cgroup oom后触发非法指针访问

【标题描述】cgroup oom后出发非法指针访问
【环境信息】
硬件信息：
1）	裸机场景提供出问题的硬件信息；
2）	虚机场景提供虚机XML文件或者配置信息
软件信息：
1）	OS版本及分支
2）	内核信息
3）	发现问题的组件版本信息
如果有特殊组网，请提供网络拓扑图
【问题复现步骤】
1、找了一个现成的cgroup组 把bash加进去
2、每隔10秒vi打开一个大文件 触发cgroup组oom_kill杀继承
存储环境持续10分钟左右 出现oops复位

出现概率(是否必现，概率性错误): 概率性错误
【预期结果】
不出现oops问题
【实际结果】
出现了oops 
【附件信息】
<1>[24700.682554]Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
<1>[24700.682558]Mem abort info:
<1>[24700.682559]  ESR = 0x96000004
<1>[24700.682561]  Exception class = DABT (current EL), IL = 32 bits
<1>[24700.682562]  SET = 0, FnV = 0
<1>[24700.682563]  EA = 0, S1PTW = 0
<1>[24700.682564]Data abort info:
<1>[24700.682565]  ISV = 0, ISS = 0x00000004
<1>[24700.682566]  CM = 0, WnR = 0
<1>[24700.682570]user pgtable: 4k pages, 48-bit VAs, pgdp = 00000000e29d3465
<1>[24700.682571][0000000000000000] pgd=0000000000000000
<0>[24700.682575]Internal error: Oops: 96000004 [#1] SMP
<0>[24700.682578]Process cp (pid: 3495805, stack limit = 0x0000000000000000)
<4>[24700.682582]CPU: 82 PID: 3495805 Comm: cp Tainted: P        WC O  K   4.19.90-vhulk2204.1.0.h1160.eulerosv2r10.aarch64 #1
<4>[24700.682584]Hardware name:  PANGEA/STL6SPCA, BIOS BIOS TA Pangea4U4P - 32.11.60T13 07/20/2022
<4>[24700.682586]pstate: 60400009 (nZCv daif +PAN -UAO)
<4>[24700.682594]pc : __entry_tramp_text_end+0x2688/0x6000
<4>[24700.682603]lr : copyout_generic_read+0x48/0x58
<4>[24700.682604]sp : ffff0000f67dbb80
<4>[24700.682604]x29: ffff0000f67dbb80 x28: ffff7e8987dda280 
<4>[24700.682606]x27: 0000000000001000 x26: 0000aaaad5d13000 
<4>[24700.682607]x25: 0000000000001000 x24: 0000000000000000 
<4>[24700.682609]x23: 0000000000000000 x22: ffff0000f67dbd80 
<4>[24700.682610]x21: ffff0000f67dbd48 x20: 0000000000001000 
<4>[24700.682611]x19: ffffa261f768a000 x18: 0000000000000000 
<4>[24700.682612]x17: 0000000000000000 x16: 0000000000000000 
<4>[24700.682614]x15: 0000000000000000 x14: 0000e5536e1d4098 
<4>[24700.682615]x13: dcad000000001577 x12: bcb20000000008db 
<4>[24700.682616]x11: be400000000000ae x10: 00002917308a3ebf 
<4>[24700.682617]x9 : 33c1000000001577 x8 : 84f60000000008db 
<4>[24700.682618]x7 : d2c00000000000ae x6 : 0000aaaad5d13000 
<4>[24700.682620]x5 : 0000aaaad5d14000 x4 : 0000000000000000 
<4>[24700.682621]x3 : 0000aaaad5d13000 x2 : 0000000000000f80 
<4>[24700.682622]x1 : ffffa261f768a040 x0 : 0000aaaad5d13000 
<4>[24700.682625]Call trace:
<4>[24700.682627] __entry_tramp_text_end+0x2688/0x6000
<4>[24700.682629] copy_page_to_iter_generic_read+0xcc/0x258
<4>[24700.682641] generic_file_buffered_read+0x258/0xb00
<4>[24700.682645] generic_file_read_iter+0x114/0x190
<4>[24700.682757] nfs_file_read+0x8c/0x100 [nfs]
<4>[24700.682765] __vfs_read+0x130/0x1a0
<4>[24700.682767] vfs_read+0x94/0x150
<4>[24700.682768] ksys_read+0x74/0xf0
<4>[24700.682769] __arm64_sys_read+0x24/0x30
<4>[24700.682782] el0_svc_common+0x80/0x200
<4>[24700.682783] el0_svc_handler+0x78/0xe0
<4>[24700.682787] el0_svc+0x10/0x5c0
<0>[24700.682790]Code: d65f03c0 d500419f eb0000df 54000081 (394001e3) 
<5>[24700.682791]kernel fault(0x1) notification starting on CPU 82

GVP openEuler/kernel
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GVPopenEuler/kernelClosed

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