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Date: Wed, 5 Jan 2022 10:17:29 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Imran Khan <imran.f.khan@...cle.com>
Cc: 0day robot <lkp@...el.com>, LKML <linux-kernel@...r.kernel.org>,
lkp@...ts.01.org, gregkh@...uxfoundation.org, tj@...nel.org
Subject: [kernfs] 3dd2a5f81a: INFO:trying_to_register_non-static_key
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 3dd2a5f81a41be1f22391cc8ef0ac78293de0141 ("[RFC PATCH v2 2/2] kernfs: Reduce contention around global per-fs kernfs_rwsem.")
url: https://github.com/0day-ci/linux/commits/Imran-Khan/kernfs-use-kernfs_node-specific-mutex-and-spinlock/20220103-164752
patch link: https://lore.kernel.org/lkml/20220103084544.1109829-3-imran.f.khan@oracle.com
in testcase: rcuscale
version:
with following parameters:
runtime: 300s
scale_type: srcud
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):
+-----------------------------------------------+------------+------------+
| | 0fc4d2a7a9 | 3dd2a5f81a |
+-----------------------------------------------+------------+------------+
| INFO:trying_to_register_non-static_key | 0 | 60 |
| WARNING:at_kernel/locking/rwsem.c:#down_write | 0 | 60 |
| EIP:down_write | 0 | 60 |
| WARNING:at_kernel/locking/rwsem.c:#up_write | 0 | 60 |
| EIP:up_write | 0 | 60 |
+-----------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 0.740605][ T0] INFO: trying to register non-static key.
[ 0.741504][ T0] The code is fine but needs lockdep annotation, or maybe
[ 0.742530][ T0] you didn't initialize this object before use?
[ 0.743485][ T0] turning off the locking correctness validator.
[ 0.743838][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 5.16.0-rc6-next-20211224-00002-g3dd2a5f81a41 #7
[ 0.743838][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 0.743838][ T0] Call Trace:
[ 0.743838][ T0] dump_stack_lvl (kbuild/src/rand-2/lib/dump_stack.c:108)
[ 0.743838][ T0] dump_stack (kbuild/src/rand-2/lib/dump_stack.c:114)
[ 0.743838][ T0] register_lock_class (kbuild/src/rand-2/kernel/locking/lockdep.c:952 kbuild/src/rand-2/kernel/locking/lockdep.c:1263)
[ 0.743838][ T0] ? sched_clock_cpu (kbuild/src/rand-2/kernel/sched/clock.c:382)
[ 0.743838][ T0] __lock_acquire (kbuild/src/rand-2/kernel/locking/lockdep.c:4907)
[ 0.743838][ T0] lock_acquire (kbuild/src/rand-2/kernel/locking/lockdep.c:438 kbuild/src/rand-2/kernel/locking/lockdep.c:5641 kbuild/src/rand-2/kernel/locking/lockdep.c:5604)
[ 0.743838][ T0] ? kernfs_add_one (kbuild/src/rand-2/fs/kernfs/dir.c:754)
[ 0.743838][ T0] down_write (kbuild/src/rand-2/kernel/locking/rwsem.c:1278 kbuild/src/rand-2/kernel/locking/rwsem.c:1515)
[ 0.743838][ T0] ? kernfs_add_one (kbuild/src/rand-2/fs/kernfs/dir.c:754)
[ 0.743838][ T0] kernfs_add_one (kbuild/src/rand-2/fs/kernfs/dir.c:754)
[ 0.743838][ T0] kernfs_create_dir_ns (kbuild/src/rand-2/fs/kernfs/dir.c:1009)
