diff options
| author | Mathias Krause <[email protected]> | 2012-08-15 11:31:46 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2012-08-15 21:36:30 -0700 |
| commit | e15ca9a0ef9a86f0477530b0f44a725d67f889ee (patch) | |
| tree | ab24fc2022a7e5c993940ecfb5a3889e4bdc4c24 | |
| parent | 3c0c5cfdcd4d69ffc4b9c0907cec99039f30a50a (diff) | |
Bluetooth: HCI - Fix info leak in getsockopt(HCI_FILTER)
The HCI code fails to initialize the two padding bytes of struct
hci_ufilter before copying it to userland -- that for leaking two
bytes kernel stack. Add an explicit memset(0) before filling the
structure to avoid the info leak.
Signed-off-by: Mathias Krause <[email protected]>
Cc: Marcel Holtmann <[email protected]>
Cc: Gustavo Padovan <[email protected]>
Cc: Johan Hedberg <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
| -rw-r--r-- | net/bluetooth/hci_sock.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index a7f04de03d79..a27bbc3cd4b7 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -1009,6 +1009,7 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, { struct hci_filter *f = &hci_pi(sk)->filter; + memset(&uf, 0, sizeof(uf)); uf.type_mask = f->type_mask; uf.opcode = f->opcode; uf.event_mask[0] = *((u32 *) f->event_mask + 0); |