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authorPablo Neira Ayuso <pablo@netfilter.org>2020-05-24 21:04:42 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2020-05-25 20:39:14 +0200
commit703acd70f2496537457186211c2f03e792409e68 (patch)
tree9a79c2a4a1b4beab6d5a4056a9a6fb0d42da62d8 /net/netfilter
parentee04805ff54a63ffd90bc6749ebfe73473734ddb (diff)
netfilter: nfnetlink_cthelper: unbreak userspace helper support
Restore helper data size initialization and fix memcopy of the helper data size. Fixes: 157ffffeb5dc ("netfilter: nfnetlink_cthelper: reject too large userspace allocation requests") Reviewed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
-rw-r--r--net/netfilter/nfnetlink_cthelper.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index a5f294aa8e4c..5b0d0a77379c 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -103,7 +103,7 @@ nfnl_cthelper_from_nlattr(struct nlattr *attr, struct nf_conn *ct)
if (help->helper->data_len == 0)
return -EINVAL;
- nla_memcpy(help->data, nla_data(attr), sizeof(help->data));
+ nla_memcpy(help->data, attr, sizeof(help->data));
return 0;
}
@@ -240,6 +240,7 @@ nfnl_cthelper_create(const struct nlattr * const tb[],
ret = -ENOMEM;
goto err2;
}
+ helper->data_len = size;
helper->flags |= NF_CT_HELPER_F_USERSPACE;
memcpy(&helper->tuple, tuple, sizeof(struct nf_conntrack_tuple));