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Date:      Mon, 13 Jul 2020 14:05:38 +0000
From:      Glen Barber <gjb@freebsd.org>
To:        freebsd-current@freebsd.org
Subject:   Re: arm64 panic: reaper-related?
Message-ID:  <20200713140538.GA46078@FreeBSD.org>
In-Reply-To: <20200713135821.GS61041@FreeBSD.org>
References:  <20200713135821.GS61041@FreeBSD.org>

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On Mon, Jul 13, 2020 at 01:58:21PM +0000, Glen Barber wrote:
> Hi,
>=20
> This morning, one of our arm64 build machines panicked.  It looks like
> it is somehow reaper-related, but I am not entirely sure.  Backtrace
> follows.  Any thoughts?  I'm not quite sure where to go from here...
> Thanks in advance for any input.
>=20
> db> set $lines 0
> db> bt
> Tracing pid 11 tid 100003 td 0xfffffd0001634000
> db_trace_self() at db_stack_trace+0xf8
>          pc =3D 0xffff00000075fdac  lr =3D 0xffff000000103e78
>          sp =3D 0xffff00011eca89b0  fp =3D 0xffff00011eca89e0
>=20
> db_stack_trace() at db_command+0x228
>          pc =3D 0xffff000000103e78  lr =3D 0xffff000000103af0
>          sp =3D 0xffff00011eca89f0  fp =3D 0xffff00011eca8ad0
>=20
> db_command() at db_command_loop+0x58
>          pc =3D 0xffff000000103af0  lr =3D 0xffff000000103898
>          sp =3D 0xffff00011eca8ae0  fp =3D 0xffff00011eca8b00
>=20
> db_command_loop() at db_trap+0xf4
>          pc =3D 0xffff000000103898  lr =3D 0xffff000000106c0c
>          sp =3D 0xffff00011eca8b10  fp =3D 0xffff00011eca8d30
>=20
> db_trap() at kdb         pc =3D 0xffff000000106c0c  lr =3D 0xffff00000046=
3b0c
>          sp =3D 0xffff00011eca8d40  fp =3D 0xffff00011eca8df0
>=20
> kdb_trap() at do_el1h_sync+0xf4
>          pc =3D 0xffff000000463b0c  lr =3D 0xffff00000077b448
>          sp =3D 0xffff00011eca8e00  fp =3D 0xffff00011eca8e30
>=20
> do_el1h_sync() at handle_el1h_sync+0x78
>          pc =3D 0xffff00000077b448  lr =3D 0xffff000000762878
>          sp =3D 0xffff00011eca8e40  fp =3D 0xffff00011eca8f50
>=20
> handle_el1h_sync() at kdb_enter+0x34
>          pc =3D 0xffff000000762878  lr =3D 0xffff000000463168
>          sp =3D 0xffff00011eca8f60  fp =3D 0xffff00011eca8ff0
>=20
> kdb_enter() at vpanic+0x1b0
>          pc =3D 0xffff000000463168  lr =3D 0xffff000000417a74
>          sp =3D 0xffff00011eca9000  fp =3D 0xffff00011eca90b0
>=20
> vpanic() at panic+0x44
>          pc =3D 0xffff000000417a74  lr =3D 0xffff0000004178c0
>          sp =3D 0xffff00011eca90c0  fp =3D 0xffff00011eca9140
>=20
> panic() at __stack_chk_fail+0x10
>          pc =3D 0xffff0000004178c0  lr =3D 0xffff00000044ab6c
>          sp =3D 0xffff00011eca9150  fp =3D 0xffff00011eca9150
>=20
> __stack_chk_fail() at putchar+0x2bc
>          pc =3D 0xffff00000044ab6c  lr =3D 0xffff000000469ce8
>          sp =3D 0xffff00011eca9160  fp =3D 0xffff00011eca91e0
>=20
> putchar() at 0x106
>          pc =3D 0xffff000000469ce8  lr =3D 0x0000000000000106
>          sp =3D 0xffff00011eca91f0  fp =3D 0x0000000000000000
>=20
> db> show proc 11
> Process 11 (idle) at 0xfffffd0001630000:
>  state: NORMAL
>  uid: 0  gids: 0
>  parent: pid 0 at 0xffff0000010fae40
>  ABI: null
>  reaper: 0xffff0000010fae40 reapsubtree: 11
>  sigparent: 20
>  vmspace: 0xffff000001109200
>    (map 0xffff000001109200)
>    (map.pmap 0xffff0000011092c0)
>    (pmap 0xffff000001109320)
>  threads: 48
> 100003                   Run     CPU -1                      [idle: cpu0]
> 100004                   Run     CPU 1                       [idle: cpu1]
> 100005                   Run     CPU 2                       [idle: cpu2]
