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netlink: test for all flags of the NLM_F_DUMP composite

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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/xfrm/xfrm_user.c
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@@ -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;