* [PATCH] bluetooth: l2cap: fix 1 byte infoleak to userspace
@ 2011-02-10 17:59 Vasiliy Kulikov
2011-02-10 18:11 ` Gustavo F. Padovan
0 siblings, 1 reply; 2+ messages in thread
From: Vasiliy Kulikov @ 2011-02-10 17:59 UTC (permalink / raw)
To: linux-kernel
Cc: security, Marcel Holtmann, Gustavo F. Padovan, David S. Miller,
linux-bluetooth, netdev
Structure l2cap_options has one padding byte between max_tx and
txwin_size fields. This byte in "opts" is copied to userspace
uninitialized.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
---
Compile tested only.
net/bluetooth/l2cap_sock.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index adf4169..21f5385 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -392,6 +392,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us
switch (optname) {
case L2CAP_OPTIONS:
+ memset(&opts, 0, sizeof(opts));
opts.imtu = l2cap_pi(sk)->imtu;
opts.omtu = l2cap_pi(sk)->omtu;
opts.flush_to = l2cap_pi(sk)->flush_to;
--
1.7.0.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] bluetooth: l2cap: fix 1 byte infoleak to userspace
2011-02-10 17:59 [PATCH] bluetooth: l2cap: fix 1 byte infoleak to userspace Vasiliy Kulikov
@ 2011-02-10 18:11 ` Gustavo F. Padovan
0 siblings, 0 replies; 2+ messages in thread
From: Gustavo F. Padovan @ 2011-02-10 18:11 UTC (permalink / raw)
To: Vasiliy Kulikov
Cc: linux-kernel, security, Marcel Holtmann, David S. Miller,
linux-bluetooth, netdev
Hi Vasiliy,
* Vasiliy Kulikov <segoon@openwall.com> [2011-02-10 20:59:42 +0300]:
> Structure l2cap_options has one padding byte between max_tx and
> txwin_size fields. This byte in "opts" is copied to userspace
> uninitialized.
>
> Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
> ---
> Compile tested only.
>
> net/bluetooth/l2cap_sock.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
Patch has been applied, thanks.
--
Gustavo F. Padovan
http://profusion.mobi
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