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netfilter: nf_tables: validate NFTA_SET_TABLE parameter

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If the NFTA_SET_TABLE parameter is missing and the NLM_F_DUMP flag is
not set, then a NULL pointer dereference is triggered in
nf_tables_set_lookup because ctx.table is NULL.

Signed-off-by: Phil Turnbull <phil.turnbull@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Phil Turnbull 2016-05-27 13:34:04 -04:00 committed by Pablo Neira Ayuso
parent 83170f3bec
commit eaa2bcd6d1
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/nf_tables_api.c
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@ -2641,6 +2641,8 @@ static int nf_tables_getset(struct net *net, struct sock *nlsk,
/* Only accept unspec with dump */
if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
return -EAFNOSUPPORT;
if (!nla[NFTA_SET_TABLE])
return -EINVAL;
set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]);
if (IS_ERR(set))