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netlink: test for all flags of the NLM_F_DUMP composite 

Due to NLM_F_DUMP is composed of two bits, NLM_F_ROOT | NLM_F_MATCH,
when doing "if (x & NLM_F_DUMP)", it tests for _either_ of the bits
being set. Because NLM_F_MATCH's value overlaps with NLM_F_EXCL,
non-dump requests with NLM_F_EXCL set are mistaken as dump requests.

Substitute the condition to test for _all_ bits being set.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2011-01-07 03:15:05 +00:00 committed by David S. Miller
parent dba5a68ae1
commit 0ab03c2b14
5 changed files with 6 additions and 6 deletions
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2
net/core/rtnetlink.c
View File

@ -1820,7 +1820,7 @@ static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN))
return -EPERM;
if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
if (kind == 2 && (nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) {
struct sock *rtnl;
rtnl_dumpit_func dumpit;

2
net/ipv4/inet_diag.c
View File

@ -858,7 +858,7 @@ static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
nlmsg_len(nlh) < hdrlen)
return -EINVAL;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
if ((nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) {
if (nlmsg_attrlen(nlh, hdrlen)) {
struct nlattr *attr;

4
net/netfilter/nf_conntrack_netlink.c
View File

@ -928,7 +928,7 @@ ctnetlink_get_conntrack(struct sock *ctnl, struct sk_buff *skb,
u16 zone;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP)
if ((nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP)
return netlink_dump_start(ctnl, skb, nlh, ctnetlink_dump_table,
ctnetlink_done);
@ -1790,7 +1790,7 @@ ctnetlink_get_expect(struct sock *ctnl, struct sk_buff *skb,
u16 zone;
int err;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
if ((nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) {
return netlink_dump_start(ctnl, skb, nlh,
ctnetlink_exp_dump_table,
ctnetlink_exp_done);

2
net/netlink/genetlink.c
View File

@ -519,7 +519,7 @@ static int genl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
security_netlink_recv(skb, CAP_NET_ADMIN))
return -EPERM;
if (nlh->nlmsg_flags & NLM_F_DUMP) {
if ((nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) {
if (ops->dumpit == NULL)
return -EOPNOTSUPP;

2
net/xfrm/xfrm_user.c
View File

@ -2187,7 +2187,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
(nlh->nlmsg_flags & NLM_F_DUMP)) {
(nlh->nlmsg_flags & NLM_F_DUMP) == NLM_F_DUMP) {
if (link->dump == NULL)
return -EINVAL;