This is a note to let you know that I've just added the patch titled
packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
packet-fix-heap-info-leak-in-packet_diag_mclist-sock_diag-interface.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon May 16 14:28:53 PDT 2016
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Date: Sun, 10 Apr 2016 12:52:28 +0200
Subject: packet: fix heap info leak in PACKET_DIAG_MCLIST sock_diag interface
Status: RO
Content-Length: 1163
Lines: 33
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
[ Upstream commit 309cf37fe2a781279b7675d4bb7173198e532867 ]
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: eea68e2f1a00 ("packet: Report socket mclist info via diag module")
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Acked-by: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/packet/af_packet.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3153,6 +3153,7 @@ static int packet_mc_add(struct sock *sk
i->ifindex = mreq->mr_ifindex;
i->alen = mreq->mr_alen;
memcpy(i->addr, mreq->mr_address, i->alen);
+ memset(i->addr + i->alen, 0, sizeof(i->addr) - i->alen);
i->count = 1;
i->next = po->mclist;
po->mclist = i;
Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are
queue-3.14/packet-fix-heap-info-leak-in-packet_diag_mclist-sock_diag-interface.patch
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