Re: [sched/fair] 64228563c2: WARNING:at_kernel/kthread.c:#__kthread_bind_mask

Yafang Shao
2021-11-08T03:54:07Z

On Sun, Nov 7, 2021 at 5:38 PM kernel test robot <oliver.sang@intel.com> wrote:
>
>
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 64228563c20f024e40e4bdaa51eeec99002c489f ("[RFC PATCH 2/4] sched/fair: Introduce cfs_migration")
> url: https://github.com/0day-ci/linux/commits/Yafang-Shao/sched-Introduce-cfs_migration/20211104-225939
> base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git 8ea9183db4ad8afbcb7089a77c23eaf965b0cacd
> patch link: https://lore.kernel.org/lkml/20211104145713.4419-3-laoar.shao@gmail.com
>
> in testcase: leaking-addresses
> version: leaking-addresses-x86_64-cf2a85e-1_20211103
> with following parameters:
>
> ucode: 0x28
>
>
>
> on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with 16G memory
>
> caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
>
>
> +--------------------------------------------------+------------+------------+
> | | 812ea7cfb1 | 64228563c2 |
> +--------------------------------------------------+------------+------------+
> | boot_successes | 10 | 0 |
> | boot_failures | 0 | 11 |
> | WARNING:at_kernel/kthread.c:#__kthread_bind_mask | 0 | 11 |
> | RIP:__kthread_bind_mask | 0 | 11 |
> +--------------------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <oliver.sang@intel.com>
>

Thanks for the report!

Should make below change:

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4a906412570e..fa720e840c6d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -12037,7 +12037,6 @@ static struct smp_hotplug_thread
cfs_migration_threads = {

static int __init cfs_migration_init(void)
{
- struct cfs_migrater *cm = &per_cpu(cfs_migrater,
raw_smp_processor_id());
unsigned int cpu;

for_each_possible_cpu(cpu) {
@@ -12048,7 +12047,6 @@ static int __init cfs_migration_init(void)
}

WARN_ON_ONCE(smpboot_register_percpu_thread(&cfs_migration_threads));
- kthread_unpark(cm->thread);

