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Message-Id: <1297680867-11551-1-git-send-email-segoon@openwall.com> Date: Mon, 14 Feb 2011 13:54:26 +0300 From: Vasiliy Kulikov <segoon@...nwall.com> To: linux-kernel@...r.kernel.org Cc: security@...nel.org, Marcel Holtmann <marcel@...tmann.org>, "Gustavo F. Padovan" <padovan@...fusion.mobi>, "David S. Miller" <davem@...emloft.net>, linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH] bluethooth: sco: fix information leak to userspace 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@...nwall.com> --- Compile tested. net/bluetooth/sco.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 960c6d1..926ed39 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -703,6 +703,7 @@ 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); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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