【OLK-6.6】BUG: kernel NULL pointer dereference, address: 0000000000000818

**【标题描述】能够简要描述问题：说明什么场景下，做了什么操作，出现什么问题（尽量使用正向表达方式）**

**一、缺陷信息**

**内核信息：**
6.6.0
**缺陷归属组件：**

**缺陷归属的版本：**

**缺陷简述：**

**【环境信息】**
硬件信息
x86服务器
软件信息

- 发现问题的组件版本信息
网络信息
- 如果有特殊组网，请提供网络拓扑信息

**【问题复现步骤】
    sysctl -w kernel.panic_on_warn=1
    INS=/sys/kernel/tracing/instances/A
    while [ true ]; do
        mkdir $INS
        rmdir $INS
    done &
    pid_1=$!
    while [ true ]; do
        head -10 $INS/events/sched/sched_switch/hist 2&>1 > /dev/null
    done &
    pid_2=$!
    sleep 10
    kill -9 ${pid_1}
    kill -9 ${pid_2}

**【实际结果】**
系统panic，日志如下：
[  160.144233] BUG: kernel NULL pointer dereference, address: 0000000000000818
[  160.152105] #PF: supervisor read access in kernel mode
[  160.158099] #PF: error_code(0x0000) - not-present page
[  160.164093] PGD 0 P4D 0
[  160.167412] Oops: 0000 [#1] PREEMPT SMP PTI
[  160.172425] CPU: 16 PID: 3585 Comm: head Kdump: loaded Not tainted 6.6.0+ #1
[  160.180382] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 8.40 09/30/2023
[  160.188247] RIP: 0010:hist_show+0x6a/0x220
[  160.193176] Code: 38 49 83 c4 38 31 d2 48 8d 58 c0 49 39 c4 75 16 e9 94 01 00 00 48 8b 43 40 48 8d 58 c0 49 39 c4 0f 84 83 01 00 00 48 8b 43 18 <83> 78 18 10 75 e5 44 8d 72 01 85 d2 7e 0f 48 c7 c6 93 40 4b a8 48
[  160.213161] RSP: 0018:ffffc9001dfffd80 EFLAGS: 00010283
[  160.219242] RAX: 0000000000000800 RBX: ffff888148533b20 RCX: ffffffffa9052890
[  160.227287] RDX: 0000000000000000 RSI: ffffc9001dfffd10 RDI: ffffffffa9052888
[  160.235328] RBP: ffff88e0544a22d0 R08: 0000000000000038 R09: 0000000000000000
[  160.243370] R10: 0000000000000000 R11: ffff89403f6b3124 R12: ffff8881485338f8
[  160.251411] R13: ffffc9001dfffe60 R14: 0000000000000001 R15: 0000000000000001
[  160.259454] FS:  00007f1d2f696740(0000) GS:ffff89403f680000(0000) knlGS:0000000000000000
[  160.268479] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  160.275095] CR2: 0000000000000818 CR3: 00000060b8286001 CR4: 00000000007706e0
[  160.283138] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  160.291180] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  160.299223] PKRU: 55555554
[  160.302721] Call Trace:
[  160.305949]  <TASK>
[  160.308822]  ? __die+0x23/0x70
[  160.312682]  ? page_fault_oops+0x81/0x150
[  160.317519]  ? finish_task_switch.isra.0+0x8d/0x2c0
[  160.323251]  ? exc_page_fault+0x54f/0x7b0
[  160.328089]  ? asm_exc_page_fault+0x26/0x30
[  160.333106]  ? hist_show+0x6a/0x220
[  160.337405]  ? __kmalloc_node+0x55/0x130
[  160.342153]  seq_read_iter+0x123/0x470
[  160.346723]  ? __handle_mm_fault+0x5ed/0x7c0
[  160.351831]  seq_read+0xad/0xe0
[  160.355774]  vfs_read+0xa2/0x1d0
[  160.359810]  ksys_read+0x67/0xe0
[  160.363845]  do_syscall_64+0x3b/0x90
[  160.368237]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[  160.374140] RIP: 0033:0x7f1d2f78f4b1
[  160.378532] Code: 00 48 8b 15 69 49 0d 00 f7 d8 64 89 02 b8 ff ff ff ff eb c3 e8 c0 c3 01 00 f3 0f 1e fa 80 3d b5 ce 0d 00 00 74 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 57 c3 66 0f 1f 44 00 00 48 83 ec 28 48 89 54

**【其他相关附件信息】**
比如系统message日志/组件日志、dump信息、图片等

**缺陷详情参考链接：**

**缺陷分析指导链接：**
https：xxx

GVP openEuler/kernel
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