> 100006                   Run     CPU 3                       [idle: cpu3]
> 100007                   Run     CPU 4                       [idle: cpu4]
> 100008                   Run     CPU 5                       [idle: cpu5]
> 100009                   Run     CPU 6                       [idle: cpu6]
> 100010                   Run     CPU 7                       [idle: cpu7]
> 100011                   Run     CPU 8                       [idle: cpu8]
> 100012                   CanRun                              [idle: cpu9]
> 100013                   Run     CPU 10                      [idle: cpu10]
> 100014                   Run     CPU 11                      [idle: cpu11]
> 100015                   Run     CPU 12                      [idle: cpu12]
> 100016                   Run     CPU 13                      [idle: cpu13]
> 100017                   Run     CPU 14                      [idle: cpu14]
> 100018                   Run     CPU 15                      [idle: cpu15]
> 100019                   Run     CPU 16                      [idle: cpu16]
> 100020                   Run     CPU 17                      [idle: cpu17]
> 100021                   Run     CPU 18                      [idle: cpu18]
> 100022                   Run     CPU 19                      [idle: cpu19]
> 100023                   Run     CPU 20                      [idle: cpu20]
> 100024                   Run     CPU 21                      [idle: cpu21]
> 100025                   Run     CPU 22                      [idle: cpu22]
> 100026                   Run     CPU 23                      [idle: cpu23]
> 100027                   Run     CPU 24                      [idle: cpu24]
> 100028                   Run     CPU 25                      [idle: cpu25]
> 100029                   Run     CPU 26                      [idle: cpu26]
> 100030                   CanRun                              [idle: cpu27]
> 100031                   Run     CPU 28                      [idle: cpu28]
> 100032                   Run     CPU 29                      [idle: cpu29]
> 100033                   Run     CPU 30                      [idle: cpu30]
> 100034                   Run     CPU 31                      [idle: cpu31]
> 100035                   Run     CPU 32                      [idle: cpu32]
> 100036                   Run     CPU 33                      [idle: cpu33]
> 100037                   Run     CPU 34                      [idle: cpu34]
> 100038                   Run     CPU 35                      [idle: cpu35]
> 100039                   Run     CPU 36                      [idle: cpu36]
> 100040                   Run     CPU 37                      [idle: cpu37]
> 100041                   Run     CPU 38                      [idle: cpu38]
> 100042                   Run     CPU 39                      [idle: cpu39]
> 100043                   Run     CPU 40                      [idle: cpu40]
> 100044                   Run     CPU 41                      [idle: cpu41]
> 100045                   Run     CPU 42                      [idle: cpu42]
> 100046                   Run     CPU 43                      [idle: cpu43]
> 100047                   Run     CPU 44                      [idle: cpu44]
> 100048                   Run     CPU 45                      [idle: cpu45]
> 100049                   Run     CPU 46                      [idle: cpu46]
> 100050                   Run     CPU 47                      [idle: cpu47]
>=20
>=20

I should have included this as well...

db> show panic
panic: Misaligned access from kernel space!

Glen


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