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| author | Mathias Krause <minipli@googlemail.com> | 2012-08-15 11:31:46 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-02 10:29:36 -0700 |
| commit | 87c42a1dfd5939d0a24795cd99b3d63daa4e1eff (patch) | |
| tree | abff8acbebc4d3f6037a53ea40dee1e9c75e1fff /net/bluetooth | |
| parent | 458ed5622e976848aacdea07d4bfcb84a350c460 (diff) | |
| download | linux-3.10-87c42a1dfd5939d0a24795cd99b3d63daa4e1eff.tar.gz linux-3.10-87c42a1dfd5939d0a24795cd99b3d63daa4e1eff.tar.bz2 linux-3.10-87c42a1dfd5939d0a24795cd99b3d63daa4e1eff.zip | |
Bluetooth: HCI - Fix info leak in getsockopt(HCI_FILTER)
[ Upstream commit e15ca9a0ef9a86f0477530b0f44a725d67f889ee ]
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 <minipli@googlemail.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/bluetooth')
| -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 5914623f426..2f6ab5b8f21 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -1016,6 +1016,7 @@ static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char { 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); |