[openEuler-20.03-LTS-SP3]打开kmemleak开关重编内核，重启后扫描到内存泄漏

**【标题描述】x86/arm打开kmemleak开关重编内核，重启后扫描到内存泄漏
**【环境信息】**
硬件信息：
虚机场景提供虚机XML文件
虚拟机规格：8cpu + 8G内存 + 100G存储
arm使用鲲鹏物理机装虚拟机, 虚拟机CPU模式为host-passthrough
x86使用intel物理机装虚拟机，虚拟机CPU模式为host-passthrough

软件信息：
1)系统版本:openEuler 20.03 LTS SP3
2)内核版本:4.19.90-2112.8.0.0131.oe1.aarch64

**【问题复现步骤】**
1.安装虚拟机
2.按照官方文档打开kmemleak开关重新编译内核，安装新内核重启（参照官方文档https://forum.openeuler.org/t/topic/615/1）
[root@wsip-70-182-148-86 ~]# cat /boot/config-4.19.91 | grep -i kmemleak
CONFIG_HAVE_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_KMEMLEAK=y
CONFIG_DEBUG_KMEMLEAK_EARLY_LOG_SIZE=40000
#CONFIG_DEBUG_KMEMLEAK_TEST is not set
#CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF is not set
3.查看/sys/kernel/debug/kmemleak文件扫描到selinux disabled前后内存泄漏

**【预期结果】**
没有内存泄漏

**【实际结果】**
查看/sys/kernel/debug/kmemleak文件扫描到selinux disabled前后内存泄漏

**【其他相关附件信息】**
查看/var/log/message日志
[root@wsip-70-182-148-86 ~]# cat /var/log/messages | grep kmemleak
Nov  9 20:37:36 localhost kernel: [    2.848656] kmemleak: Kernel memory leak detector initialized
Nov  9 20:37:36 localhost kernel: [    2.848663] kmemleak: Automatic memory scanning thread started
Nov  9 20:48:51 localhost kernel: [  677.872302] kmemleak: 164 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 20:58:57 localhost kernel: [ 1284.084692] kmemleak: 39 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 21:09:03 localhost kernel: [ 1890.282490] kmemleak: 12 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 21:39:22 localhost kernel: [ 3708.957539] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 22:09:41 localhost kernel: [ 5527.552732] kmemleak: 6 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 22:19:47 localhost kernel: [ 6133.739624] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 22:29:53 localhost kernel: [ 6739.944560] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov  9 23:00:12 localhost kernel: [ 8558.524334] kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 00:00:49 localhost kernel: [12195.705164] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 00:31:08 localhost kernel: [14014.290435] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 00:41:14 localhost kernel: [14620.492264] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 02:22:16 localhost kernel: [20682.452430] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 10:07:01 localhost kernel: [48567.471949] kmemleak: 3 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
Nov 10 10:24:23 localhost kernel: [    2.814167] kmemleak: Kernel memory leak detector initialized
Nov 10 10:24:23 localhost kernel: [    2.814169] kmemleak: Automatic memory scanning thread started
查看/sys/kernel/debug/kmemleak日志
[root@wsip-70-182-148-86 ~]#cat /sys/kernel/debug/kmemleak | wc -l
4706
[root@wsip-70-182-148-86 ~]#cat /sys/kernel/debug/kmemleak
unreferenced object 0xffff8000e1dce080 (size 128):
  comm "swapper/0", pid 1, jiffies 4294892835 (age 684.748s)
  hex dump (first 32 bytes):
    00 70 ec e2 00 80 ff ff 03 00 00 00 05 00 00 00  .p..............
    03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000f2295178>] kmem_cache_alloc_trace+0x138/0x230
    [<00000000fe5aa91d>] selinux_sb_alloc_security+0x30/0x98
    [<00000000345b4d79>] security_sb_alloc+0x30/0x50
    [<00000000ab4bc082>] sget_userns+0x16c/0x4c8
    [<00000000832e6498>] sget+0x88/0xb8
    [<00000000bd79c97f>] mount_single+0x48/0xd8
    [<000000005caf29b9>] sel_mount+0x3c/0x50
    [<00000000b6f4d911>] mount_fs+0x50/0x280
    [<000000003eff9f49>] vfs_kern_mount.part.10+0x54/0x188
    [<000000008cdafa20>] kern_mount_data+0x38/0x58
    [<000000005e17d84c>] init_sel_fs+0xa4/0x138
    [<00000000e7d478c1>] do_one_initcall+0x54/0x220
    [<0000000019ba2fa5>] kernel_init_freeable+0x2b0/0x3a0
    [<000000008d87871a>] kernel_init+0x18/0x118
    [<00000000aba7c0d0>] ret_from_fork+0x10/0x18
    [<00000000213be9f5>] 0xffffffffffffffff

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