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atm: fix info leak in getsockopt(SO_ATMPVC)

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[ Upstream commit e862f1a9b7 ]

The ATM code fails to initialize the two padding bytes of struct
sockaddr_atmpvc inserted for alignment. Add an explicit memset(0)
before filling the structure to avoid the info leak.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Krause 2012-08-15 11:31:44 +00:00 committed by Greg Kroah-Hartman
parent f9b6caca04
commit 9a897ce370
1 changed files with 1 additions and 0 deletions
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net/atm/common.c
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@ -784,6 +784,7 @@ int vcc_getsockopt(struct socket *sock, int level, int optname,
if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags))
return -ENOTCONN;
memset(&pvc, 0, sizeof(pvc));
pvc.sap_family = AF_ATMPVC;
pvc.sap_addr.itf = vcc->dev->number;
pvc.sap_addr.vpi = vcc->vpi;