LSM: remove the task field from common_audit_data

There are no legitimate users.  Always use current and get back some stack
space for the common_audit_data.

Signed-off-by: Eric Paris <eparis@redhat.com>

3 files changed, 2 insertions, 8 deletions

diff --git a/include/linux/lsm_audit.h b/include/linux/lsm_audit.h
index 9e1ebf5851b8..75368c1aac78 100644
--- a/include/linux/lsm_audit.h
+++ b/include/linux/lsm_audit.h
@@ -53,7 +53,6 @@ struct common_audit_data {
 #define LSM_AUDIT_DATA_KMOD     8
 #define LSM_AUDIT_DATA_INODE    9
 #define LSM_AUDIT_DATA_DENTRY   10
-        struct task_struct *tsk;
         union   {
                 struct path path;
                 struct dentry *dentry;
diff --git a/security/lsm_audit.c b/security/lsm_audit.c
index 90c129b0102f..e796d2517653 100644
--- a/security/lsm_audit.c
+++ b/security/lsm_audit.c
@@ -213,12 +213,8 @@ static void dump_common_audit_data(struct audit_buffer *ab,
 {
         struct task_struct *tsk = current;
 
-        if (a->tsk)
-                tsk = a->tsk;
-        if (tsk && tsk->pid) {
-                audit_log_format(ab, " pid=%d comm=", tsk->pid);
-                audit_log_untrustedstring(ab, tsk->comm);
-        }
+        audit_log_format(ab, " pid=%d comm=", tsk->pid);
+        audit_log_untrustedstring(ab, tsk->comm);
 
         switch (a->type) {
         case LSM_AUDIT_DATA_NONE:
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9f0384493009..d79762946c6e 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1429,7 +1429,6 @@ static int cred_has_capability(const struct cred *cred,
 
         COMMON_AUDIT_DATA_INIT(&ad, LSM_AUDIT_DATA_CAP);
         ad.selinux_audit_data = &sad;
-        ad.tsk = current;
         ad.u.cap = cap;
 
         switch (CAP_TO_INDEX(cap)) {