Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

Pull security layer updates from James Morris:
 "Changes for this kernel include maintenance updates for Smack, SELinux
  (and several networking fixes), IMA and TPM"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (39 commits)
  SELinux: Fix memory leak upon loading policy
  tpm/tpm-sysfs: active_show() can be static
  tpm: tpm_tis: Fix compile problems with CONFIG_PM_SLEEP/CONFIG_PNP
  tpm: Make tpm-dev allocate a per-file structure
  tpm: Use the ops structure instead of a copy in tpm_vendor_specific
  tpm: Create a tpm_class_ops structure and use it in the drivers
  tpm: Pull all driver sysfs code into tpm-sysfs.c
  tpm: Move sysfs functions from tpm-interface to tpm-sysfs
  tpm: Pull everything related to /dev/tpmX into tpm-dev.c
  char: tpm: nuvoton: remove unused variable
  tpm: MAINTAINERS: Cleanup TPM Maintainers file
  tpm/tpm_i2c_atmel: fix coccinelle warnings
  tpm/tpm_ibmvtpm: fix unreachable code warning (smatch warning)
  tpm/tpm_i2c_stm_st33: Check return code of get_burstcount
  tpm/tpm_ppi: Check return value of acpi_get_name
  tpm/tpm_ppi: Do not compare strcmp(a,b) == -1
  ima: remove unneeded size_limit argument from ima_eventdigest_init_common()
  ima: update IMA-templates.txt documentation
  ima: pass HASH_ALGO__LAST as hash algo in ima_eventdigest_init()
  ima: change the default hash algorithm to SHA1 in ima_eventdigest_ng_init()
  ...

1 files changed, 30 insertions, 1 deletions

diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 6235d05..0364120 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -101,6 +101,32 @@ static struct netlbl_lsm_secattr *selinux_netlbl_sock_genattr(struct sock *sk)
 }
 
 /**
+ * selinux_netlbl_sock_getattr - Get the cached NetLabel secattr
+ * @sk: the socket
+ * @sid: the SID
+ *
+ * Query the socket's cached secattr and if the SID matches the cached value
+ * return the cache, otherwise return NULL.
+ *
+ */
+static struct netlbl_lsm_secattr *selinux_netlbl_sock_getattr(
+							const struct sock *sk,
+							u32 sid)
+{
+	struct sk_security_struct *sksec = sk->sk_security;
+	struct netlbl_lsm_secattr *secattr = sksec->nlbl_secattr;
+
+	if (secattr == NULL)
+		return NULL;
+
+	if ((secattr->flags & NETLBL_SECATTR_SECID) &&
+	    (secattr->attr.secid == sid))
+		return secattr;
+
+	return NULL;
+}
+
+/**
  * selinux_netlbl_cache_invalidate - Invalidate the NetLabel cache
  *
  * Description:
@@ -224,7 +250,7 @@ int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
 		struct sk_security_struct *sksec = sk->sk_security;
 		if (sksec->nlbl_state != NLBL_REQSKB)
 			return 0;
-		secattr = sksec->nlbl_secattr;
+		secattr = selinux_netlbl_sock_getattr(sk, sid);
 	}
 	if (secattr == NULL) {
 		secattr = &secattr_storage;
@@ -410,6 +436,9 @@ int selinux_netlbl_socket_setsockopt(struct socket *sock,
 	     sksec->nlbl_state == NLBL_CONNLABELED)) {
 		netlbl_secattr_init(&secattr);
 		lock_sock(sk);
+		/* call the netlabel function directly as we want to see the
+		 * on-the-wire label that is assigned via the socket's options
+		 * and not the cached netlabel/lsm attributes */
 		rc = netlbl_sock_getattr(sk, &secattr);
 		release_sock(sk);
 		if (rc == 0)