git.stricted.de - GitHub/moto-9609/android_kernel_motorola

author	Guillaume Nault <g.nault@alphalink.fr>
	Mon, 23 Apr 2018 14:15:14 +0000 (16:15 +0200)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Sun, 29 Apr 2018 09:33:11 +0000 (11:33 +0200)
commit	dbf57fd1e05efc0d37503af5f08a532aff2c9823
tree	3abd9228346cb126ee798818c411a3c75214ff67	tree \| snapshot (tar.gz zip)
parent	c7a936b1dd0f75727b776479f739236a05317f7b	commit \| diff

l2tp: check sockaddr length in pppol2tp_connect()

[ Upstream commit eb1c28c05894a4b1f6b56c5bf072205e64cfa280 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>