Public bug reported:
I observed this stack trace when attempting to install the 2017.09.26
daily arm64/artful server ISO:
[ 107.816592] usercopy: kernel memory overwrite attempt detected to
(null) (<null>) (6 bytes)
[ 107.818389] Internal error: Oops - BUG: 0 [#1] SMP
[ 107.819170] Modules linked in: raid10 raid456 async_raid6_recov async_memcpy
async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
scsi_dh_alua scsi_dh_emc scsi_dh_hp_sw scsi_dh_rdac virtio_blk virtio_net
nls_utf8 isofs usb_storage virtio_scsi
[ 107.823033] CPU: 0 PID: 8105 Comm: dmraid Not tainted 4.13.0-12-generic
#13-Ubuntu
[ 107.824318] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 107.825490] task: ffff80007cfbe900 task.stack: ffff80007792c000
[ 107.826498] PC is at __check_object_size+0x114/0x200
[ 107.827349] LR is at __check_object_size+0x114/0x200
[ 107.828192] pc : [<ffff0000082b8534>] lr : [<ffff0000082b8534>] pstate:
00400145
[ 107.829458] sp : ffff80007792fb00
[ 107.830026] x29: ffff80007792fb00 x28: 0000000000000000
[ 107.830934] x27: 0000fffffa066520 x26: ffff80007ce6c000
[ 107.831840] x25: 000000000002001d x24: ffff80007ce60000
[ 107.832743] x23: 0000000000000006 x22: 0000000000000006
[ 107.833657] x21: 0000000000000000 x20: 0000000000000006
[ 107.834564] x19: 0000000000000000 x18: ffffffffffffffff
[ 107.835467] x17: 0000000000000000 x16: 0000000000000000
[ 107.836371] x15: ffff0000093b8c08 x14: 2820296c6c756e28
[ 107.837273] x13: 2020202020202020 x12: 2020206f74206465
[ 107.838175] x11: ffff0000093b9658 x10: ffff0000086a7e40
[ 107.839072] x9 : 746972777265766f x8 : 0000000000000017
[ 107.839972] x7 : 20293e6c6c756e3c x6 : ffff80007ffb5dc0
[ 107.840867] x5 : ffff80007ffb5dc0 x4 : 0000000000000000
[ 107.841771] x3 : ffff80007ffbe038 x2 : 0000000000040d00
[ 107.842668] x1 : 0000000000000000 x0 : 0000000000000059
[ 107.843566] Process dmraid (pid: 8105, stack limit = 0xffff80007792c000)
[ 107.844698] Stack: (0xffff80007792fb00 to 0xffff800077930000)
[ 107.845680] fb00: ffff80007792fb40 ffff0000084e22c0 ffff80007792fc40
ffff80007735ca08
[ 107.846998] fb20: ffff80007735c8c0 ffff0000093b8000 0000000000000006
ffff0000082cd088
[ 107.848319] fb40: ffff80007792fbf0 ffff0000084e2da4 ffff0000093b8000
0000000000002285
[ 107.849649] fb60: ffff80007ce60000 0000fffffa0664c8 ffff80007ce6c000
000000000002001d
[ 107.850974] fb80: ffff80007792fc40 ffff80007cfbe900 ffff000008a91000
ffff80007cfbe900
[ 107.852295] fba0: ffff80007792fc10 0000000000000000 ffff0000093b8000
0000000000000000
[ 107.853626] fbc0: ffff80007792fbf0 ffff0000082d022c ffff80007cfe9000
0000000000000000
[ 107.854944] fbe0: ffff80007cfe9000 0000000000040d00 ffff80007792fce0
ffff0000084e2f88
[ 107.856264] fc00: 0000000000002285 ffff80007a8d7a80 000000000002001d
0000fffffa0664c8
[ 107.857592] fc20: 0000fffffa0664c8 0000000000000009 0000000000000124
000000000000001d
[ 107.858917] fc40: fffffffd00000053 0000000400000006 000000000ed36f10
0000fffffa066520
[ 107.860240] fc60: 0000000000000000 0000000000001770 0000000000000000
0000000000000000
[ 107.861568] fc80: 0000000000000000 0000000000000000 0000000000000000
0000000000000200
[ 107.862890] fca0: 000000000ed2ee10 ffff80007792fe30 00000000000007ff
0000000000000fe4
[ 107.864214] fcc0: ffff80007792fce0 ffff0000084e2f6c 0000000000002285
0000000000040d00
[ 107.865539] fce0: ffff80007792fd10 ffff000000ae6798 ffff80007c873418
ffff80007a8d7a80
[ 107.866861] fd00: 000000000002001d 0000000000002285 ffff80007792fd50
ffff0000084d4294
[ 107.868184] fd20: 0000000000002285 ffff0000093b8000 0000fffffa0664c8
ffff80007a8d7a80
[ 107.869513] fd40: 000000000002001d ffffffffffffff9c ffff80007792fdc0
ffff0000083057f8
[ 107.870837] fd60: ffff80007ccac600 0000000000002285 0000fffffa0664c8
ffff80007ccac600
[ 107.872154] fd80: ffff80007cea0328 000000000000fc00 0000000000000000
