diff options
| author | Harald Welte <laforge@netfilter.org> | 2005-11-14 15:24:59 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-11-14 15:24:59 -0800 |
| commit | 37d2e7a20d745035b600f1a6be56cbb9c7259419 (patch) | |
| tree | c76e0ba522d34c8b3021bf0f012632f7877f5281 /net/netfilter/nfnetlink.c | |
| parent | 3746a2b1402e7933c7f1eabdce384b8454dc2ef7 (diff) | |
[NETFILTER] nfnetlink: unconditionally require CAP_NET_ADMIN
This patch unconditionally requires CAP_NET_ADMIN for all nfnetlink
messages. It also removes the per-message cap_required field, since all
existing subsystems use CAP_NET_ADMIN for all their messages anyway.
Patrick McHardy owes me a beer if we ever need to re-introduce this.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/nfnetlink.c')
| -rw-r--r-- | net/netfilter/nfnetlink.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index 83f4c53030f..a60c59b9763 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -223,6 +223,12 @@ static inline int nfnetlink_rcv_msg(struct sk_buff *skb, NFNL_SUBSYS_ID(nlh->nlmsg_type), NFNL_MSG_TYPE(nlh->nlmsg_type)); + if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) { + DEBUGP("missing CAP_NET_ADMIN\n"); + *errp = -EPERM; + return -1; + } + /* Only requests are handled by kernel now. */ if (!(nlh->nlmsg_flags & NLM_F_REQUEST)) { DEBUGP("received non-request message\n"); @@ -240,15 +246,12 @@ static inline int nfnetlink_rcv_msg(struct sk_buff *skb, ss = nfnetlink_get_subsys(type); if (!ss) { #ifdef CONFIG_KMOD - if (cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) { - /* don't call nfnl_shunlock, since it would reenter - * with further packet processing */ - up(&nfnl_sem); - request_module("nfnetlink-subsys-%d", - NFNL_SUBSYS_ID(type)); - nfnl_shlock(); - ss = nfnetlink_get_subsys(type); - } + /* don't call nfnl_shunlock, since it would reenter + * with further packet processing */ + up(&nfnl_sem); + request_module("nfnetlink-subsys-%d", NFNL_SUBSYS_ID(type)); + nfnl_shlock(); + ss = nfnetlink_get_subsys(type); if (!ss) #endif goto err_inval; @@ -260,13 +263,6 @@ static inline int nfnetlink_rcv_msg(struct sk_buff *skb, goto err_inval; } - if (nc->cap_required && - !cap_raised(NETLINK_CB(skb).eff_cap, nc->cap_required)) { - DEBUGP("permission denied for type %d\n", type); - *errp = -EPERM; - return -1; - } - { u_int16_t attr_count = ss->cb[NFNL_MSG_TYPE(nlh->nlmsg_type)].attr_count; |