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authorCasey Schaufler <casey@schaufler-ca.com>2018-09-21 17:19:45 -0700
committerKees Cook <keescook@chromium.org>2019-01-08 13:18:45 -0800
commit7c6538280ae99eaebd589a5c029e1ed1c063909c (patch)
treedc9151bdc921bb93a0a3be3e06a4e93f570e44c5
parentf4ad8f2c40769b3cc9497ba0883bbaf823f7752f (diff)
downloadlinux-7c6538280ae99eaebd589a5c029e1ed1c063909c.tar.gz
SELinux: Abstract use of ipc security blobs
Don't use the ipc->security pointer directly. Don't use the msg_msg->security pointer directly. Provide helper functions that provides the security blob pointers. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org>
-rw-r--r--security/selinux/hooks.c18
-rw-r--r--security/selinux/include/objsec.h13
2 files changed, 22 insertions, 9 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 23da46cd6e37..4b64ad31326f 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -5678,7 +5678,7 @@ static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
struct common_audit_data ad;
u32 sid = current_sid();
- isec = ipc_perms->security;
+ isec = selinux_ipc(ipc_perms);
ad.type = LSM_AUDIT_DATA_IPC;
ad.u.ipc_id = ipc_perms->key;
@@ -5735,7 +5735,7 @@ static int selinux_msg_queue_associate(struct kern_ipc_perm *msq, int msqflg)
struct common_audit_data ad;
u32 sid = current_sid();
- isec = msq->security;
+ isec = selinux_ipc(msq);
ad.type = LSM_AUDIT_DATA_IPC;
ad.u.ipc_id = msq->key;
@@ -5784,8 +5784,8 @@ static int selinux_msg_queue_msgsnd(struct kern_ipc_perm *msq, struct msg_msg *m
u32 sid = current_sid();
int rc;
- isec = msq->security;
- msec = msg->security;
+ isec = selinux_ipc(msq);
+ msec = selinux_msg_msg(msg);
/*
* First time through, need to assign label to the message
@@ -5832,8 +5832,8 @@ static int selinux_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *m
u32 sid = task_sid(target);
int rc;
- isec = msq->security;
- msec = msg->security;
+ isec = selinux_ipc(msq);
+ msec = selinux_msg_msg(msg);
ad.type = LSM_AUDIT_DATA_IPC;
ad.u.ipc_id = msq->key;
@@ -5886,7 +5886,7 @@ static int selinux_shm_associate(struct kern_ipc_perm *shp, int shmflg)
struct common_audit_data ad;
u32 sid = current_sid();
- isec = shp->security;
+ isec = selinux_ipc(shp);
ad.type = LSM_AUDIT_DATA_IPC;
ad.u.ipc_id = shp->key;
@@ -5983,7 +5983,7 @@ static int selinux_sem_associate(struct kern_ipc_perm *sma, int semflg)
struct common_audit_data ad;
u32 sid = current_sid();
- isec = sma->security;
+ isec = selinux_ipc(sma);
ad.type = LSM_AUDIT_DATA_IPC;
ad.u.ipc_id = sma->key;
@@ -6069,7 +6069,7 @@ static int selinux_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
static void selinux_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
{
- struct ipc_security_struct *isec = ipcp->security;
+ struct ipc_security_struct *isec = selinux_ipc(ipcp);
*secid = isec->sid;
}
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 562fad58c56b..539cacf4a572 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -26,6 +26,7 @@
#include <linux/in.h>
#include <linux/spinlock.h>
#include <linux/lsm_hooks.h>
+#include <linux/msg.h>
#include <net/net_namespace.h>
#include "flask.h"
#include "avc.h"
@@ -175,4 +176,16 @@ static inline struct inode_security_struct *selinux_inode(
return inode->i_security + selinux_blob_sizes.lbs_inode;
}
+static inline struct msg_security_struct *selinux_msg_msg(
+ const struct msg_msg *msg_msg)
+{
+ return msg_msg->security;
+}
+
+static inline struct ipc_security_struct *selinux_ipc(
+ const struct kern_ipc_perm *ipc)
+{
+ return ipc->security;
+}
+
#endif /* _SELINUX_OBJSEC_H_ */