linux-kernel - [PATCH v3 3/4] selinux: use vma_is_initial_stack() and vma_is_initial

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Message-ID: <20230728050043.59880-4-wangkefeng.wang@huawei.com>
Date:   Fri, 28 Jul 2023 13:00:42 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-mm@...ck.org>, <linux-perf-users@...r.kernel.org>,
        <selinux@...r.kernel.org>,
        Christian Göttsche <cgzones@...glemail.com>,
        David Hildenbrand <david@...hat.com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Alex Deucher <alexander.deucher@....com>,
        <christian.koenig@....com>, <Xinhui.Pan@....com>,
        <airlied@...il.com>, <daniel@...ll.ch>, <paul@...l-moore.com>,
        <stephen.smalley.work@...il.com>, <eparis@...isplace.org>,
        <peterz@...radead.org>, <acme@...nel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v3 3/4] selinux: use vma_is_initial_stack() and vma_is_initial_heap()

Use the helpers to simplify code.

Cc: Paul Moore <paul@...l-moore.com>
Cc: Stephen Smalley <stephen.smalley.work@...il.com>
Cc: Eric Paris <eparis@...isplace.org>
Acked-by: Paul Moore <paul@...l-moore.com>
Reviewed-by: David Hildenbrand <david@...hat.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 security/selinux/hooks.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c87b79a29fad..ac582c046c51 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3800,13 +3800,10 @@ static int selinux_file_mprotect(struct vm_area_struct *vma,
 	if (default_noexec &&
 	    (prot & PROT_EXEC) && !(vma->vm_flags & VM_EXEC)) {
 		int rc = 0;
-		if (vma->vm_start >= vma->vm_mm->start_brk &&
-		    vma->vm_end <= vma->vm_mm->brk) {
+		if (vma_is_initial_heap(vma)) {
 			rc = avc_has_perm(sid, sid, SECCLASS_PROCESS,
 					  PROCESS__EXECHEAP, NULL);
-		} else if (!vma->vm_file &&
-			   ((vma->vm_start <= vma->vm_mm->start_stack &&
-			     vma->vm_end >= vma->vm_mm->start_stack) ||
+		} else if (!vma->vm_file && (vma_is_initial_stack(vma) ||
 			    vma_is_stack_for_current(vma))) {
 			rc = avc_has_perm(sid, sid, SECCLASS_PROCESS,
 					  PROCESS__EXECSTACK, NULL);
-- 
2.41.0