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sctp: Fix a big endian bug in sctp_diag_dump()

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The sctp_for_each_transport() function takes an pointer to int.  The
cb->args[] array holds longs so it's only using the high 32 bits.  It
works on little endian system but will break on big endian 64 bit
machines.

Fixes: d25adbeb0c ("sctp: fix an use-after-free issue in sctp_sock_dump")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2017-09-25 13:19:26 +03:00 committed by David S. Miller
parent 20c62c797e
commit c2cc187e53
1 changed files with 3 additions and 1 deletions
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4
net/sctp/sctp_diag.c
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@ -463,6 +463,7 @@ static void sctp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
.r = r,
.net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN),
};
int pos = cb->args[2];
/* eps hashtable dumps
* args:
@ -493,7 +494,8 @@ skip:
goto done;
sctp_for_each_transport(sctp_sock_filter, sctp_sock_dump,
net, (int *)&cb->args[2], &commp);
net, &pos, &commp);
cb->args[2] = pos;
done:
cb->args[1] = cb->args[4];