stable-rc 5.4: libhugetlbfs fallocate_stress.sh: Unable to handle kernel paging request at virtual address ffff00006772f000

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While running libhugetlbfs fallocate_stress.sh on stable-rc 5.4 branch kernel
on arm64 hikey device. The following kernel Internal error: Oops:
crash dump noticed.

fallocate_stress.sh (2M: 64):
[  129.706506] Unable to handle kernel paging request at virtual
address ffff00006772f000
[  129.714638] Mem abort info:
[  129.717553]   ESR = 0x96000047
[  129.720726]   EC = 0x25: DABT (current EL), IL = 32 bits
[  129.726188]   SET = 0, FnV = 0
[  129.729338]   EA = 0, S1PTW = 0
[  129.732573] Data abort info:
[  129.735546]   ISV = 0, ISS = 0x00000047
[  129.739493]   CM = 0, WnR = 1
[  129.742534] swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000013ad000
[  129.749409] [ffff00006772f000] pgd=0000000077ff7003,
pud=0000000077e0d003, pmd=0000000077cd1003, pte=006800006772f713
[  129.760294] Internal error: Oops: 96000047 [#1] PREEMPT SMP
[  129.765988] Modules linked in: wl18xx wlcore mac80211 cfg80211
hci_uart snd_soc_audio_graph_card adv7511 crct10dif_ce wlcore_sdio
btbcm snd_soc_simple_card_utils cec kirin_drm bluetooth drm_kms_helper
dw_drm_dsi rfkill drm fuse
[  129.786626] CPU: 1 PID: 1263 Comm: fallocate_stres Not tainted
5.4.41-rc1-00091-g132220af41e6 #1
[  129.795601] Hardware name: HiKey Development Board (DT)
[  129.800940] pstate: 80000005 (Nzcv daif -PAN -UAO)
[  129.805847] pc : clear_page+0x10/0x24
[  129.809594] lr : __cpu_clear_user_page+0xc/0x18
[  129.814225] sp : ffff800012a1bbe0
[  129.817609] x29: ffff800012a1bbe0 x28: fffffe00017d8000
[  129.823039] x27: ffff000073070268 x26: ffff800011adf000
[  129.828466] x25: ffff800011ae06c8 x24: 0000000000001000
[  129.833893] x23: 0000000000000000 x22: fffffe00017d8000
[  129.839320] x21: 0000000000000000 x20: 0000000006a00000
[  129.844747] x19: ffff000037945400 x18: 0000000000000000
[  129.850174] x17: 0000000000000000 x16: 0000000000000000
[  129.855602] x15: 0000000000000000 x14: 0000000000000000
[  129.861031] x13: 0000000000000000 x12: 0000000000000000
[  129.866458] x11: 0000000000000000 x10: ffff800012a1bbd0
[  129.871886] x9 : 0000000000000200 x8 : 0ffff00000010000
[  129.877314] x7 : 0000000000000000 x6 : 0000000000000080
[  129.882741] x5 : 0000000000000036 x4 : 0000020000200000
[  129.888170] x3 : 0000000000004bc0 x2 : 0000000000000004
[  129.893597] x1 : 0000000000000040 x0 : ffff00006772f000
[  129.899025] Call trace:
[  129.901530]  clear_page+0x10/0x24
[  129.904926]  clear_subpage+0x54/0x90
[  129.908580]  clear_huge_page+0x6c/0x208
[  129.912503]  hugetlbfs_fallocate+0x2e0/0x4a0
[  129.916869]  vfs_fallocate+0x1b8/0x2e0
[  129.920699]  ksys_fallocate+0x44/0x90
[  129.924446]  __arm64_sys_fallocate+0x1c/0x28
[  129.928811]  el0_svc_common.constprop.0+0x68/0x160
[  129.933708]  el0_svc_handler+0x20/0x80
[  129.937539]  el0_svc+0x8/0xc
[  129.940488] Code: d53b00e1 12000c21 d2800082 9ac12041 (d50b7420)
[  129.946719] ---[ end trace df98e92a449be749 ]---
[  129.959274] note: fallocate_stres[1263] exited with preempt_count 1

ref:
https://qa-reports.linaro.org/lkft/linux-stable-rc-5.4-oe/build/v5.4.40-91-g132220af41e6/testrun/1428986/log
https://qa-reports.linaro.org/lkft/linux-stable-rc-5.4-oe/build/v5.4.40-91-g132220af41e6/testrun/1428986/

kernel config:
https://builds.tuxbuild.com/SqvcoklXmvQsC70j6rfcgA/kernel.config

-- 
Linaro LKFT
https://lkft.linaro.org



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