1 files changed, 98 insertions, 0 deletions
diff --git a/security/apparmor/include/task.h b/security/apparmor/include/task.h
new file mode 100644
index 000000000..13437d62c
--- /dev/null
+++ b/security/apparmor/include/task.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * AppArmor security module
+ *
+ * This file contains AppArmor task related definitions and mediation
+ *
+ * Copyright 2017 Canonical Ltd.
+ */
+
+#ifndef __AA_TASK_H
+#define __AA_TASK_H
+
+static inline struct aa_task_ctx *task_ctx(struct task_struct *task)
+{
+	return task->security + apparmor_blob_sizes.lbs_task;
+}
+
+/*
+ * struct aa_task_ctx - information for current task label change
+ * @nnp: snapshot of label at time of no_new_privs
+ * @onexec: profile to transition to on next exec  (MAY BE NULL)
+ * @previous: profile the task may return to     (MAY BE NULL)
+ * @token: magic value the task must know for returning to @previous_profile
+ */
+struct aa_task_ctx {
+	struct aa_label *nnp;
+	struct aa_label *onexec;
+	struct aa_label *previous;
+	u64 token;
+};
+
+int aa_replace_current_label(struct aa_label *label);
+int aa_set_current_onexec(struct aa_label *label, bool stack);
+int aa_set_current_hat(struct aa_label *label, u64 token);
+int aa_restore_previous_label(u64 cookie);
+struct aa_label *aa_get_task_label(struct task_struct *task);
+
+/**
+ * aa_free_task_ctx - free a task_ctx
+ * @ctx: task_ctx to free (MAYBE NULL)
+ */
+static inline void aa_free_task_ctx(struct aa_task_ctx *ctx)
+{
+	if (ctx) {
+		aa_put_label(ctx->nnp);
+		aa_put_label(ctx->previous);
+		aa_put_label(ctx->onexec);
+	}
+}
+
+/**
+ * aa_dup_task_ctx - duplicate a task context, incrementing reference counts
+ * @new: a blank task context      (NOT NULL)
+ * @old: the task context to copy  (NOT NULL)
+ */
+static inline void aa_dup_task_ctx(struct aa_task_ctx *new,
+				   const struct aa_task_ctx *old)
+{
+	*new = *old;
+	aa_get_label(new->nnp);
+	aa_get_label(new->previous);
+	aa_get_label(new->onexec);
+}
+
+/**
+ * aa_clear_task_ctx_trans - clear transition tracking info from the ctx
+ * @ctx: task context to clear (NOT NULL)
+ */
+static inline void aa_clear_task_ctx_trans(struct aa_task_ctx *ctx)
+{
+	AA_BUG(!ctx);
+
+	aa_put_label(ctx->previous);
+	aa_put_label(ctx->onexec);
+	ctx->previous = NULL;
+	ctx->onexec = NULL;
+	ctx->token = 0;
+}
+
+#define AA_PTRACE_TRACE		MAY_WRITE
+#define AA_PTRACE_READ		MAY_READ
+#define AA_MAY_BE_TRACED	AA_MAY_APPEND
+#define AA_MAY_BE_READ		AA_MAY_CREATE
+#define PTRACE_PERM_SHIFT	2
+
+#define AA_PTRACE_PERM_MASK (AA_PTRACE_READ | AA_PTRACE_TRACE | \
+			     AA_MAY_BE_READ | AA_MAY_BE_TRACED)
+#define AA_SIGNAL_PERM_MASK (MAY_READ | MAY_WRITE)
+
+#define AA_SFS_SIG_MASK "hup int quit ill trap abrt bus fpe kill usr1 " \
+	"segv usr2 pipe alrm term stkflt chld cont stop stp ttin ttou urg " \
+	"xcpu xfsz vtalrm prof winch io pwr sys emt lost"
+
+int aa_may_ptrace(struct aa_label *tracer, struct aa_label *tracee,
+		  u32 request);
+
+
+#endif /* __AA_TASK_H */