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sctp: check addr_size with sa_family_t size in __sctp_setsockopt_connectx

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Now __sctp_connect() is called by __sctp_setsockopt_connectx() and
sctp_inet_connect(), the latter has done addr_size check with size
of sa_family_t.

In the next patch to clean up __sctp_connect(), we will remove
addr_size check with size of sa_family_t from __sctp_connect()
for the 1st address.

So before doing that, __sctp_setsockopt_connectx() should do
this check first, as sctp_inet_connect() does.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2019-07-30 20:38:20 +08:00 committed by David S. Miller
parent 4c31bc6b1e
commit f40f1177c3
1 changed files with 2 additions and 1 deletions
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3
net/sctp/socket.c
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@ -1311,7 +1311,8 @@ static int __sctp_setsockopt_connectx(struct sock *sk,
pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
__func__, sk, addrs, addrs_size);
if (unlikely(addrs_size <= 0))
/* make sure the 1st addr's sa_family is accessible later */
if (unlikely(addrs_size < sizeof(sa_family_t)))
return -EINVAL;
kaddrs = memdup_user(addrs, addrs_size);