ext4文件系统上触发open时发现softlockup

1.使用附件的tmp.c编译
2.tmp.img挂载到tmp_dir，执行./tmp tmp_dir，出现softlockup

RELEASE: 4.19.95-2002.1.0.0027.aarch64
PANIC: "Kernel panic - not syncing: softlockup: hung tasks"

crash> bt
PID: 3811   TASK: ffff8000f6dc5d00  CPU: 0   COMMAND: "arm_syscall-tmp"
bt: invalid kernel virtual address: 0  type: "IRQ stack contents"
bt: read of IRQ stack at 0 failed
 #0 [ffff00000800fb30] __crash_kexec at ffff0000081b0cd0
 #1 [ffff00000800fcc0] panic at ffff0000080e9b58
 #2 [ffff00000800fda0] watchdog_timer_fn at ffff0000081e808c
 #3 [ffff00000800fe20] __hrtimer_run_queues at ffff00000818ac10
 #4 [ffff00000800fea0] hrtimer_interrupt at ffff00000818bb7c
 #5 [ffff00000800ff10] arch_timer_handler_virt at ffff00000880d334
 #6 [ffff00000800ff30] handle_percpu_devid_irq at ffff00000816ab9c
 #7 [ffff00000800ff70] generic_handle_irq at ffff000008162ee0
 #8 [ffff00000800ff90] __handle_domain_irq at ffff0000081637fc
 #9 [ffff00000800ffd0] gic_handle_irq at ffff0000080816c0
--- <IRQ stack> ---
#10 [ffff00000d52f810] el1_irq at ffff0000080834b4
     PC: ffff0000089de3dc  [__ll_sc_atomic_sub_return_release+20]
     LR: ffff00000235eb38  [ext4_es_lookup_extent+192]
     SP: ffff00000d52f820  PSTATE: a0000005
    X29: ffff00000d52f820  X28: 0000000000000000  X27: 0000000000000007
    X26: 0000000014f01be0  X25: 0000000000000000  X24: 0000000000000000
    X23: 0000000000000001  X22: ffff8000412bf6a8  X21: ffff00000d52f8c0
    X20: ffff8000412bf3e8  X19: 0000000014f01be4  X18: 0000000000000000
    X17: 0000000000000000  X16: 0000000000000000  X15: 0000000000000000
    X14: 0000000000000000  X13: 0000000000000000  X12: 0000000000000010
    X11: 0000000000000010  X10: ffff800060272000   X9: 0000000000000000
     X8: ffff8000ff9783e8   X7: 0000000000000000   X6: ffff00000d52fae0
     X5: 0000000000000000   X4: ffff00000d52fa58   X3: 00000000fffffffe
     X2: ffff8000412bf6a8   X1: ffff8000412bf6a8   X0: 0000000000000200
#11 [ffff00000d52f820] __ll_sc_atomic_sub_return_release at ffff0000089de3d8
#12 [ffff00000d52f860] ext4_map_blocks at ffff00000236f410 [ext4]
#13 [ffff00000d52f8f0] ext4_getblk at ffff000002370910 [ext4]
#14 [ffff00000d52f950] ext4_bread_batch at ffff000002370c18 [ext4]
#15 [ffff00000d52f9b0] ext4_find_entry at ffff00000238acd8 [ext4]
#16 [ffff00000d52faa0] ext4_lookup at ffff00000238b058 [ext4]
#17 [ffff00000d52faf0] lookup_open at ffff000008345f34
#18 [ffff00000d52fb80] do_last at ffff000008346748
#19 [ffff00000d52fc30] path_openat at ffff000008346c94
#20 [ffff00000d52fcb0] do_filp_open at ffff00000834836c
#21 [ffff00000d52fdd0] do_sys_open at ffff000008330a4c
#22 [ffff00000d52fe40] __arm64_sys_openat at ffff000008330b40
#23 [ffff00000d52fe60] el0_svc_common at ffff0000080982a4
#24 [ffff00000d52fea0] el0_svc_handler at ffff000008098394
#25 [ffff00000d52fff0] el0_svc at ffff000008084184

GVP openEuler/kernel

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GVPopenEuler/kernel

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