mirror of
https://github.com/openharmony/kernel_linux_common_modules.git
synced 2026-08-27 19:49:56 -04:00
c30043414
106ffc4b63
Output: The anonymized executable memory address of the JIT region of the rendering process cannot be queried through cat proc/pid/maps A new memory security enhancement module has been added to the rendering, and this submission is a custom function that can perform memory address hiding for the rendering process Signed-off-by: caobaolong <caobaolong5@huawei.com> Change-Id: I302f45f92d41d0df3db0e54c018247890d244028
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2023 Huawei Device Co., Ltd.
|
|
*/
|
|
|
|
#include <internal.h>
|
|
#include <linux/security.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/mm_types.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/mm_inline.h>
|
|
#include <linux/hck/lite_hck_hideaddr.h>
|
|
#include <linux/hck/lite_vendor_hooks.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "avc.h"
|
|
#include "objsec.h"
|
|
|
|
static bool is_anon_exec(struct vm_area_struct *vma)
|
|
{
|
|
const char *name = NULL;
|
|
vm_flags_t flags = vma->vm_flags;
|
|
|
|
if (!(flags & VM_EXEC))
|
|
return false;
|
|
|
|
name = arch_vma_name(vma);
|
|
if (!name) {
|
|
struct anon_vma_name *anon_name;
|
|
anon_name = anon_vma_name(vma);
|
|
if (!anon_name)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int hideaddr_avc_has_perm(u16 tclass, u32 requested, struct seq_file *m)
|
|
{
|
|
struct av_decision avd;
|
|
struct inode *inode_task = file_inode(m->file);
|
|
struct task_struct *task = get_proc_task(inode_task);
|
|
u32 secid;
|
|
|
|
security_cred_getsecid(task->cred, &secid);
|
|
return avc_has_perm_noaudit(&selinux_state, secid, secid, tclass, requested,
|
|
AVC_STRICT, &avd);
|
|
}
|
|
|
|
static void hideaddr_header_prefix(unsigned long *start, unsigned long *end,
|
|
vm_flags_t *flags, struct seq_file *m, struct vm_area_struct *vma)
|
|
{
|
|
if (!is_anon_exec(vma))
|
|
return;
|
|
|
|
if (hideaddr_avc_has_perm(SECCLASS_HIDEADDR, HIDEADDR__HIDE_EXEC_ANON_MEM, m))
|
|
return;
|
|
|
|
if (!hideaddr_avc_has_perm(SECCLASS_HIDEADDR, HIDEADDR__HIDE_EXEC_ANON_MEM_DEBUG, m))
|
|
return;
|
|
|
|
*start = 0;
|
|
*end = 0;
|
|
*flags = 0;
|
|
}
|
|
|
|
static void hideaddr_header_prefix_lhck_register(void)
|
|
{
|
|
REGISTER_HCK_LITE_HOOK(hideaddr_header_prefix_lhck, hideaddr_header_prefix);
|
|
}
|
|
|
|
static int __init hideaddr_hooks_init(void)
|
|
{
|
|
hideaddr_header_prefix_lhck_register();
|
|
return 0;
|
|
}
|
|
|
|
static void __exit hideaddr_hooks_exit(void)
|
|
{
|
|
}
|
|
|
|
module_init(hideaddr_hooks_init);
|
|
module_exit(hideaddr_hooks_exit);
|