diff mbox

[ghak81,V3,2/3] audit: normalize loginuid read access

Message ID a50926963f4527a5273e0688275d1e9361e8d02e.1526430313.git.rgb@redhat.com (mailing list archive)
State Accepted
Headers show

Commit Message

Richard Guy Briggs May 16, 2018, 11:55 a.m. UTC 
Recognizing that the loginuid is an internal audit value, use an access
function to retrieve the audit loginuid value for the task rather than
reaching directly into the task struct to get it.

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
---
 kernel/auditsc.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

Comments

Paul Moore May 17, 2018, 11:02 p.m. UTC | #1 
On Wed, May 16, 2018 at 7:55 AM, Richard Guy Briggs <rgb@redhat.com> wrote:
> Recognizing that the loginuid is an internal audit value, use an access
> function to retrieve the audit loginuid value for the task rather than
> reaching directly into the task struct to get it.
>
> Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> ---
>  kernel/auditsc.c | 24 +++++++++++++++---------
>  1 file changed, 15 insertions(+), 9 deletions(-)

Also merged into audit/next.

> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index f3d3dc6..ef3e189 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -374,7 +374,7 @@ static int audit_field_compare(struct task_struct *tsk,
>         case AUDIT_COMPARE_EGID_TO_OBJ_GID:
>                 return audit_compare_gid(cred->egid, name, f, ctx);
>         case AUDIT_COMPARE_AUID_TO_OBJ_UID:
> -               return audit_compare_uid(tsk->loginuid, name, f, ctx);
> +               return audit_compare_uid(audit_get_loginuid(tsk), name, f, ctx);
>         case AUDIT_COMPARE_SUID_TO_OBJ_UID:
>                 return audit_compare_uid(cred->suid, name, f, ctx);
>         case AUDIT_COMPARE_SGID_TO_OBJ_GID:
> @@ -385,7 +385,8 @@ static int audit_field_compare(struct task_struct *tsk,
>                 return audit_compare_gid(cred->fsgid, name, f, ctx);
>         /* uid comparisons */
>         case AUDIT_COMPARE_UID_TO_AUID:
> -               return audit_uid_comparator(cred->uid, f->op, tsk->loginuid);
> +               return audit_uid_comparator(cred->uid, f->op,
> +                                           audit_get_loginuid(tsk));
>         case AUDIT_COMPARE_UID_TO_EUID:
>                 return audit_uid_comparator(cred->uid, f->op, cred->euid);
>         case AUDIT_COMPARE_UID_TO_SUID:
> @@ -394,11 +395,14 @@ static int audit_field_compare(struct task_struct *tsk,
>                 return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
>         /* auid comparisons */
>         case AUDIT_COMPARE_AUID_TO_EUID:
> -               return audit_uid_comparator(tsk->loginuid, f->op, cred->euid);
> +               return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
> +                                           cred->euid);
>         case AUDIT_COMPARE_AUID_TO_SUID:
> -               return audit_uid_comparator(tsk->loginuid, f->op, cred->suid);
> +               return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
> +                                           cred->suid);
>         case AUDIT_COMPARE_AUID_TO_FSUID:
> -               return audit_uid_comparator(tsk->loginuid, f->op, cred->fsuid);
> +               return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
> +                                           cred->fsuid);
>         /* euid comparisons */
>         case AUDIT_COMPARE_EUID_TO_SUID:
>                 return audit_uid_comparator(cred->euid, f->op, cred->suid);
> @@ -611,7 +615,8 @@ static int audit_filter_rules(struct task_struct *tsk,
>                                 result = match_tree_refs(ctx, rule->tree);
>                         break;
>                 case AUDIT_LOGINUID:
> -                       result = audit_uid_comparator(tsk->loginuid, f->op, f->uid);
> +                       result = audit_uid_comparator(audit_get_loginuid(tsk),
> +                                                     f->op, f->uid);
>                         break;
>                 case AUDIT_LOGINUID_SET:
>                         result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val);
> @@ -2278,14 +2283,15 @@ int audit_signal_info(int sig, struct task_struct *t)
>  {
>         struct audit_aux_data_pids *axp;
>         struct audit_context *ctx = audit_context();
> -       kuid_t uid = current_uid(), t_uid = task_uid(t);
> +       kuid_t uid = current_uid(), auid, t_uid = task_uid(t);
>
>         if (auditd_test_task(t) &&
>             (sig == SIGTERM || sig == SIGHUP ||
>              sig == SIGUSR1 || sig == SIGUSR2)) {
>                 audit_sig_pid = task_tgid_nr(current);
> -               if (uid_valid(current->loginuid))
> -                       audit_sig_uid = current->loginuid;
> +               auid = audit_get_loginuid(current);
> +               if (uid_valid(auid))
> +                       audit_sig_uid = auid;
>                 else
>                         audit_sig_uid = uid;
>                 security_task_getsecid(current, &audit_sig_sid);
> --
> 1.8.3.1
>
diff mbox

