On Thu, Apr 28, 2016 at 9:55 PM, Tim Gardner <email address hidden> wrote:
> Ming - please try the kernel at
> http://people.canonical.com/~rtg/lp1575506/ - I've updated AUFS to the
> latest stable branch. Source at git://kernel.ubuntu.com/rtg/ubuntu-
> xenial.git aufs

Looks no difference by installing the new kernel of 'Linux ubuntu
4.4.0-23-generic #39' on arm64.

Kernel oops can happen immediately by running the following command:

       stress-ng --remap 64 --timeout 60 -v


Thanks,
Ming

>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1575506
>
> Title:
>   Xenial: ARM64: Unable to handle kernel NULL pointer dereference at
>   virtual address 00000038
>
> Status in linux package in Ubuntu:
>   Confirmed
>
> Bug description:
>
>   When running 'stress-ng --all 64 -t 800 -v' on Xenial/ARM64, the following kernel oops is triggered.
>
>
>   [   93.309158] Unable to handle kernel NULL pointer dereference at virtual address 00000038
>   [   93.309160] pgd = ffff8007a5914000
>   [   93.309163] [00000038] *pgd=00000047a5b15003, *pud=00000047a5b16003, *pmd=0000000000000000
>   [   93.309167] Internal error: Oops: 96000006 [#1] SMP
>   [   93.309202] Modules linked in: wp512 rmd320 rmd256 rmd160 rmd128 md4 algif_hash af_alg xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 shpchp ghash_ce sha2_ce sha1_ce xgene_rng i2c_xgene_slimpro xgene_edac dwc3 edac_core udc_core i2c_designware_platform ulpi i2c_designware_core uio_pdrv_genirq uio gpio_keys rtc_efi autofs4 tg3 ptp pps_core sdhci_of_arasan ahci_xgene gpio_dwapb sdhci_pltfm xgene_enet libahci_platform sdhci libahci gpio_xgene_sb
>   [   93.309208] CPU: 5 PID: 2062 Comm: stress-ng-remap Not tainted 4.4.0-15.31-generic #31+clk.1
>   [   93.309209] Hardware name: AppliedMicro Mustang/Mustang, BIOS 2.04.08-beta Feb  2 2016
>   [   93.309211] task: ffff8007a58c5b00 ti: ffff8007a7a30000 task.ti: ffff8007a7a30000
>   [   93.309217] PC is at fput+0x20/0xd0
>   [   93.309222] LR is at vma_do_fput+0x24/0x48
>   [   93.309223] pc : [<ffff800000257578>] lr : [<ffff8000001fe1f4>] pstate: 60000145
>   [   93.309224] sp : ffff8007a7a33e20
>   [   93.309226] x29: ffff8007a7a33e20 x28: ffff8007a7a30000
>   [   93.309228] x27: 0000000000000003 x26: ffff8007a59886e8
>   [   93.309229] x25: ffff800746248ed8 x24: 0000000000008011
>   [   93.309231] x23: 0000000000000000 x22: ffff80000091b780
>   [   93.309232] x21: 0000000000001000 x20: 0000000000000000
>   [   93.309233] x19: 0000000000000000 x18: 0000000000001140
>   [   93.309235] x17: 0000ffff8915f2c0 x16: ffff800000133de0
>   [   93.309236] x15: 0000ffff893c2000 x14: 0000000000000000
>   [   93.309237] x13: 00000003e8000000 x12: 0000ffff734b0200
>   [   93.309239] x11: 00000000003d0f00 x10: 0000000000000930
>   [   93.309240] x9 : 0000000000000000 x8 : 0000000000000000
>   [   93.309242] x7 : ffff80074645ac10 x6 : 0068000000000f43
>   [   93.309243] x5 : 0068000000000f4f x4 : 0060000000000004
>   [   93.309245] x3 : 0068000000000f53 x2 : 0000000000000038
>   [   93.309246] x1 : ffff80000091b780 x0 : ffff8000001fe1f4
>
