l2tp: check sockaddr length in pppol2tp_connect()

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commit eb1c28c058 upstream.

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

Fixes: fd558d186d ("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: Ben Hutchings <ben@decadent.org.uk>

...

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Guillaume Nault 2018-04-23 16:15:14 +02:00 • committed by Ben Hutchings

parent 0306778621

commit 8439b2c53e

1 changed files with 7 additions and 0 deletions

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net/l2tp/l2tp_ppp.c

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