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Date: Wed, 25 May 2022 15:56:51 +0800
From: kernel test robot <oliver.sang@...el.com>
To: hezhongkun <hezhongkun.hzk@...edance.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
cgroups@...r.kernel.org, linux-mm@...ck.org, lkp@...ts.01.org,
hannes@...xchg.org, mhocko@...nel.org, roman.gushchin@...ux.dev,
lizefan.x@...edance.com, Hezhongkun <hezhongkun.hzk@...edance.com>
Subject: [mm] 6adb0a02c2: WARNING:suspicious_RCU_usage
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 6adb0a02c27c8811bee9783451ee25155baf490e ("[PATCH] mm: memcontrol: add the mempolicy interface for cgroup v2.")
url: https://github.com/intel-lab-lkp/linux/commits/hezhongkun/mm-memcontrol-add-the-mempolicy-interface-for-cgroup-v2/20220524-183922
base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git 143a6252e1b8ab424b4b293512a97cca7295c182
patch link: https://lore.kernel.org/lkml/20220524103638.473-1-hezhongkun.hzk@bytedance.com
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 1.775514][ T2] WARNING: suspicious RCU usage
[ 1.776115][ T2] 5.18.0-01158-g6adb0a02c27c #10 Not tainted
[ 1.776513][ T2] -----------------------------
[ 1.777133][ T2] include/linux/cgroup.h:495 suspicious rcu_dereference_check() usage!
[ 1.777513][ T2]
[ 1.777513][ T2] other info that might help us debug this:
[ 1.777513][ T2]
[ 1.778513][ T2]
[ 1.778513][ T2] rcu_scheduler_active = 1, debug_locks = 1
[ 1.779493][ T2] no locks held by kthreadd/2.
[ 1.779514][ T2]
[ 1.779514][ T2] stack backtrace:
[ 1.780272][ T2] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.18.0-01158-g6adb0a02c27c #10
[ 1.780509][ T2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 1.780509][ T2] Call Trace:
[ 1.780509][ T2] <TASK>
[ 1.780509][ T2] dump_stack_lvl (kbuild/src/x86_64-2/lib/dump_stack.c:107 (discriminator 4))
[ 1.780509][ T2] mem_cgroup_from_task (kbuild/src/x86_64-2/include/linux/cgroup.h:495 kbuild/src/x86_64-2/mm/memcontrol.c:909)
[ 1.780509][ T2] get_cgrp_or_task_policy (kbuild/src/x86_64-2/mm/mempolicy.c:184)
[ 1.780509][ T2] alloc_pages (kbuild/src/x86_64-2/mm/mempolicy.c:2280)
[ 1.780509][ T2] allocate_slab (kbuild/src/x86_64-2/mm/slub.c:1799 kbuild/src/x86_64-2/mm/slub.c:1944)
[ 1.780509][ T2] ___slab_alloc (kbuild/src/x86_64-2/mm/slub.c:3005)
[ 1.780509][ T2] ? dup_task_struct (kbuild/src/x86_64-2/kernel/fork.c:172 kbuild/src/x86_64-2/kernel/fork.c:971)
[ 1.780509][ T2] kmem_cache_alloc_node (kbuild/src/x86_64-2/mm/slub.c:3092 kbuild/src/x86_64-2/mm/slub.c:3183 kbuild/src/x86_64-2/mm/slub.c:3267)
[ 1.780509][ T2] dup_task_struct (kbuild/src/x86_64-2/kernel/fork.c:172 kbuild/src/x86_64-2/kernel/fork.c:971)
[ 1.780509][ T2] ? trace_hardirqs_on (kbuild/src/x86_64-2/kernel/trace/trace_preemptirq.c:50 (discriminator 22))
[ 1.780509][ T2] copy_process (kbuild/src/x86_64-2/kernel/fork.c:2073)
[ 1.780509][ T2] ? alloc_chain_hlocks (kbuild/src/x86_64-2/kernel/locking/lockdep.c:3455)
[ 1.780509][ T2] ? add_chain_cache (kbuild/src/x86_64-2/kernel/locking/lockdep.c:3664)
[ 1.780509][ T2] ? __lock_acquire (kbuild/src/x86_64-2/kernel/locking/lockdep.c:5029)
[ 1.780509][ T2] ? __cleanup_sighand (kbuild/src/x86_64-2/kernel/fork.c:1982)
[ 1.780509][ T2] ? finish_task_switch+0x20f/0x900
[ 1.780509][ T2] ? check_prev_add (kbuild/src/x86_64-2/kernel/locking/lockdep.c:3759)
[ 1.780509][ T2] ? __lock_release (kbuild/src/x86_64-2/kernel/locking/lockdep.c:5317)
[ 1.780509][ T2] kernel_clone (kbuild/src/x86_64-2/kernel/fork.c:2644)
[ 1.780509][ T2] ? create_io_thread (kbuild/src/x86_64-2/kernel/fork.c:2604)
[ 1.780509][ T2] ? __lock_acquire (kbuild/src/x86_64-2/kernel/locking/lockdep.c:5029)
[ 1.780509][ T2] ? finish_task_switch+0x214/0x900
[ 1.780509][ T2] ? find_held_lock (kbuild/src/x86_64-2/kernel/locking/lockdep.c:5132)
[ 1.780509][ T2] kernel_thread (kbuild/src/x86_64-2/kernel/fork.c:2687)
[ 1.780509][ T2] ? __ia32_sys_clone3 (kbuild/src/x86_64-2/kernel/fork.c:2687)
[ 1.780509][ T2] ? lock_downgrade (kbuild/src/x86_64-2/kernel/locking/lockdep.c:5293)
[ 1.780509][ T2] ? kthread_complete_and_exit (kbuild/src/x86_64-2/kernel/kthread.c:331)
[ 1.780509][ T2] ? kthreadd (kbuild/src/x86_64-2/kernel/kthread.c:396 kbuild/src/x86_64-2/kernel/kthread.c:745)
[ 1.780509][ T2] ? do_raw_spin_unlock (kbuild/src/x86_64-2/arch/x86/include/asm/atomic.h:29 kbuild/src/x86_64-2/include/linux/atomic/atomic-instrumented.h:28 kbuild/src/x86_64-2/include/asm-generic/qspinlock.h:28 kbuild/src/x86_64-2/kernel/locking/spinlock_debug.c:100 kbuild/src/x86_64-2/kernel/locking/spinlock_debug.c:140)
[ 1.780509][ T2] kthreadd (kbuild/src/x86_64-2/kernel/kthread.c:400 kbuild/src/x86_64-2/kernel/kthread.c:745)
[ 1.780509][ T2] ? kthread_is_per_cpu (kbuild/src/x86_64-2/kernel/kthread.c:718)
[ 1.780509][ T2] ret_from_fork (kbuild/src/x86_64-2/arch/x86/entry/entry_64.S:308)
[ 1.780509][ T2] </TASK>
[ 1.781590][ T1] cblist_init_generic: Setting adjustable number of callback queues.
