tree 0de3c2e5837660745019af3c67e19249105b86c3
parent b6a930fa88083b41d26ddf1cab95cbd740936c22
author Guillaume Nault <g.nault@alphalink.fr> 1524492914 +0200
committer David S. Miller <davem@davemloft.net> 1524532243 -0400

l2tp: check sockaddr length in pppol2tp_connect()

Check sockaddr_len before dereferencing sp->sa_protocol, to ensure that
it actually points to valid data.

Fixes: fd558d186df2 ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Reported-by: syzbot+a70ac890b23b1bf29f5c@syzkaller.appspotmail.com
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>