【openEuler-1.0-LTS】sched: Fix null pointer derefrence for sd->span

【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）
【环境信息】
硬件信息：
x86 arm64
【问题复现步骤】
运行ltp下面用例：
cpuhotplug04.sh -l 1   
出现概率(是否必现，概率性错误)
【预期结果】
ltp压测正常
【实际结果】
[  599.811593] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[  599.820728] Mem abort info:
[  599.823606]   ESR = 0x96000045
[  599.826760]   Exception class = DABT (current EL), IL = 32 bits
[  599.832894]   SET = 0, FnV = 0
[  599.836048]   EA = 0, S1PTW = 0
[  599.839285] Data abort info:
[  599.842252]   ISV = 0, ISS = 0x00000045
[  599.846218]   CM = 0, WnR = 1
[  599.849280] user pgtable: 64k pages, 48-bit VAs, pgdp = 0000000053850315
[  599.856230] [0000000000000000] pgd=0000000000000000, pud=0000000000000000
[  599.863276] Internal error: Oops: 96000045 [#1] SMP
[  599.868323] Modules linked in: devlink xt_CHECKSUM ipt_MASQUERADE xt_conntrack ipt_REJECT tun cfg80211 nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nf_tables_set nf_tables ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat_ipv4 nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c iptable_mangle iptable_raw iptable_security rfkill ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables rpcrdma sunrpc rdma_ucm ib_uverbs ib_srpt ib_isert iscsi_target_mod target_core_mod ib_iser rdma_cm iw_cm ib_cm libiscsi scsi_transport_iscsi hns_roce_hw_v2 hns_roce ib_core ses ipmi_ssif enclosure sg ipmi_si ipmi_devintf ipmi_msghandler
[  599.942621]  hisi_uncore_l3c_pmu hisi_uncore_ddrc_pmu hisi_uncore_hha_pmu spi_dw_mmio hisi_uncore_pmu vfat fat sch_fq_codel fuse ext4 mbcache jbd2 sd_mod hisi_sas_v3_hw aes_ce_blk crypto_simd cryptd hisi_sas_main realtek ixgbe aes_ce_cipher hinic libsas ghash_ce hclge sha2_ce sha256_arm64 ahci sha1_ce libahci scsi_transport_sas sbsa_gwdt libata nfit hns3 megaraid_sas libnvdimm host_edma_drv hnae3 mdio i2c_designware_platform i2c_designware_core dm_mirror dm_region_hash dm_log dm_mod
[  600.037583] Process (sa1) (pid: 12850, stack limit = 0x00000000c4e4b83f)
[  600.052013] CPU: 75 PID: 12850 Comm: (sa1) Kdump: loaded Not tainted 4.19.90openeuler+ #4
[  600.075915] Hardware name: Huawei TaiShan 2280 V2/BC82AMDDA, BIOS 1.70 01/07/2021
[  600.099713] pstate: 00400009 (nzcv daif +PAN -UAO)
[  600.112821] pc : init_affinity_domains+0xf4/0x200
[  600.125918] lr : init_affinity_domains+0xd4/0x200
[  600.138913] sp : ffff00004064fca0
[  600.150394] x29: ffff00004064fca0 x28: 0000000000000003 
[  600.163844] x27: 00000000006000c0 x26: ffff0000093d37c8 
[  600.177149] x25: ffff802094294200 x24: ffff805fffdfd480 
[  600.190485] x23: ffffa0400f67fa60 x22: 0000000000000002 
[  600.203458] x21: ffffa0400f67fab0 x20: ffff000008ec17e8 
[  600.216235] x19: 0000000000000003 x18: 0000000000000000 
[  600.228961] x17: 0000000000000000 x16: 0000000000000000 
[  600.241306] x15: 0000000000000000 x14: 0000000000000000 
[  600.253382] x13: 0000000000000000 x12: 0000000000000000 
[  600.265290] x11: 0000000000000000 x10: 0000000000000000 
[  600.276822] x9 : 0000000000000000 x8 : ffffa0400f67fc00 
[  600.288126] x7 : 0000000000000000 x6 : ffff0000093d5000 
[  600.299312] x5 : 00000000ffffffff x4 : ffffffe000000001 
[  600.310186] x3 : ffffa0400f67fa88 x2 : ffff8040045f9538 
[  600.320870] x1 : 0000000000000000 x0 : ffff8040045f9400 
[  600.331355] Call trace:
[  600.338734]  init_affinity_domains+0xf4/0x200
[  600.347955]  init_auto_affinity+0x78/0xc0
[  600.356622]  alloc_fair_sched_group+0xd8/0x210
[  600.365594]  sched_create_group+0x48/0xc0
[  600.373970]  sched_autogroup_create_attach+0x54/0x190
[  600.383311]  ksys_setsid+0x110/0x130
[  600.391014]  __arm64_sys_setsid+0x18/0x24
[  600.399156]  el0_svc_common+0x118/0x170
[  600.406818]  el0_svc_handler+0x3c/0x80
[  600.414188]  el0_svc+0x8/0x640
[  600.420719] Code: b40002c0 9104e002 f9402061 a9401444 (a9001424) 
[  600.430504] SMP: stopping secondary CPUs
[  600.441751] Starting crashdump kernel...
[  600.449392] Bye!

【附件信息】
比如系统message日志/组件日志、dump信息、图片等

GVP openEuler/kernel

内容风险标识

评论 (1)

GVPopenEuler/kernel

内容风险标识