>   [   93.309248] Process stress-ng-remap (pid: 2062, stack limit = 0xffff8007a7a30020)
>   [   93.309250] Stack: (0xffff8007a7a33e20 to 0xffff8007a7a34000)
>   [   93.309252] 3e20: ffff8007a7a33e40 ffff8000001fe1f4 0000000000000000 ffff8007a59886e8
>   [   93.309253] 3e40: ffff8007a7a33e60 ffff80000020c1c0 0000ffff88300000 ffff800000d8e000
>   [   93.309255] 3e60: 0000ffffc85b2280 ffff800000085c70 0000000000000000 0000ffff88301000
>   [   93.309257] 3e80: ffffffffffffffff 0000ffff89161ea8 0000000080000000 0000000000000015
>   [   93.309258] 3ea0: 000000000000011d 00000000000000ea ffff800000901000 ffff8007a7a30000
>   [   93.309260] 3ec0: 0000000000001000 cb88537fdc8ba606 0000ffff88300000 0000000000001000
>   [   93.309261] 3ee0: 0000000000000000 0000000000000000 0000000000000000 0000000000000200
>   [   93.309262] 3f00: 00000000000000d1 00000000000000d1 00000000000000ea 0000000000002626
>   [   93.309264] 3f20: 0101010101010101 000000000000001e 0000000000000018 00000003e8000000
>   [   93.309266] 3f40: 0000000000000000 0000ffff893c2cc0 00000000004828c0 0000ffff89161ea0
>   [   93.309267] 3f60: 0000000000001140 0000000000000050 0000ffff88301000 0000000000001000
>   [   93.309269] 3f80: 0000000000001000 0000ffffc85b2368 0000ffff88d96fd0 0000000000004650
>   [   93.309270] 3fa0: 00000000004558f0 0000ffffc85b34b8 000000000048f000 0000ffffc85b2280
>   [   93.309271] 3fc0: 000000000042ec60 0000ffffc85b2280 0000ffff89161ea8 0000000080000000
>   [   93.309273] 3fe0: 0000ffff88300000 00000000000000ea ffff8007a7a33fe8 0000000000000000
>   [   93.309274] Call trace:
>   [   93.309277] [<ffff800000257578>] fput+0x20/0xd0
>   [   93.309280] [<ffff8000001fe1f4>] vma_do_fput+0x24/0x48
>   [   93.309283] [<ffff80000020c1c0>] SyS_remap_file_pages+0x258/0x2a0
>   [   93.309287] [<ffff800000085c70>] el0_svc_naked+0x24/0x28
>   [   93.309289] Code: aa1e03e0 d503201f 9100e262 f9800051 (c85f7c40)
>   [   93.309308] ---[ end trace e42a31bddbea7038 ]---
>   [   93.672808] Unable to handle kernel NULL pointer dereference at virtual address 00000038
>   [   93.672809] pgd = ffff8007d8f22000
>   [   93.672813] [00000038] *pgd=00000047d9123003, *pud=00000047d9124003, *pmd=0000000000000000
>   [   93.672817] Internal error: Oops: 96000006 [#2] SMP
>   [   93.672853] Modules linked in: wp512 rmd320 rmd256 rmd160 rmd128 md4 algif_hash af_alg xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 shpchp ghash_ce sha2_ce sha1_ce xgene_rng i2c_xgene_slimpro xgene_edac dwc3 edac_core udc_core i2c_designware_platform ulpi i2c_designware_core uio_pdrv_genirq uio gpio_keys rtc_efi autofs4 tg3 ptp pps_core sdhci_of_arasan ahci_xgene gpio_dwapb sdhci_pltfm xgene_enet libahci_platform sdhci libahci gpio_xgene_sb
>   [   93.672858] CPU: 0 PID: 1613 Comm: stress-ng-remap Tainted: G      D         4.4.0-15.31-generic #31+clk.1
>   [   93.672859] Hardware name: AppliedMicro Mustang/Mustang, BIOS 2.04.08-beta Feb  2 2016
>   [   93.672860] task: ffff8007d8ea4e00 ti: ffff8007d8f40000 task.ti: ffff8007d8f40000
>   [   93.672868] PC is at fput+0x20/0xd0
>   [   93.672872] LR is at vma_do_fput+0x24/0x48
