Revert "CRED: Fix regression in cap_capable() as shown up by sys_faccessat() [ver #2]"

This reverts commit 14eaddc967b16017d4a1a24d2be6c28ecbe06ed8.

David has a better version to come.

1 files changed, 6 insertions, 20 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index eb6c45107a0..df30a7555d8 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1433,13 +1433,12 @@ static int current_has_perm(const struct task_struct *tsk,
 
 /* Check whether a task is allowed to use a capability. */
 static int task_has_capability(struct task_struct *tsk,
-                               const struct cred *cred,
                                int cap, int audit)
 {
         struct avc_audit_data ad;
         struct av_decision avd;
         u16 sclass;
-        u32 sid = cred_sid(cred);
+        u32 sid = task_sid(tsk);
         u32 av = CAP_TO_MASK(cap);
         int rc;
 
@@ -1866,27 +1865,15 @@ static int selinux_capset(struct cred *new, const struct cred *old,
         return cred_has_perm(old, new, PROCESS__SETCAP);
 }
 
-static int selinux_capable(int cap, int audit)
-{
-        int rc;
-
-        rc = secondary_ops->capable(cap, audit);
-        if (rc)
-                return rc;
-
-        return task_has_capability(current, current_cred(), cap, audit);
-}
-
-static int selinux_task_capable(struct task_struct *tsk,
-                                const struct cred *cred, int cap, int audit)
+static int selinux_capable(struct task_struct *tsk, int cap, int audit)
 {
         int rc;
 
-        rc = secondary_ops->task_capable(tsk, cred, cap, audit);
+        rc = secondary_ops->capable(tsk, cap, audit);
         if (rc)
                 return rc;
 
-        return task_has_capability(tsk, cred, cap, audit);
+        return task_has_capability(tsk, cap, audit);
 }
 
 static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
@@ -2050,7 +2037,7 @@ static int selinux_vm_enough_memory(struct mm_struct *mm, long pages)
 {
         int rc, cap_sys_admin = 0;
 
-        rc = selinux_capable(CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT);
+        rc = selinux_capable(current, CAP_SYS_ADMIN, SECURITY_CAP_NOAUDIT);
         if (rc == 0)
                 cap_sys_admin = 1;
 
@@ -2893,7 +2880,7 @@ static int selinux_inode_getsecurity(const struct inode *inode, const char *name
          * and lack of permission just means that we fall back to the
          * in-core context value, not a denial.
          */
-        error = selinux_capable(CAP_MAC_ADMIN, SECURITY_CAP_NOAUDIT);
+        error = selinux_capable(current, CAP_MAC_ADMIN, SECURITY_CAP_NOAUDIT);
         if (!error)
                 error = security_sid_to_context_force(isec->sid, &context,
                                                       &size);
@@ -5581,7 +5568,6 @@ static struct security_operations selinux_ops = {
         .capset =                       selinux_capset,
         .sysctl =                       selinux_sysctl,
         .capable =                      selinux_capable,
-        .task_capable =                 selinux_task_capable,
         .quotactl =                     selinux_quotactl,
         .quota_on =                     selinux_quota_on,
         .syslog =                       selinux_syslog,