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| author | Darrel Goeddel <dgoeddel@trustedcs.com> | 2006-06-27 13:26:11 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-29 16:57:55 -0700 |
| commit | c7bdb545d23026b18be53289fd866d1ac07f5f8c (patch) | |
| tree | 6d9a218871d88f7579dd53f14692df2529b6e712 /security | |
| parent | 576a30eb6453439b3c37ba24455ac7090c247b5a (diff) | |
| download | linux-c7bdb545d23026b18be53289fd866d1ac07f5f8c.tar.gz linux-c7bdb545d23026b18be53289fd866d1ac07f5f8c.tar.bz2 linux-c7bdb545d23026b18be53289fd866d1ac07f5f8c.zip | |
[NETLINK]: Encapsulate eff_cap usage within security framework.
This patch encapsulates the usage of eff_cap (in netlink_skb_params) within
the security framework by extending security_netlink_recv to include a required
capability parameter and converting all direct usage of eff_caps outside
of the lsm modules to use the interface. It also updates the SELinux
implementation of the security_netlink_send and security_netlink_recv
hooks to take advantage of the sid in the netlink_skb_params struct.
This also enables SELinux to perform auditing of netlink capability checks.
Please apply, for 2.6.18 if possible.
Signed-off-by: Darrel Goeddel <dgoeddel@trustedcs.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security')
| -rw-r--r-- | security/commoncap.c | 4 | ||||
| -rw-r--r-- | security/dummy.c | 4 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 26 |
3 files changed, 17 insertions, 17 deletions
diff --git a/security/commoncap.c b/security/commoncap.c index 841eb4e5c62b..57673ee07ceb 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -33,9 +33,9 @@ int cap_netlink_send(struct sock *sk, struct sk_buff *skb) EXPORT_SYMBOL(cap_netlink_send); -int cap_netlink_recv(struct sk_buff *skb) +int cap_netlink_recv(struct sk_buff *skb, int cap) { - if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) + if (!cap_raised(NETLINK_CB(skb).eff_cap, cap)) return -EPERM; return 0; } diff --git a/security/dummy.c b/security/dummy.c index 310fcdf7b749..913540808577 100644 --- a/security/dummy.c +++ b/security/dummy.c @@ -675,9 +675,9 @@ static int dummy_netlink_send (struct sock *sk, struct sk_buff *skb) return 0; } -static int dummy_netlink_recv (struct sk_buff *skb) +static int dummy_netlink_recv (struct sk_buff *skb, int cap) { - if (!cap_raised (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN)) + if (!cap_raised (NETLINK_CB (skb).eff_cap, cap)) return -EPERM; return 0; } diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 28832e689800..b6c378dd4f12 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3641,32 +3641,32 @@ static unsigned int selinux_ipv6_postroute_last(unsigned int hooknum, static int selinux_netlink_send(struct sock *sk, struct sk_buff *skb) { - struct task_security_struct *tsec; - struct av_decision avd; int err; err = secondary_ops->netlink_send(sk, skb); if (err) return err; - tsec = current->security; - - avd.allowed = 0; - avc_has_perm_noaudit(tsec->sid, tsec->sid, - SECCLASS_CAPABILITY, ~0, &avd); - cap_mask(NETLINK_CB(skb).eff_cap, avd.allowed); - if (policydb_loaded_version >= POLICYDB_VERSION_NLCLASS) err = selinux_nlmsg_perm(sk, skb); return err; } -static int selinux_netlink_recv(struct sk_buff *skb) +static int selinux_netlink_recv(struct sk_buff *skb, int capability) { - if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) - return -EPERM; - return 0; + int err; + struct avc_audit_data ad; + + err = secondary_ops->netlink_recv(skb, capability); + if (err) + return err; + + AVC_AUDIT_DATA_INIT(&ad, CAP); + ad.u.cap = capability; + + return avc_has_perm(NETLINK_CB(skb).sid, NETLINK_CB(skb).sid, + SECCLASS_CAPABILITY, CAP_TO_MASK(capability), &ad); } static int ipc_alloc_security(struct task_struct *task, |