return 0;
}

>
> [ 3.072411][ T1] WARNING: CPU: 0 PID: 1 at kernel/kthread.c:465 __kthread_bind_mask (kernel/kthread.c:465 (discriminator 1))
> [ 3.073411][ T1] Modules linked in:
> [ 3.074411][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.15.0-rc4-00071-g64228563c20f #1
> [ 3.075411][ T1] Hardware name: Dell Inc. OptiPlex 9020/0DNKMN, BIOS A05 12/05/2013
> [ 3.076411][ T1] RIP: 0010:__kthread_bind_mask (kernel/kthread.c:465 (discriminator 1))
> [ 3.077411][ T1] Code: 89 e2 b7 00 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 55 41 54 55 48 89 f5 89 d6 53 48 89 fb e8 28 bb 01 00 48 85 c0 75 09 <0f> 0b 5b 5d 41 5c 41 5d c3 4c 8d ab a4 0c 00 00 4c 89 ef e8 4b ed
> All code
> ========
> 0: 89 e2 mov %esp,%edx
> 2: b7 00 mov $0x0,%bh
> 4: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1)
> b: 00 00
> d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
> 12: 41 55 push %r13
> 14: 41 54 push %r12
> 16: 55 push %rbp
> 17: 48 89 f5 mov %rsi,%rbp
> 1a: 89 d6 mov %edx,%esi
> 1c: 53 push %rbx
> 1d: 48 89 fb mov %rdi,%rbx
> 20: e8 28 bb 01 00 callq 0x1bb4d
> 25: 48 85 c0 test %rax,%rax
> 28: 75 09 jne 0x33
> 2a:* 0f 0b ud2 <-- trapping instruction
> 2c: 5b pop %rbx
> 2d: 5d pop %rbp
> 2e: 41 5c pop %r12
> 30: 41 5d pop %r13
> 32: c3 retq
> 33: 4c 8d ab a4 0c 00 00 lea 0xca4(%rbx),%r13
> 3a: 4c 89 ef mov %r13,%rdi
> 3d: e8 .byte 0xe8
> 3e: 4b ed rex.WXB in (%dx),%eax
>
> Code starting with the faulting instruction
> ===========================================
> 0: 0f 0b ud2
> 2: 5b pop %rbx
> 3: 5d pop %rbp
> 4: 41 5c pop %r12
> 6: 41 5d pop %r13
> 8: c3 retq
> 9: 4c 8d ab a4 0c 00 00 lea 0xca4(%rbx),%r13
> 10: 4c 89 ef mov %r13,%rdi
> 13: e8 .byte 0xe8
> 14: 4b ed rex.WXB in (%dx),%eax
> [ 3.078411][ T1] RSP: 0000:ffffc9000002fdd8 EFLAGS: 00010246
> [ 3.079411][ T1] RAX: 0000000000000000 RBX: ffff888100aed000 RCX: 0000000000000000
> [ 3.080411][ T1] RDX: 0000000000000001 RSI: 0000000000000246 RDI: 00000000ffffffff
> [ 3.081411][ T1] RBP: ffffffff822101e0 R08: ffffffff8284cec8 R09: ffffffff8284cec8
> [ 3.082411][ T1] R10: 0000000000000000 R11: ffff8883fda278f0 R12: 0000000000000008
> [ 3.083411][ T1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
> [ 3.084411][ T1] FS: 0000000000000000(0000) GS:ffff8883fda00000(0000) knlGS:0000000000000000
> [ 3.085411][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 3.086411][ T1] CR2: ffff88841ea01000 CR3: 000000041da10001 CR4: 00000000001706f0
> [ 3.087411][ T1] Call Trace:
> [ 3.088413][ T1] kthread_unpark (kernel/kthread.c:478 kernel/kthread.c:570)
> [ 3.089411][ T1] cfs_migration_init (kernel/sched/fair.c:12029 (discriminator 3))
> [ 3.090412][ T1] ? setup_sched_thermal_decay_shift (kernel/sched/fair.c:12014)
> [ 3.091411][ T1] do_one_initcall (init/main.c:1303)
> [ 3.092412][ T1] kernel_init_freeable (init/main.c:1419 init/main.c:1603)
> [ 3.093412][ T1] ? rest_init (init/main.c:1497)
> [ 3.094411][ T1] kernel_init (init/main.c:1507)
> [ 3.095411][ T1] ret_from_fork (arch/x86/entry/entry_64.S:301)
> [ 3.096413][ T1] ---[ end trace 221e592f8f64f075 ]---
> [ 3.097411][ T1] rcu: Hierarchical SRCU implementation.
> [ 3.098989][ T5] NMI watchdog: Enabled. Permanently consumes one hw-PMU counter.
> [ 3.099473][ T1] smp: Bringing up secondary CPUs ...
> [ 3.100482][ T1] x86: Booting SMP configuration:
> [ 3.101412][ T1] .... node #0, CPUs: #1
> [ 0.534696][ T0] masked ExtINT on CPU#1
> [ 3.110490][ T1] #2
> [ 0.534696][ T0] masked ExtINT on CPU#2
> [ 3.117413][ T1] #3
> [ 0.534696][ T0] masked ExtINT on CPU#3
> [ 3.124184][ T1] #4
> [ 0.534696][ T0] masked ExtINT on CPU#4
> [ 3.130933][ T1] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
> [ 3.131497][ T1] #5
> [ 0.534696][ T0] masked ExtINT on CPU#5
> [ 3.138269][ T1] #6
> [ 0.534696][ T0] masked ExtINT on CPU#6
> [ 3.145166][ T1] #7
> [ 0.534696][ T0] masked ExtINT on CPU#7
> [ 3.152059][ T1] smp: Brought up 1 node, 8 CPUs
> [ 3.152412][ T1] smpboot: Max logical packages: 1
> [ 3.153411][ T1] smpboot: Total of 8 processors activated (54273.93 BogoMIPS)
> [ 3.177958][ T60] node 0 deferred pages initialised in 22ms
> [ 3.184695][ T1] devtmpfs: initialized
> [ 3.185443][ T1] x86/mm: Memory block size: 128MB
> [ 3.187216][ T1] ACPI: PM: Registering ACPI NVS region [mem 0xd1695000-0xd169bfff] (28672 bytes)
> [ 3.187412][ T1] ACPI: PM: Registering ACPI NVS region [mem 0xda71c000-0xda7fffff] (933888 bytes)
> [ 3.188450][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
> [ 3.189413][ T1] futex hash table entries: 2048 (order: 5, 131072 bytes, linear)
> [ 3.190454][ T1] pinctrl core: initialized pinctrl subsystem