>   [   93.672873] pc : [<ffff800000257578>] lr : [<ffff8000001fe1f4>] pstate: 60000145
>   [   93.672874] sp : ffff8007d8f43e20
>   [   93.672876] x29: ffff8007d8f43e20 x28: ffff8007d8f40000
>   [   93.672878] x27: 0000000000000003 x26: ffff8007d8ed0d68
>   [   93.672879] x25: ffff80077ebe2d48 x24: 0000000000008011
>   [   93.672881] x23: 000000000000018d x22: ffff80000091b780
>   [   93.672882] x21: 0000000000001000 x20: 0000000000000000
>   [   93.672884] x19: 0000000000000000 x18: 0000000000001140
>   [   93.672885] x17: 0000ffff892089a0 x16: ffff800000255e18
>   [   93.672887] x15: 0000ffff893c2cc0 x14: 0000000000000000
>   [   93.672888] x13: 00000003e8000000 x12: 0000ffffc85b3330
>   [   93.672890] x11: 0000000000000f11 x10: 0000000000000930
>   [   93.672891] x9 : ffff8007d8f43c50 x8 : 000000000000018d
>   [   93.672893] x7 : ffff80077a29af30 x6 : 0068000000000f43
>   [   93.672894] x5 : 0068000000000f4f x4 : 0060000000000004
>   [   93.672896] x3 : 0068000000000f53 x2 : 0000000000000038
>   [   93.672897] x1 : ffff80000091b780 x0 : ffff8000001fe1f4
>
>   [   93.672899] Process stress-ng-remap (pid: 1613, stack limit = 0xffff8007d8f40020)
>   [   93.672901] Stack: (0xffff8007d8f43e20 to 0xffff8007d8f44000)
>   [   93.672903] 3e20: ffff8007d8f43e40 ffff8000001fe1f4 0000000000000000 ffff8007d8ed0d68
>   [   93.672905] 3e40: ffff8007d8f43e60 ffff80000020c1c0 0000ffff88426000 ffff800000d8e000
>   [   93.672907] 3e60: 0000ffffc85b2280 ffff800000085c70 0000000000000000 0000ffff88427000
>   [   93.672908] 3e80: ffffffffffffffff 0000ffff89161ea8 0000000080000000 0000000000000015
>   [   93.672910] 3ea0: 000000000000011d 00000000000000ea ffff800000901000 ffff8007d8f40000
>   [   93.672911] 3ec0: 0000000000001000 cb88537fdc8ba606 0000ffff88426000 0000000000001000
>   [   93.672913] 3ee0: 0000000000000000 000000000000018d 0000000000000000 0000000000000200
>   [   93.672914] 3f00: 000000003d71bd5b 0000000024f659ca 00000000000000ea 00000000000022b2
>   [   93.672916] 3f20: 0101010101010101 000000000000001e 0000000000000018 00000003e8000000
>   [   93.672917] 3f40: 0000000000000000 0000ffff893c2cc0 00000000004828c0 0000ffff89161ea0
>   [   93.672919] 3f60: 0000000000001140 0000000000000176 0000ffff88427000 0000000000001000
>   [   93.672921] 3f80: 0000000000001000 0000ffffc85b2368 0000ffff88d96860 0000000000004650
>   [   93.672922] 3fa0: 00000000004558f0 0000ffffc85b34b8 000000000048f000 0000ffffc85b2280
>   [   93.672924] 3fc0: 000000000042ec60 0000ffffc85b2280 0000ffff89161ea8 0000000080000000
>   [   93.672925] 3fe0: 0000ffff88426000 00000000000000ea 0000000000000000 000000000000b700
>   [   93.672926] Call trace:
>   [   93.672929] [<ffff800000257578>] fput+0x20/0xd0
>   [   93.672932] [<ffff8000001fe1f4>] vma_do_fput+0x24/0x48
>   [   93.672935] [<ffff80000020c1c0>] SyS_remap_file_pages+0x258/0x2a0
>   [   93.672939] [<ffff800000085c70>] el0_svc_naked+0x24/0x28
>   [   93.672942] Code: aa1e03e0 d503201f 9100e262 f9800051 (c85f7c40)
>   [   93.672960] ---[ end trace e42a31bddbea7039 ]---
>
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