0000000000000000
[ 107.873479] fda0: 0000000000001000 0000000000000000 0000000059cd5389
0000000000040d00
[ 107.874798] fdc0: ffff80007792fdf0 ffff0000082d4b4c ffff0000093b8000
0000000000002285
[ 107.876115] fde0: 0000fffffa0664c8 0000000000040d00 ffff80007792fe80
ffff0000082d530c
[ 107.877432] fe00: 0000000000000000 ffff80007ccac600 ffff80007ccac600
0000000000000009
[ 107.878757] fe20: 0000000000002285 0000fffffa0664c8 00006180000007ff
0000100000000001
[ 107.880075] fe40: ffff80007792fe80 ffff0000082d52d0 0000000000000000
ffff80007ccac600
[ 107.881398] fe60: ffff80007ccac600 0000000000000009 0000000000002285
0000000000040d00
[ 107.882723] fe80: 0000000000000000 ffff000008083930 0000000000000000
0000800076fe5000
[ 107.884044] fea0: ffffffffffffffff 0000ffffb982587c 0000000080000000
0000000000000015
[ 107.885365] fec0: 0000000000000009 0000000000002285 0000fffffa0664c8
0000000000000006
[ 107.886693] fee0: 0000000000000000 0000000000000004 0000ffffb98ba568
0000000000000050
[ 107.888012] ff00: 000000000000001d 0003ffffffffffff 0000000000000012
0000000000000011
[ 107.889338] ff20: 0000ffffb98ad000 00000000000000ff 0000ffffb99151f0
0000000000000531
[ 107.890666] ff40: 0000ffffb98ed348 0000ffffb9825870 0000000000000001
0000ffffb991b948
[ 107.891990] ff60: 0000000000000004 000000000ed36f10 0000000000000009
000000000ed2d260
[ 107.893311] ff80: 000000000ed36ee0 0000000000000003 0000ffffb98ba568
000000000ed36ee0
[ 107.894595] ffa0: 0000fffffa066628 0000fffffa0664a0 0000ffffb98ba5fc
0000fffffa0664a0
[ 107.895853] ffc0: 0000ffffb982587c 0000000080000000 0000000000000009
000000000000001d
[ 107.897109] ffe0: 0000000000000000 0000000000000000 00000000000000d8
0000000100000105
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: artful
** Attachment added: "console.log"
https://bugs.launchpad.net/bugs/1720229/+attachment/4958246/+files/console.log
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https://bugs.launchpad.net/bugs/1720229
Title:
arm64: usercopy: kernel memory overwrite attempt detected to
(null) (<null>) (6 bytes)
Status in linux package in Ubuntu:
Incomplete
Bug description:
I observed this stack trace when attempting to install the 2017.09.26
daily arm64/artful server ISO:
[ 107.816592] usercopy: kernel memory overwrite attempt detected to
(null) (<null>) (6 bytes)
[ 107.818389] Internal error: Oops - BUG: 0 [#1] SMP
[ 107.819170] Modules linked in: raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0
multipath linear scsi_dh_alua scsi_dh_emc scsi_dh_hp_sw scsi_dh_rdac virtio_blk
virtio_net nls_utf8 isofs usb_storage virtio_scsi
[ 107.823033] CPU: 0 PID: 8105 Comm: dmraid Not tainted 4.13.0-12-generic
#13-Ubuntu
[ 107.824318] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 107.825490] task: ffff80007cfbe900 task.stack: ffff80007792c000
[ 107.826498] PC is at __check_object_size+0x114/0x200
[ 107.827349] LR is at __check_object_size+0x114/0x200
[ 107.828192] pc : [<ffff0000082b8534>] lr : [<ffff0000082b8534>] pstate:
00400145
[ 107.829458] sp : ffff80007792fb00
[ 107.830026] x29: ffff80007792fb00 x28: 0000000000000000
[ 107.830934] x27: 0000fffffa066520 x26: ffff80007ce6c000
[ 107.831840] x25: 000000000002001d x24: ffff80007ce60000
[ 107.832743] x23: 0000000000000006 x22: 0000000000000006
[ 107.833657] x21: 0000000000000000 x20: 0000000000000006
[ 107.834564] x19: 0000000000000000 x18: ffffffffffffffff
[ 107.835467] x17: 0000000000000000 x16: 0000000000000000
[ 107.836371] x15: ffff0000093b8c08 x14: 2820296c6c756e28
[ 107.837273] x13: 2020202020202020 x12: 2020206f74206465
[ 107.838175] x11: ffff0000093b9658 x10: ffff0000086a7e40
[ 107.839072] x9 : 746972777265766f x8 : 0000000000000017
[ 107.839972] x7 : 20293e6c6c756e3c x6 : ffff80007ffb5dc0
[ 107.840867] x5 : ffff80007ffb5dc0 x4 : 0000000000000000