[ 0.743838][ T0] sysfs_create_dir_ns (kbuild/src/rand-2/include/linux/err.h:36 kbuild/src/rand-2/fs/sysfs/dir.c:61)
[ 0.743838][ T0] kobject_add_internal (kbuild/src/rand-2/lib/kobject.c:89 (discriminator 11) kbuild/src/rand-2/lib/kobject.c:255 (discriminator 11))
[ 0.743838][ T0] ? kfree_const (kbuild/src/rand-2/mm/util.c:41)
[ 0.743838][ T0] ? kobject_set_name_vargs (kbuild/src/rand-2/lib/kobject.c:312)
[ 0.743838][ T0] kobject_add (kbuild/src/rand-2/lib/kobject.c:390 kbuild/src/rand-2/lib/kobject.c:442)
[ 0.743838][ T0] kobject_create_and_add (kbuild/src/rand-2/lib/kobject.c:815)
[ 0.743838][ T0] mnt_init (kbuild/src/rand-2/fs/namespace.c:4373)
[ 0.743838][ T0] vfs_caches_init (kbuild/src/rand-2/fs/dcache.c:3295)
[ 0.743838][ T0] start_kernel (kbuild/src/rand-2/init/main.c:1123)
[ 0.743838][ T0] ? early_idt_handler_common (kbuild/src/rand-2/arch/x86/kernel/head_32.S:417)
[ 0.743838][ T0] i386_start_kernel (kbuild/src/rand-2/arch/x86/kernel/head32.c:57)
[ 0.743838][ T0] startup_32_smp (kbuild/src/rand-2/arch/x86/kernel/head_32.S:328)
[ 0.743841][ T0] ------------[ cut here ]------------
[ 0.747174][ T0] DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x0, magic = 0x0, owner = 0x0, curr 0xc24ce5c0, list not empty
[ 0.748936][ T0] WARNING: CPU: 0 PID: 0 at kernel/locking/rwsem.c:1278 down_write (kbuild/src/rand-2/kernel/locking/rwsem.c:1278 kbuild/src/rand-2/kernel/locking/rwsem.c:1515)
[ 0.750268][ T0] Modules linked in:
[ 0.750508][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 5.16.0-rc6-next-20211224-00002-g3dd2a5f81a41 #7
[ 0.751888][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 0.753284][ T0] EIP: down_write (kbuild/src/rand-2/kernel/locking/rwsem.c:1278 kbuild/src/rand-2/kernel/locking/rwsem.c:1515)
[ 0.753841][ T0] Code: 8b 46 3c 8b 1d e4 26 4e c2 c7 04 24 c8 74 33 c2 89 54 24 08 ba 73 74 33 c2 89 5c 24 14 89 44 24 0c 89 54 24 04 e8 55 e1 f5 ff <0f> 0b 31 c9 ba 01 00 00 00 c7 04 24 01 00 00 00 b8 e8 19 ae c2 e8
All code
========
0: 8b 46 3c mov 0x3c(%rsi),%eax
3: 8b 1d e4 26 4e c2 mov -0x3db1d91c(%rip),%ebx # 0xffffffffc24e26ed
9: c7 04 24 c8 74 33 c2 movl $0xc23374c8,(%rsp)
10: 89 54 24 08 mov %edx,0x8(%rsp)
14: ba 73 74 33 c2 mov $0xc2337473,%edx
19: 89 5c 24 14 mov %ebx,0x14(%rsp)
1d: 89 44 24 0c mov %eax,0xc(%rsp)
21: 89 54 24 04 mov %edx,0x4(%rsp)
25: e8 55 e1 f5 ff callq 0xfffffffffff5e17f
2a:* 0f 0b ud2 <-- trapping instruction
2c: 31 c9 xor %ecx,%ecx
2e: ba 01 00 00 00 mov $0x1,%edx
33: c7 04 24 01 00 00 00 movl $0x1,(%rsp)
3a: b8 e8 19 ae c2 mov $0xc2ae19e8,%eax
3f: e8 .byte 0xe8
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 31 c9 xor %ecx,%ecx
4: ba 01 00 00 00 mov $0x1,%edx
9: c7 04 24 01 00 00 00 movl $0x1,(%rsp)
10: b8 e8 19 ae c2 mov $0xc2ae19e8,%eax
15: e8 .byte 0xe8
[ 0.757174][ T0] EAX: 0000006f EBX: c24ce5c0 ECX: 00000000 EDX: 00000000
[ 0.758206][ T0] ESI: c40110f4 EDI: c4011134 EBP: c24bde4c ESP: c24bde24
[ 0.759202][ T0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210282
