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-rw-r--r--security/selinux/hooks.c74
1 files changed, 42 insertions, 32 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 520b9998123e..3c3fff33d1ce 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -47,7 +47,7 @@
#include <linux/netfilter_ipv6.h>
#include <linux/tty.h>
#include <net/icmp.h>
-#include <net/ip.h> /* for sysctl_local_port_range[] */
+#include <net/ip.h> /* for local_port_range[] */
#include <net/tcp.h> /* struct or_callable used in sock_rcv_skb */
#include <asm/uaccess.h>
#include <asm/ioctls.h>
@@ -316,6 +316,7 @@ static inline int inode_doinit(struct inode *inode)
}
enum {
+ Opt_error = -1,
Opt_context = 1,
Opt_fscontext = 2,
Opt_defcontext = 4,
@@ -327,6 +328,7 @@ static match_table_t tokens = {
{Opt_fscontext, "fscontext=%s"},
{Opt_defcontext, "defcontext=%s"},
{Opt_rootcontext, "rootcontext=%s"},
+ {Opt_error, NULL},
};
#define SEL_MOUNT_FAIL_MSG "SELinux: duplicate or incompatible mount options\n"
@@ -1584,7 +1586,7 @@ static int selinux_syslog(int type)
* Do not audit the selinux permission check, as this is applied to all
* processes that allocate mappings.
*/
-static int selinux_vm_enough_memory(long pages)
+static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
{
int rc, cap_sys_admin = 0;
struct task_security_struct *tsec = current->security;
@@ -1600,7 +1602,7 @@ static int selinux_vm_enough_memory(long pages)
if (rc == 0)
cap_sys_admin = 1;
- return __vm_enough_memory(pages, cap_sys_admin);
+ return __vm_enough_memory(mm, pages, cap_sys_admin);
}
/* binprm security operations */
@@ -1907,6 +1909,9 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
spin_unlock_irq(&current->sighand->siglock);
}
+ /* Always clear parent death signal on SID transitions. */
+ current->pdeath_signal = 0;
+
/* Check whether the new SID can inherit resource limits
from the old SID. If not, reset all soft limits to
the lower of the current task's hard limit and the init
@@ -3129,17 +3134,19 @@ static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
/**
* selinux_skb_extlbl_sid - Determine the external label of a packet
* @skb: the packet
- * @base_sid: the SELinux SID to use as a context for MLS only external labels
* @sid: the packet's SID
*
* Description:
* Check the various different forms of external packet labeling and determine
- * the external SID for the packet.
+ * the external SID for the packet. If only one form of external labeling is
+ * present then it is used, if both labeled IPsec and NetLabel labels are
+ * present then the SELinux type information is taken from the labeled IPsec
+ * SA and the MLS sensitivity label information is taken from the NetLabel
+ * security attributes. This bit of "magic" is done in the call to
+ * selinux_netlbl_skbuff_getsid().
*
*/
-static void selinux_skb_extlbl_sid(struct sk_buff *skb,
- u32 base_sid,
- u32 *sid)
+static void selinux_skb_extlbl_sid(struct sk_buff *skb, u32 *sid)
{
u32 xfrm_sid;
u32 nlbl_sid;
@@ -3147,10 +3154,9 @@ static void selinux_skb_extlbl_sid(struct sk_buff *skb,
selinux_skb_xfrm_sid(skb, &xfrm_sid);
if (selinux_netlbl_skbuff_getsid(skb,
(xfrm_sid == SECSID_NULL ?
- base_sid : xfrm_sid),
+ SECINITSID_NETMSG : xfrm_sid),
&nlbl_sid) != 0)
nlbl_sid = SECSID_NULL;
-
*sid = (nlbl_sid == SECSID_NULL ? xfrm_sid : nlbl_sid);
}
@@ -3226,8 +3232,6 @@ static int selinux_socket_post_create(struct socket *sock, int family,
/* Range of port numbers used to automatically bind.
Need to determine whether we should perform a name_bind
permission check between the socket and the port number. */
-#define ip_local_port_range_0 sysctl_local_port_range[0]
-#define ip_local_port_range_1 sysctl_local_port_range[1]
static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
{
@@ -3270,20 +3274,27 @@ static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, in
addrp = (char *)&addr6->sin6_addr.s6_addr;
}
- if (snum&&(snum < max(PROT_SOCK,ip_local_port_range_0) ||
- snum > ip_local_port_range_1)) {
- err = security_port_sid(sk->sk_family, sk->sk_type,
- sk->sk_protocol, snum, &sid);
- if (err)
- goto out;
- AVC_AUDIT_DATA_INIT(&ad,NET);
- ad.u.net.sport = htons(snum);
- ad.u.net.family = family;
- err = avc_has_perm(isec->sid, sid,
- isec->sclass,
- SOCKET__NAME_BIND, &ad);
- if (err)
- goto out;
+ if (snum) {
+ int low, high;
+
+ inet_get_local_port_range(&low, &high);
+
+ if (snum < max(PROT_SOCK, low) || snum > high) {
+ err = security_port_sid(sk->sk_family,
+ sk->sk_type,
+ sk->sk_protocol, snum,
+ &sid);
+ if (err)
+ goto out;
+ AVC_AUDIT_DATA_INIT(&ad,NET);
+ ad.u.net.sport = htons(snum);
+ ad.u.net.family = family;
+ err = avc_has_perm(isec->sid, sid,
+ isec->sclass,
+ SOCKET__NAME_BIND, &ad);
+ if (err)
+ goto out;
+ }
}
switch(isec->sclass) {
@@ -3695,7 +3706,7 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *
if (sock && sock->sk->sk_family == PF_UNIX)
selinux_get_inode_sid(SOCK_INODE(sock), &peer_secid);
else if (skb)
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peer_secid);
+ selinux_skb_extlbl_sid(skb, &peer_secid);
if (peer_secid == SECSID_NULL)
err = -EINVAL;
@@ -3756,7 +3767,7 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
u32 newsid;
u32 peersid;
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &peersid);
+ selinux_skb_extlbl_sid(skb, &peersid);
if (peersid == SECSID_NULL) {
req->secid = sksec->sid;
req->peer_secid = SECSID_NULL;
@@ -3794,7 +3805,7 @@ static void selinux_inet_conn_established(struct sock *sk,
{
struct sk_security_struct *sksec = sk->sk_security;
- selinux_skb_extlbl_sid(skb, SECINITSID_UNLABELED, &sksec->peer_sid);
+ selinux_skb_extlbl_sid(skb, &sksec->peer_sid);
}
static void selinux_req_classify_flow(const struct request_sock *req,
@@ -4657,8 +4668,7 @@ static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
static void selinux_release_secctx(char *secdata, u32 seclen)
{
- if (secdata)
- kfree(secdata);
+ kfree(secdata);
}
#ifdef CONFIG_KEYS
@@ -4912,7 +4922,7 @@ static __init int selinux_init(void)
sel_inode_cache = kmem_cache_create("selinux_inode_security",
sizeof(struct inode_security_struct),
- 0, SLAB_PANIC, NULL, NULL);
+ 0, SLAB_PANIC, NULL);
avc_init();
original_ops = secondary_ops = security_ops;
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-03 18:51:18 +0100