[ 107.841771] x3 : ffff80007ffbe038 x2 : 0000000000040d00
[ 107.842668] x1 : 0000000000000000 x0 : 0000000000000059
[ 107.843566] Process dmraid (pid: 8105, stack limit = 0xffff80007792c000)
[ 107.844698] Stack: (0xffff80007792fb00 to 0xffff800077930000)
[ 107.845680] fb00: ffff80007792fb40 ffff0000084e22c0 ffff80007792fc40
ffff80007735ca08
[ 107.846998] fb20: ffff80007735c8c0 ffff0000093b8000 0000000000000006
ffff0000082cd088
[ 107.848319] fb40: ffff80007792fbf0 ffff0000084e2da4 ffff0000093b8000
0000000000002285
[ 107.849649] fb60: ffff80007ce60000 0000fffffa0664c8 ffff80007ce6c000
000000000002001d
[ 107.850974] fb80: ffff80007792fc40 ffff80007cfbe900 ffff000008a91000
ffff80007cfbe900
[ 107.852295] fba0: ffff80007792fc10 0000000000000000 ffff0000093b8000
0000000000000000
[ 107.853626] fbc0: ffff80007792fbf0 ffff0000082d022c ffff80007cfe9000
0000000000000000
[ 107.854944] fbe0: ffff80007cfe9000 0000000000040d00 ffff80007792fce0
ffff0000084e2f88
[ 107.856264] fc00: 0000000000002285 ffff80007a8d7a80 000000000002001d
0000fffffa0664c8
[ 107.857592] fc20: 0000fffffa0664c8 0000000000000009 0000000000000124
000000000000001d
[ 107.858917] fc40: fffffffd00000053 0000000400000006 000000000ed36f10
0000fffffa066520
[ 107.860240] fc60: 0000000000000000 0000000000001770 0000000000000000
0000000000000000
[ 107.861568] fc80: 0000000000000000 0000000000000000 0000000000000000
0000000000000200
[ 107.862890] fca0: 000000000ed2ee10 ffff80007792fe30 00000000000007ff
0000000000000fe4
[ 107.864214] fcc0: ffff80007792fce0 ffff0000084e2f6c 0000000000002285
0000000000040d00
[ 107.865539] fce0: ffff80007792fd10 ffff000000ae6798 ffff80007c873418
ffff80007a8d7a80
[ 107.866861] fd00: 000000000002001d 0000000000002285 ffff80007792fd50
ffff0000084d4294
[ 107.868184] fd20: 0000000000002285 ffff0000093b8000 0000fffffa0664c8
ffff80007a8d7a80
[ 107.869513] fd40: 000000000002001d ffffffffffffff9c ffff80007792fdc0
ffff0000083057f8
[ 107.870837] fd60: ffff80007ccac600 0000000000002285 0000fffffa0664c8
ffff80007ccac600
[ 107.872154] fd80: ffff80007cea0328 000000000000fc00 0000000000000000
0000000000000000
[ 107.873479] fda0: 0000000000001000 0000000000000000 0000000059cd5389
0000000000040d00
[ 107.874798] fdc0: ffff80007792fdf0 ffff0000082d4b4c ffff0000093b8000
0000000000002285
[ 107.876115] fde0: 0000fffffa0664c8 0000000000040d00 ffff80007792fe80
ffff0000082d530c
[ 107.877432] fe00: 0000000000000000 ffff80007ccac600 ffff80007ccac600
0000000000000009
[ 107.878757] fe20: 0000000000002285 0000fffffa0664c8 00006180000007ff
0000100000000001
[ 107.880075] fe40: ffff80007792fe80 ffff0000082d52d0 0000000000000000
ffff80007ccac600
[ 107.881398] fe60: ffff80007ccac600 0000000000000009 0000000000002285
0000000000040d00
[ 107.882723] fe80: 0000000000000000 ffff000008083930 0000000000000000
0000800076fe5000
[ 107.884044] fea0: ffffffffffffffff 0000ffffb982587c 0000000080000000
0000000000000015
[ 107.885365] fec0: 0000000000000009 0000000000002285 0000fffffa0664c8
0000000000000006
[ 107.886693] fee0: 0000000000000000 0000000000000004 0000ffffb98ba568
0000000000000050
[ 107.888012] ff00: 000000000000001d 0003ffffffffffff 0000000000000012
0000000000000011
[ 107.889338] ff20: 0000ffffb98ad000 00000000000000ff 0000ffffb99151f0
0000000000000531
[ 107.890666] ff40: 0000ffffb98ed348 0000ffffb9825870 0000000000000001
0000ffffb991b948
[ 107.891990] ff60: 0000000000000004 000000000ed36f10 0000000000000009
000000000ed2d260
[ 107.893311] ff80: 000000000ed36ee0 0000000000000003 0000ffffb98ba568
000000000ed36ee0
[ 107.894595] ffa0: 0000fffffa066628 0000fffffa0664a0 0000ffffb98ba5fc
0000fffffa0664a0
[ 107.895853] ffc0: 0000ffffb982587c 0000000080000000 0000000000000009
000000000000001d
[ 107.897109] ffe0: 0000000000000000 0000000000000000 00000000000000d8
0000000100000105
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