[ 0.760303][ T0] CR0: 80050033 CR2: ffdd9000 CR3: 02c6f000 CR4: 00040690
[ 0.760509][ T0] Call Trace:
[ 0.761040][ T0] kernfs_add_one (kbuild/src/rand-2/fs/kernfs/dir.c:754)
[ 0.761714][ T0] kernfs_create_dir_ns (kbuild/src/rand-2/fs/kernfs/dir.c:1009)
[ 0.762449][ T0] sysfs_create_dir_ns (kbuild/src/rand-2/include/linux/err.h:36 kbuild/src/rand-2/fs/sysfs/dir.c:61)
[ 0.763842][ T0] kobject_add_internal (kbuild/src/rand-2/lib/kobject.c:89 (discriminator 11) kbuild/src/rand-2/lib/kobject.c:255 (discriminator 11))
[ 0.764643][ T0] ? kfree_const (kbuild/src/rand-2/mm/util.c:41)
[ 0.765371][ T0] ? kobject_set_name_vargs (kbuild/src/rand-2/lib/kobject.c:312)
[ 0.766137][ T0] kobject_add (kbuild/src/rand-2/lib/kobject.c:390 kbuild/src/rand-2/lib/kobject.c:442)
[ 0.766769][ T0] kobject_create_and_add (kbuild/src/rand-2/lib/kobject.c:815)
[ 0.767175][ T0] mnt_init (kbuild/src/rand-2/fs/namespace.c:4373)
[ 0.767784][ T0] vfs_caches_init (kbuild/src/rand-2/fs/dcache.c:3295)
[ 0.768572][ T0] start_kernel (kbuild/src/rand-2/init/main.c:1123)
[ 0.769246][ T0] ? early_idt_handler_common (kbuild/src/rand-2/arch/x86/kernel/head_32.S:417)
[ 0.770508][ T0] i386_start_kernel (kbuild/src/rand-2/arch/x86/kernel/head32.c:57)
[ 0.771192][ T0] startup_32_smp (kbuild/src/rand-2/arch/x86/kernel/head_32.S:328)
[ 0.771873][ T0] irq event stamp: 1153
[ 0.772517][ T0] hardirqs last enabled at (1153): _raw_spin_unlock_irqrestore (kbuild/src/rand-2/arch/x86/include/asm/irqflags.h:45 kbuild/src/rand-2/arch/x86/include/asm/irqflags.h:80 kbuild/src/rand-2/arch/x86/include/asm/irqflags.h:138 kbuild/src/rand-2/include/linux/spinlock_api_smp.h:151 kbuild/src/rand-2/kernel/locking/spinlock.c:194)
[ 0.773841][ T0] hardirqs last disabled at (1152): _raw_spin_lock_irqsave (kbuild/src/rand-2/include/linux/spinlock_api_smp.h:108 kbuild/src/rand-2/kernel/locking/spinlock.c:162)
[ 0.775115][ T0] softirqs last enabled at (0): 0x0
[ 0.776015][ T0] softirqs last disabled at (0): 0x0
[ 0.777174][ T0] ---[ end trace 0000000000000000 ]---
[ 0.777917][ T0] ------------[ cut here ]------------
[ 0.778654][ T0] DEBUG_RWSEMS_WARN_ON(sem->magic != sem): count = 0x1, magic = 0x0, owner = 0xc24ce5c0, curr 0xc24ce5c0, list not empty
To reproduce:
# build kernel
cd linux
cp config-5.16.0-rc6-next-20211224-00002-g3dd2a5f81a41 .config
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-9 CC=gcc-9 ARCH=i386 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.
---
0DAY/LKP+ Test Infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation
Thanks,
Oliver Sang
View attachment "config-5.16.0-rc6-next-20211224-00002-g3dd2a5f81a41" of type "text/plain" (144051 bytes)
View attachment "job-script" of type "text/plain" (4787 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (19372 bytes)
View attachment "rcuscale" of type "text/plain" (6853 bytes)
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