Merge tag 'selinux-pr-20210923' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux

Pull SELinux/Smack fixes from Paul Moore:
 "Another single-patch pull request for SELinux, as well as Smack.

  This fixes some credential misuse and is explained reasonably well in
  the patch description"

* tag 'selinux-pr-20210923' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux,smack: fix subjective/objective credential use mixups

Author: torvalds

security/selinux/hooks.c

@@ -2157,7 +2157,7 @@ static int selinux_ptrace_access_check(struct task_struct *child,
 static int selinux_ptrace_traceme(struct task_struct *parent)
 {
 	return avc_has_perm(&selinux_state,
-			    task_sid_subj(parent), task_sid_obj(current),
+			    task_sid_obj(parent), task_sid_obj(current),
 			    SECCLASS_PROCESS, PROCESS__PTRACE, NULL);
 }
 
@@ -6222,7 +6222,7 @@ static int selinux_msg_queue_msgrcv(struct kern_ipc_perm *msq, struct msg_msg *m
 	struct ipc_security_struct *isec;
 	struct msg_security_struct *msec;
 	struct common_audit_data ad;
-	u32 sid = task_sid_subj(target);
+	u32 sid = task_sid_obj(target);
 	int rc;
 
 	isec = selinux_ipc(msq);

security/smack/smack_lsm.c

@@ -2016,7 +2016,7 @@ static int smk_curacc_on_task(struct task_struct *p, int access,
 				const char *caller)
 {
 	struct smk_audit_info ad;
-	struct smack_known *skp = smk_of_task_struct_subj(p);
+	struct smack_known *skp = smk_of_task_struct_obj(p);
 	int rc;
 
 	smk_ad_init(&ad, caller, LSM_AUDIT_DATA_TASK);
@@ -3480,7 +3480,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
  */
 static int smack_getprocattr(struct task_struct *p, char *name, char **value)
 {
-	struct smack_known *skp = smk_of_task_struct_subj(p);
+	struct smack_known *skp = smk_of_task_struct_obj(p);
 	char *cp;
 	int slen;