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ipsec-2023-03-15 

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Merge tag 'ipsec-2023-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
pull request (net): ipsec 2023-03-15

1) Fix an information leak when dumping algos and encap.
   From Herbert Xu

2) Allow transport-mode states with AF_UNSPEC selector
   to allow for nested transport-mode states.
   From Herbert Xu.

* tag 'ipsec-2023-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
  xfrm: Allow transport-mode states with AF_UNSPEC selector
  xfrm: Zero padding when dumping algos and encap
====================

Link: https://lore.kernel.org/r/20230315105623.1396491-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-03-16 17:23:48 -07:00
parent c782c7f118 c276a706ea
commit 84770d1249
2 changed files with 41 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/xfrm/xfrm_state.c
View File

@ -2815,11 +2815,6 @@ int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload,
goto error;
}
if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
NL_SET_ERR_MSG(extack, "Only tunnel modes can accommodate an AF_UNSPEC selector");
goto error;
}
x->inner_mode = *inner_mode;
if (x->props.family == AF_INET)

45
net/xfrm/xfrm_user.c
View File

@ -1012,7 +1012,9 @@ static int copy_to_user_aead(struct xfrm_algo_aead *aead, struct sk_buff *skb)
return -EMSGSIZE;
ap = nla_data(nla);
memcpy(ap, aead, sizeof(*aead));
strscpy_pad(ap->alg_name, aead->alg_name, sizeof(ap->alg_name));
ap->alg_key_len = aead->alg_key_len;
ap->alg_icv_len = aead->alg_icv_len;
if (redact_secret && aead->alg_key_len)
memset(ap->alg_key, 0, (aead->alg_key_len + 7) / 8);
@ -1032,7 +1034,8 @@ static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
return -EMSGSIZE;
ap = nla_data(nla);
memcpy(ap, ealg, sizeof(*ealg));
strscpy_pad(ap->alg_name, ealg->alg_name, sizeof(ap->alg_name));
ap->alg_key_len = ealg->alg_key_len;
if (redact_secret && ealg->alg_key_len)
memset(ap->alg_key, 0, (ealg->alg_key_len + 7) / 8);
@ -1043,6 +1046,40 @@ static int copy_to_user_ealg(struct xfrm_algo *ealg, struct sk_buff *skb)
return 0;
}
static int copy_to_user_calg(struct xfrm_algo *calg, struct sk_buff *skb)
{
struct nlattr *nla = nla_reserve(skb, XFRMA_ALG_COMP, sizeof(*calg));
struct xfrm_algo *ap;
if (!nla)
return -EMSGSIZE;
ap = nla_data(nla);
strscpy_pad(ap->alg_name, calg->alg_name, sizeof(ap->alg_name));
ap->alg_key_len = 0;
return 0;
}
static int copy_to_user_encap(struct xfrm_encap_tmpl *ep, struct sk_buff *skb)
{
struct nlattr *nla = nla_reserve(skb, XFRMA_ENCAP, sizeof(*ep));
struct xfrm_encap_tmpl *uep;
if (!nla)
return -EMSGSIZE;
uep = nla_data(nla);
memset(uep, 0, sizeof(*uep));
uep->encap_type = ep->encap_type;
uep->encap_sport = ep->encap_sport;
uep->encap_dport = ep->encap_dport;
uep->encap_oa = ep->encap_oa;
return 0;
}
static int xfrm_smark_put(struct sk_buff *skb, struct xfrm_mark *m)
{
int ret = 0;
@ -1098,12 +1135,12 @@ static int copy_to_user_state_extra(struct xfrm_state *x,
goto out;
}
if (x->calg) {
ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
ret = copy_to_user_calg(x->calg, skb);
if (ret)
goto out;
}
if (x->encap) {
ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
ret = copy_to_user_encap(x->encap, skb);
if (ret)
goto out;
}