packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface

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[ Upstream commit 309cf37fe2 ]

Because we miss to wipe the remainder of i->addr[] in packet_mc_add(),
pdiag_put_mclist() leaks uninitialized heap bytes via the
PACKET_DIAG_MCLIST netlink attribute.

Fix this by explicitly memset(0)ing the remaining bytes in i->addr[].

Fixes: eea68e2f1a ("packet: Report socket mclist info via diag module")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mathias Krause 2016-04-10 12:52:28 +02:00 • committed by Greg Kroah-Hartman

parent d0bfda58b4

commit a416c9483c

1 changed files with 1 additions and 0 deletions

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net/packet/af_packet.c

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