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author | Ian Wilson <iwilson@brocade.com> | 2015-03-12 09:37:58 +0000 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-03-12 13:07:36 +0100 |
commit | 78146572b9cd20452da47951812f35b1ad4906be (patch) | |
tree | b824681ec5313d56424b617a44b1c60cace8d488 /net/rds/ib.c | |
parent | 4363890079674db7b00cf1bb0e6fa430e846e86b (diff) | |
download | op-kernel-dev-78146572b9cd20452da47951812f35b1ad4906be.zip op-kernel-dev-78146572b9cd20452da47951812f35b1ad4906be.tar.gz |
netfilter: Zero the tuple in nfnl_cthelper_parse_tuple()
nfnl_cthelper_parse_tuple() is called from nfnl_cthelper_new(),
nfnl_cthelper_get() and nfnl_cthelper_del(). In each case they pass
a pointer to an nf_conntrack_tuple data structure local variable:
struct nf_conntrack_tuple tuple;
...
ret = nfnl_cthelper_parse_tuple(&tuple, tb[NFCTH_TUPLE]);
The problem is that this local variable is not initialized, and
nfnl_cthelper_parse_tuple() only initializes two fields: src.l3num and
dst.protonum. This leaves all other fields with undefined values
based on whatever is on the stack:
tuple->src.l3num = ntohs(nla_get_be16(tb[NFCTH_TUPLE_L3PROTONUM]));
tuple->dst.protonum = nla_get_u8(tb[NFCTH_TUPLE_L4PROTONUM]);
The symptom observed was that when the rpc and tns helpers were added
then traffic to port 1536 was being sent to user-space.
Signed-off-by: Ian Wilson <iwilson@brocade.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/rds/ib.c')
0 files changed, 0 insertions, 0 deletions