diff options
| author | Cong Wang <xiyou.wangcong@gmail.com> | 2017-11-27 11:15:16 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:03:35 +0100 |
| commit | 40cda9b7bac5e863d9b968339dd8d5287a267a47 (patch) | |
| tree | a2f4b8906c152f02547d2506b3e7787bdfcd9cc6 /net | |
| parent | 7800c76fb039e3d88cbdae49e3e1a47098e71111 (diff) | |
xfrm: check id proto in validate_tmpl()
commit 6a53b7593233ab9e4f96873ebacc0f653a55c3e1 upstream.
syzbot reported a kernel warning in xfrm_state_fini(), which
indicates that we have entries left in the list
net->xfrm.state_all whose proto is zero. And
xfrm_id_proto_match() doesn't consider them as a match with
IPSEC_PROTO_ANY in this case.
Proto with value 0 is probably not a valid value, at least
verify_newsa_info() doesn't consider it valid either.
This patch fixes it by checking the proto value in
validate_tmpl() and rejecting invalid ones, like what iproute2
does in xfrm_xfrmproto_getbyname().
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 76944a4839a5..41ab1bbdd293 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1402,6 +1402,21 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) default: return -EINVAL; } + + switch (ut[i].id.proto) { + case IPPROTO_AH: + case IPPROTO_ESP: + case IPPROTO_COMP: +#if IS_ENABLED(CONFIG_IPV6) + case IPPROTO_ROUTING: + case IPPROTO_DSTOPTS: +#endif + case IPSEC_PROTO_ANY: + break; + default: + return -EINVAL; + } + } return 0; |