> [ 3.191527][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
> [ 3.192555][ T1] audit: initializing netlink subsys (disabled)
> [ 3.193423][ T71] audit: type=2000 audit(1636161192.177:1): state=initialized audit_enabled=0 res=1
> [ 3.193471][ T1] thermal_sys: Registered thermal governor 'fair_share'
> [ 3.194412][ T1] thermal_sys: Registered thermal governor 'bang_bang'
> [ 3.195411][ T1] thermal_sys: Registered thermal governor 'step_wise'
> [ 3.196411][ T1] thermal_sys: Registered thermal governor 'user_space'
> [ 3.197420][ T1] cpuidle: using governor menu
> [ 3.199511][ T1] ACPI: bus type PCI registered
> [ 3.200412][ T1] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
> [ 3.201454][ T1] PCI: MMCONFIG for domain 0000 [bus 00-3f] at [mem 0xf8000000-0xfbffffff] (base 0xf8000000)
> [ 3.202412][ T1] PCI: MMCONFIG at [mem 0xf8000000-0xfbffffff] reserved in E820
> [ 3.203416][ T1] pmd_set_huge: Cannot satisfy [mem 0xf8000000-0xf8200000] with a huge-page mapping due to MTRR override.
> [ 3.204444][ T1] PCI: Using configuration type 1 for base access
> [ 3.205522][ T1] core: PMU erratum BJ122, BV98, HSD29 worked around, HT is on
> [ 3.207568][ T1] Kprobes globally optimized
> [ 3.208425][ T1] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
> [ 3.209412][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
> [ 3.210428][ T1] cryptd: max_cpu_qlen set to 1000
> [ 3.211440][ T1] ACPI: Added _OSI(Module Device)
> [ 3.212415][ T1] ACPI: Added _OSI(Processor Device)
> [ 3.213411][ T1] ACPI: Added _OSI(3.0 _SCP Extensions)
> [ 3.214411][ T1] ACPI: Added _OSI(Processor Aggregator Device)
> [ 3.215411][ T1] ACPI: Added _OSI(Linux-Dell-Video)
> [ 3.216411][ T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
> [ 3.217411][ T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
> [ 3.224227][ T1] ACPI: 6 ACPI AML tables successfully acquired and loaded
> [ 3.225178][ T1] ACPI: [Firmware Bug]: BIOS _OSI(Linux) query ignored
> [ 3.225803][ T1] ACPI: Dynamic OEM Table Load:
> [ 3.226414][ T1] ACPI: SSDT 0xFFFF88841EAB5000 0003D3 (v01 PmRef Cpu0Cst 00003001 INTL 20120711)
> [ 3.227913][ T1] ACPI: Dynamic OEM Table Load:
> [ 3.228414][ T1] ACPI: SSDT 0xFFFF88841EAC4000 0005AA (v01 PmRef ApIst 00003000 INTL 20120711)
> [ 3.229916][ T1] ACPI: Dynamic OEM Table Load:
> [ 3.230413][ T1] ACPI: SSDT 0xFFFF888100EF8800 000119 (v01 PmRef ApCst 00003000 INTL 20120711)
> [ 3.232725][ T1] ACPI: Interpreter enabled
> [ 3.233432][ T1] ACPI: PM: (supports S0 S3 S4 S5)
> [ 3.234411][ T1] ACPI: Using IOAPIC for interrupt routing
> [ 3.235430][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
> [ 3.236560][ T1] ACPI: Enabled 9 GPEs in block 00 to 3F
> [ 3.243366][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-3e])
> [ 3.243414][ T1] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
> [ 3.244781][ T1] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug SHPCHotplug PME AER PCIeCapability LTR]
> [ 3.245679][ T1] PCI host bridge to bus 0000:00
> [ 3.246412][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
> [ 3.247411][ T1] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window]
> [ 3.248411][ T1] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
> [ 3.249411][ T1] pci_bus 0000:00: root bus resource [mem 0x000d4000-0x000d7fff window]
> [ 3.250411][ T1] pci_bus 0000:00: root bus resource [mem 0x000d8000-0x000dbfff window]
> [ 3.251411][ T1] pci_bus 0000:00: root bus resource [mem 0x000dc000-0x000dffff window]
> [ 3.252411][ T1] pci_bus 0000:00: root bus resource [mem 0x000e0000-0x000e3fff window]
> [ 3.253411][ T1] pci_bus 0000:00: root bus resource [mem 0x000e4000-0x000e7fff window]
> [ 3.254411][ T1] pci_bus 0000:00: root bus resource [mem 0xdf200000-0xfeafffff window]
> [ 3.255411][ T1] pci_bus 0000:00: root bus resource [bus 00-3e]
> [ 3.256436][ T1] pci 0000:00:00.0: [8086:0c00] type 00 class 0x060000
> [ 3.257508][ T1] pci 0000:00:02.0: [8086:0412] type 00 class 0x030000
> [ 3.258416][ T1] pci 0000:00:02.0: reg 0x10: [mem 0xf7800000-0xf7bfffff 64bit]
> [ 3.259414][ T1] pci 0000:00:02.0: reg 0x18: [mem 0xe0000000-0xefffffff 64bit pref]
>
>
> To reproduce:
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> sudo bin/lkp install job.yaml # job file is attached in this email
> bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
> sudo bin/lkp run generated-yaml-file
>
> # if come across any failure that blocks the test,
> # please remove ~/.lkp and /lkp dir to run from a clean state.
>
>
>
> ---
> 0DAY/LKP+ Test Infrastructure Open Source Technology Center
> https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
>
> Thanks,
> Oliver Sang
>

--
Thanks
Yafang