Patch

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index f3d3dc6..ef3e189 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -374,7 +374,7 @@  static int audit_field_compare(struct task_struct *tsk,
 	case AUDIT_COMPARE_EGID_TO_OBJ_GID:
 		return audit_compare_gid(cred->egid, name, f, ctx);
 	case AUDIT_COMPARE_AUID_TO_OBJ_UID:
-		return audit_compare_uid(tsk->loginuid, name, f, ctx);
+		return audit_compare_uid(audit_get_loginuid(tsk), name, f, ctx);
 	case AUDIT_COMPARE_SUID_TO_OBJ_UID:
 		return audit_compare_uid(cred->suid, name, f, ctx);
 	case AUDIT_COMPARE_SGID_TO_OBJ_GID:
@@ -385,7 +385,8 @@  static int audit_field_compare(struct task_struct *tsk,
 		return audit_compare_gid(cred->fsgid, name, f, ctx);
 	/* uid comparisons */
 	case AUDIT_COMPARE_UID_TO_AUID:
-		return audit_uid_comparator(cred->uid, f->op, tsk->loginuid);
+		return audit_uid_comparator(cred->uid, f->op,
+					    audit_get_loginuid(tsk));
 	case AUDIT_COMPARE_UID_TO_EUID:
 		return audit_uid_comparator(cred->uid, f->op, cred->euid);
 	case AUDIT_COMPARE_UID_TO_SUID:
@@ -394,11 +395,14 @@  static int audit_field_compare(struct task_struct *tsk,
 		return audit_uid_comparator(cred->uid, f->op, cred->fsuid);
 	/* auid comparisons */
 	case AUDIT_COMPARE_AUID_TO_EUID:
-		return audit_uid_comparator(tsk->loginuid, f->op, cred->euid);
+		return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
+					    cred->euid);
 	case AUDIT_COMPARE_AUID_TO_SUID:
-		return audit_uid_comparator(tsk->loginuid, f->op, cred->suid);
+		return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
+					    cred->suid);
 	case AUDIT_COMPARE_AUID_TO_FSUID:
-		return audit_uid_comparator(tsk->loginuid, f->op, cred->fsuid);
+		return audit_uid_comparator(audit_get_loginuid(tsk), f->op,
+					    cred->fsuid);
 	/* euid comparisons */
 	case AUDIT_COMPARE_EUID_TO_SUID:
 		return audit_uid_comparator(cred->euid, f->op, cred->suid);
@@ -611,7 +615,8 @@  static int audit_filter_rules(struct task_struct *tsk,
 				result = match_tree_refs(ctx, rule->tree);
 			break;
 		case AUDIT_LOGINUID:
-			result = audit_uid_comparator(tsk->loginuid, f->op, f->uid);
+			result = audit_uid_comparator(audit_get_loginuid(tsk),
+						      f->op, f->uid);
 			break;
 		case AUDIT_LOGINUID_SET:
 			result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val);
@@ -2278,14 +2283,15 @@  int audit_signal_info(int sig, struct task_struct *t)
 {
 	struct audit_aux_data_pids *axp;
 	struct audit_context *ctx = audit_context();
-	kuid_t uid = current_uid(), t_uid = task_uid(t);
+	kuid_t uid = current_uid(), auid, t_uid = task_uid(t);
 
 	if (auditd_test_task(t) &&
 	    (sig == SIGTERM || sig == SIGHUP ||
 	     sig == SIGUSR1 || sig == SIGUSR2)) {
 		audit_sig_pid = task_tgid_nr(current);
-		if (uid_valid(current->loginuid))
-			audit_sig_uid = current->loginuid;
+		auid = audit_get_loginuid(current);
+		if (uid_valid(auid))
+			audit_sig_uid = auid;
 		else
 			audit_sig_uid = uid;
 		security_task_getsecid(current, &audit_sig_sid);