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atm: fix info leak via getsockname()

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[ Upstream commit 3c0c5cfdcd ]

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 11:31:45 +00:00 committed by Greg Kroah-Hartman
parent 5b26dbdd5f
commit 458ed5622e
1 changed files with 1 additions and 0 deletions
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net/atm/pvc.c
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@ -95,6 +95,7 @@ static int pvc_getname(struct socket *sock, struct sockaddr *sockaddr,
return -ENOTCONN; return -ENOTCONN;
*sockaddr_len = sizeof(struct sockaddr_atmpvc); *sockaddr_len = sizeof(struct sockaddr_atmpvc);
addr = (struct sockaddr_atmpvc *)sockaddr; addr = (struct sockaddr_atmpvc *)sockaddr;
memset(addr, 0, sizeof(*addr));
addr->sap_family = AF_ATMPVC; addr->sap_family = AF_ATMPVC;
addr->sap_addr.itf = vcc->dev->number; addr->sap_addr.itf = vcc->dev->number;
addr->sap_addr.vpi = vcc->vpi; addr->sap_addr.vpi = vcc->vpi;