a97100460363e990af0d46 ]
Check user input length before copying data.
Fixes: 09572fca7223 ("Bluetooth: hci_sock: Add support for BT_{SND,RCV}BUF") Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/bluetooth/hci_sock.c | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-)
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 730e569cae36d..e7ec68fa3ad3c 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -1883,10 +1883,9 @@ 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; @@ -1895,10 +1894,9 @@ 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; @@ -1916,11 +1914,9 @@ 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; @@ -1979,10 +1975,9 @@ 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;