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Bluetooth: sco: fix information leak to userspace

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commit c4c896e147 upstream.

struct sco_conninfo has one padding byte in the end.  Local variable
cinfo of type sco_conninfo is copied to userspace with this uninizialized
one byte, leading to old stack contents leak.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vasiliy Kulikov 2011-02-14 13:54:26 +03:00 committed by Greg Kroah-Hartman
parent 91443ec214
commit 1fdae7255c
1 changed files with 1 additions and 0 deletions
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net/bluetooth/sco.c
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@ -700,6 +700,7 @@ static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user
break;
}
memset(&cinfo, 0, sizeof(cinfo));
cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle;
memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3);