arm64/mpam: fix mpam dts init arm_mpam_of_device_ids error

ascend inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I49RB2
CVE: NA

---------------------------------------------------

[    0.596145] BUG: KASAN: global-out-of-bounds in __of_match_node.part.0+0xe0/0x110
[    0.596731] Read of size 1 at addr ffff2000099a8288 by task swapper/0/1
[    0.597247]
[    0.597372] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.90+ #34
[    0.597858] Hardware name: linux,dummy-virt (DT)
[    0.598243] Call trace:
[    0.598443]  dump_backtrace+0x0/0x360
[    0.598734]  show_stack+0x24/0x30
[    0.599004]  dump_stack+0xdc/0x128
[    0.599323]  print_address_description+0x184/0x278
[    0.599771]  kasan_report+0x204/0x330
[    0.600117]  __asan_report_load1_noabort+0x30/0x40
[    0.600566]  __of_match_node.part.0+0xe0/0x110
[    0.600980]  of_match_node+0x6c/0xa8
[    0.601316]  of_match_device+0x48/0x70
[    0.601669]  platform_match+0xa4/0x260
[    0.602037]  __driver_attach+0x68/0x128
[    0.602397]  bus_for_each_dev+0x118/0x198
[    0.602773]  driver_attach+0x48/0x60
[    0.603112]  bus_add_driver+0x330/0x658
[    0.603472]  driver_register+0x148/0x398
[    0.603839]  __platform_driver_register+0xd4/0x108
[    0.604288]  arm_mpam_driver_init+0x64/0x78
[    0.604680]  do_one_initcall+0xbc/0x488
[    0.605039]  kernel_init_freeable+0x604/0x6f8
[    0.605447]  kernel_init+0x18/0x130
[    0.605775]  ret_from_fork+0x10/0x18
[    0.606130]
[    0.606274] The buggy address belongs to the variable:
[    0.606754]  arm_mpam_of_device_ids+0xc8/0x380
[    0.607168]
[    0.607314] Memory state around the buggy address:
[    0.607762]  ffff2000099a8180: 00 00 00 fa fa fa fa fa 00 00 00 00 00 00 00 00
[    0.608429]  ffff2000099a8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[    0.609095] >ffff2000099a8280: 00 fa fa fa fa fa fa fa 05 fa fa fa fa fa fa fa
[    0.609760]                       ^
[    0.610101]  ffff2000099a8300: 00 00 07 fa fa fa fa fa 00 04 fa fa fa fa fa fa
[    0.610771]  ffff2000099a8380: 00 00 00 06 fa fa fa fa 00 01 fa fa fa fa fa fa

The arm_mpam_of_device_ids array has no end item, so the array access
might be out of bounds. When enable the KASAN config, the out of bounds
call trace occured. The add empty end item for arm_mpam_of_device_ids
array to fix this issue.

Fixes: b45bdb5a ("arm64/mpam: add device tree support for mpam initialization")
Signed-off-by: NXingang Wang <wangxingang5@huawei.com>
Reviewed-by: NCheng Jian <cj.chengjian@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

arch/arm64/kernel/mpam/mpam_device.c

@@ -1715,6 +1715,7 @@ void mpam_component_get_config(struct mpam_component *comp,
 
 static const struct of_device_id arm_mpam_of_device_ids[] = {
 	{.compatible = "arm,mpam"},
+	{ }
 };
 
 static int of_mpam_parse_irq(struct platform_device *pdev,