[ 1.782518][ T1] cblist_init_generic: Setting shift to 1 and lim to 1.
[ 1.783730][ T1] cblist_init_generic: Setting shift to 1 and lim to 1.
[ 1.784646][ T1] Running RCU-tasks wait API self tests
[ 1.785657][ T1] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only.
[ 1.787556][ T1] rcu: Hierarchical SRCU implementation.
[ 1.791308][ T1] NMI watchdog: Perf NMI watchdog permanently disabled
[ 1.792109][ T1] smp: Bringing up secondary CPUs ...
[ 1.793634][ T1] x86: Booting SMP configuration:
[ 1.794300][ T1] .... node #0, CPUs: #1
[ 0.090644][ T0] masked ExtINT on CPU#1
[ 1.797615][ T1] smp: Brought up 1 node, 2 CPUs
[ 1.798527][ T1] smpboot: Max logical packages: 1
[ 1.799519][ T1] smpboot: Total of 2 processors activated (8380.31 BogoMIPS)
[ 1.802552][ T11] Callback from call_rcu_tasks_trace() invoked.
[ 1.898728][ T10] Callback from call_rcu_tasks_rude() invoked.
[ 1.998585][ T22] node 0 deferred pages initialised in 196ms
[ 2.099652][ T1] allocated 268435456 bytes of page_ext
[ 2.100769][ T1] Node 0, zone DMA: page owner found early allocated 0 pages
[ 2.106388][ T1] Node 0, zone DMA32: page owner found early allocated 0 pages
[ 2.143231][ T1] Node 0, zone Normal: page owner found early allocated 66872 pages
[ 2.145828][ T1] devtmpfs: initialized
[ 2.147626][ T1] x86/mm: Memory block size: 128MB
[ 2.195988][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[ 2.197567][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear)
[ 2.199426][ T1] pinctrl core: initialized pinctrl subsystem
[ 2.212984][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 2.217521][ T1] audit: initializing netlink subsys (disabled)
[ 2.219652][ T27] audit: type=2000 audit(1653397015.364:1): state=initialized audit_enabled=0 res=1
[ 2.222174][ T1] thermal_sys: Registered thermal governor 'fair_share'
[ 2.222184][ T1] thermal_sys: Registered thermal governor 'bang_bang'
[ 2.222529][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 2.223522][ T1] thermal_sys: Registered thermal governor 'user_space'
[ 2.224756][ T1] cpuidle: using governor menu
[ 2.227738][ T1] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 2.229834][ T1] PCI: Using configuration type 1 for base access
[ 2.279233][ T1] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible.
[ 2.281673][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 2.285568][ T1] cryptd: max_cpu_qlen set to 1000
[ 2.291676][ T1] ACPI: Added _OSI(Module Device)
[ 2.292523][ T1] ACPI: Added _OSI(Processor Device)
[ 2.293523][ T1] ACPI: Added _OSI(3.0 _SCP Extensions)
[ 2.294523][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 2.295547][ T1] ACPI: Added _OSI(Linux-Dell-Video)
[ 2.296535][ T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[ 2.297539][ T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[ 2.347738][ T1] ACPI: 1 ACPI AML tables successfully acquired and loaded
[ 2.363724][ T1] ACPI: Interpreter enabled
[ 2.364811][ T1] ACPI: PM: (supports S0 S3 S4 S5)
[ 2.365567][ T1] ACPI: Using IOAPIC for interrupt routing
[ 2.366799][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 2.370916][ T1] ACPI: Enabled 2 GPEs in block 00 to 0F
To reproduce:
# build kernel
cd linux
cp config-5.18.0-01158-g6adb0a02c27c .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
# if come across any failure that blocks the test,
# please remove ~/.lkp and /lkp dir to run from a clean state.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-5.18.0-01158-g6adb0a02c27c" of type "text/plain" (167364 bytes)
View attachment "job-script" of type "text/plain" (4768 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (13732 bytes)
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