tree ab6db419604880f6a732256c543be5adfbd2a2d9
parent eb1c28c05894a4b1f6b56c5bf072205e64cfa280
author Guillaume Nault <g.nault@alphalink.fr> 1524494307 +0200
committer David S. Miller <davem@davemloft.net> 1524532335 -0400

pppoe: check sockaddr length in pppoe_connect()

We must validate sockaddr_len, otherwise userspace can pass fewer data
than we expect and we end up accessing invalid data.

Fixes: 224cf5ad14c0 ("ppp: Move the PPP drivers")
Reported-by: syzbot+4f03bdf92fdf9ef5ddab@syzkaller.appspotmail.com
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>