Re: [PATCH 0/3] arm64: defconfig: set/unset for allmodconfig

John Garry
2019-10-14T10:58:41Z

On 26/09/2019 20:30, Anders Roxell wrote:
> Hi,
>
> I'm trying to get an allmodconfig kernel to boot. The way I configure
> the kernel is:
> 'make allmodconfig KCONFIG_ALLCONFIG=$(pwd)/arch/arm64/configs/defconfig'
> allmodconfig will use the KCONFIG_ALLCONFIG file as the base and then
> turn the rest into modules.
>
> The idea behind using the defconfig as base and then configure the rest
> as modules is to get a bootbable kernel that have as many features
> turned on as possible. That will make it possible to run as wide a
> range of testsuites as possible on a single kernel.
>
> These patches makes it possible to boot a LE kernel.

JFYI, the CMDLINE_FORCE and CPU_BIG_ENDIAN changes only allow the
5.4-rc3 allmodconfig kernel to start to boot, but finally die, on my
arm64 ACPI-based system.

There is a lot of complaining from the kernel during its *10 minutes* of
booting, like this ...

39.993176][ T1] BUG: KASAN: use-after-free in
ghes_edac_unregister+0x28/0x70
[ 39.993187][ T1] Read of size 8 at addr ffff00235a099bdc by task
swapper/0/1
[ 39.993195][ T1]
[ 39.993209][ T1] CPU: 65 PID: 1 Comm: swapper/0 Tainted: G
W 5.4.0-rc3+ #1133
[ 39.993218][ T1] Hardware name: Huawei D06 /D06, BIOS Hisilicon
D06 UEFI RC0 - V1.16.01 03/15/2019
[ 39.993227][ T1] Call trace:
[ 39.993239][ T1] dump_backtrace+0x0/0x298
[ 39.993250][ T1] show_stack+0x20/0x30
[ 39.993262][ T1] dump_stack+0x190/0x21c
[ 39.993275][ T1] print_address_description.isra.6+0x80/0x3d0
[ 39.993286][ T1] __kasan_report+0x174/0x23c
[ 39.993298][ T1] kasan_report+0xc/0x18
[ 39.993310][ T1] __asan_load8+0xa4/0xb0
[ 39.993321][ T1] ghes_edac_unregister+0x28/0x70
[ 39.993333][ T1] ghes_remove+0x274/0x2a0
[ driver_probe_device+0x190/0x1f0
[ 39.993378][ T1] device_driver_attach+0x7c/0xb0
[ 39.993389][ T1] __driver_attach+0x1b8/0x1d0
[ 39.993401][ T1] bus_for_each_dev+0xf8/0x190
[ 39.993411][ T1] driver_attach+0x34/0x40
[ 39.993422][ T1] bus_add_driver+0x1d8/0x340

and then finally a watchdog timeout panic due to a hung task:

[ 624.246846][ T1143] kobject: '(null)' ((____ptrval____)): calling
ktype release
[ 624.263168][ T723] async_synchronize_cookie_domain+0x194/0x288
[ 624.269210][ T723] async_synchronize_cookie+0x28/0x38
[ 624.274473][ T723] async_port_probe+0x70/0xa8
[ 624.278833][ T850] kobject: '(null)' ((____ptrval____)):
kobject_cleanup, parent (____ptrval____)
[ 624.278844][ T1157] kobject: '(null)' ((____ptrval____)):
kobject_cleanup, parent (____ptrval____)
[ 624.278856][ T1157] kobject: '(null)' ((____ptrval____)): calling
ktype release
[ 624.279046][ T723] async_run_entry_fn+0x118/0x340
[ 624.287997][ T850] kobject: '(null)' ((____ptrval____)): calling
ktype release
[ 624.296975][ T723] process_one_work+0x7b8/0xdb8
[ 624.296989][ T723] worker_thread+0x414/0x6b8
[ 624.325726][ T723] kthread+0x1d4/0x1f0
[ 624.329684][ T723] ret_from_fork+0x10/0x18
[ 624.334007][ T723] INFO: task kworker/u195:4:1019 blocked for more
than 121 seconds.
[ 624.341871][ T723] Tainted: G B W 5.4.0-rc3+ #1133
[ 624.342853][ T415] kobject: '(null)' ((____ptrval____)):
kobject_cleanup, parent (____ptrval____)
[ 624.348427][ T723] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 624.348439][ T723] kworker/u195:4 D28496 1019 2 0x00000028
[ 624.357420][ T415] kobject: '(null)' ((____ptrval____)): calling
ktype release
[ 624.365968][ T723] Workqueue: events_unbound async_run_entry_fn
[ 624.385519][ T723] Call trace:
[ 624.388696][ T723] __switch_to+0x300/0x3e8
[ 624.393000][ T723] __schedule+0xc6c/0xd38
[ 624.397217][ T723] schedule+0x10c/0x168
[ 624.401262][ T723] async_synchronize_cookie_domain+0x194/0x288
[ 624.406842][ T950] kobject: '(null)' ((____ptrval____)):
kobject_cleanup, parent (____ptrval____)
[ 624.407300][ T723] async_synchronize_cookc_port_probe+0x5c/0xa8
[ 624.421511][ T723] async_run_entry_fn+0x118/0x340
[ 624.438286][ T723] process_one_work+0x7b8/0xdb8
[ 624.443027][ T723] worker_thread+0x414/0x6b8
[ 624.447504][ T723] kthread+0x1d4/0x1f0
[ 624.451462][ T723] ret_from_fork+0x10/0x18
[ 624.455932][ T723] INFO: lockdep is turned off.
[ 624.460587][ T723] Kernel panic - not syncing: hung_task: blocked tasks
[ 624.467292][ T723] CPU: 48 PID: 723 Comm: khungtaskd Tainted: G B
W 5.4.0-rc3+ #1133
[ 624.476248][ T723] Hardware name: Huawei D06 /D06, BIOS Hisilicon
D06 UEFI RC0 - V1.16.01 03/15/2019
[ 624.485461][ T723] Call trace:
[ 624.488603][ T723] dump_backtrace+0x0/0x298
[ 624.492958][ T723] show_stack+0x20/0x30
[ 624.496966][ T723] dump_stack+0x190/0x21c
[ 624.501148][ T723] panic+0x274/0x5a8
[ 624.504898][ T723] watchdog+0xa44/0xa88
[ 624.508906][ T723] kthread+0x1d4/0x1f0
[ 624.512827][ T723] ret_from_fork+0x10/0x18
[ 624.517387][ T723] SMP: stopping secondary CPUs
[ 624.522033][ T723] Kernel Offset: disabled
[ 624.526215][ T723] CPU features: 0x0002,23208a38
[ 624.530915][ T723] Memory Limit: none
[ 624.534815][ T723] ---[ end Kernel panic - not syncing: hung_task:
blocked tasks ]---

I think that I'm opening a can of worms here...

John

>
> Cheers,
> Anders
>
> Anders Roxell (3):
> arm64: configs: defconfig: enable DEBUG_PREEMPT and FTRACE
> arm64: configs: unset CMDLINE_FORCE
> arm64: configs: unset CPU_BIG_ENDIAN
>
> arch/arm64/configs/defconfig | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>