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Message-ID: <20211110063928.GB30217@xsang-OptiPlex-9020>
Date: Wed, 10 Nov 2021 14:39:28 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Kuniyuki Iwashima <kuniyu@...zon.co.jp>
Cc: lkp@...ts.01.org, lkp@...el.com,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Kuniyuki Iwashima <kuniyu@...zon.co.jp>,
Kuniyuki Iwashima <kuni1840@...il.com>,
Benjamin Herrenschmidt <benh@...zon.com>,
netdev@...r.kernel.org
Subject: [af_unix] 95e381b609: WARNING:possible_recursive_locking_detected
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 95e381b6095d0808a64ecbe36515cca2ea2df477 ("[PATCH net-next 12/13] af_unix: Replace the big lock with small locks.")
url: https://github.com/0day-ci/linux/commits/Kuniyuki-Iwashima/af_unix-Replace-unix_table_lock-with-per-hash-locks/20211106-172208
base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git 84882cf72cd774cf16fd338bdbf00f69ac9f9194
patch link: https://lore.kernel.org/netdev/20211106091712.15206-13-kuniyu@amazon.co.jp
in testcase: kernel-selftests
version: kernel-selftests-x86_64-c8c9111a-1_20210929
with following parameters:
group: x86
ucode: 0xde
test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
on test machine: 4 threads 1 sockets Intel(R) Core(TM) i7-7567U CPU @ 3.50GHz with 32G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+---------------------------------------------+------------+------------+
| | 5c1456529e | 95e381b609 |
+---------------------------------------------+------------+------------+
| boot_successes | 4 | 0 |
| boot_failures | 0 | 4 |
| WARNING:possible_recursive_locking_detected | 0 | 4 |
+---------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
kern :warn : [ 39.215794] WARNING: possible recursive locking detected
kern :warn : [ 39.216286] 5.15.0-rc7-02477-g95e381b6095d #1 Not tainted
kern :warn : [ 39.216816] --------------------------------------------
kern :warn : [ 39.217306] systemd/1 is trying to acquire lock:
kern :warn : [ 39.217783] ffffffff87c53fb8 (&unix_table_locks[i]){+.+.}-{2:2}, at: unix_bind (net/unix/af_unix.c:1176 net/unix/af_unix.c:1253)
kern :warn : [ 39.218514]
but task is already holding lock:
kern :warn : [ 39.219142] ffffffff87c4de38 (&unix_table_locks[i]){+.+.}-{2:2}, at: unix_table_double_lock (net/unix/af_unix.c:170)
kern :warn : [ 39.219969]
other info that might help us debug this:
kern :warn : [ 39.220611] Possible unsafe locking scenario:
kern :warn : [ 39.221209] CPU0
kern :warn : [ 39.221499] ----
kern :warn : [ 39.221789] lock(&unix_table_locks[i]);
kern :warn : [ 39.222191] lock(&unix_table_locks[i]);
kern :warn : [ 39.222592]
*** DEADLOCK ***
kern :warn : [ 39.223256] May be due to missing lock nesting notation
kern :warn : [ 39.223919] 4 locks held by systemd/1:
kern :warn : [ 39.224301] #0: ffff8888765ca448 (sb_writers#6){.+.+}-{0:0}, at: filename_create (fs/namei.c:3656)
kern :warn : [ 39.225037] #1: ffff888100275280 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: filename_create (fs/namei.c:3657)
kern :warn : [ 39.225863] #2: ffff888874f82e18 (&u->bindlock){+.+.}-{3:3}, at: unix_bind (net/unix/af_unix.c:1168 net/unix/af_unix.c:1253)
kern :warn : [ 39.226571] #3: ffffffff87c4de38 (&unix_table_locks[i]){+.+.}-{2:2}, at: unix_table_double_lock (net/unix/af_unix.c:170)
kern :warn : [ 39.227394]
stack backtrace:
kern :warn : [ 39.227885] CPU: 2 PID: 1 Comm: systemd Not tainted 5.15.0-rc7-02477-g95e381b6095d #1
kern :warn : [ 39.228571] Hardware name: Intel Corporation NUC7i7BNH/NUC7i7BNB, BIOS BNKBL357.86A.0067.2018.0814.1500 08/14/2018
kern :warn : [ 39.229434] Call Trace:
kern :warn : [ 39.229727] dump_stack_lvl (lib/dump_stack.c:107)
kern :warn : [ 39.230107] __lock_acquire.cold (kernel/locking/lockdep.c:2944 kernel/locking/lockdep.c:2987 kernel/locking/lockdep.c:3776 kernel/locking/lockdep.c:5015)
kern :warn : [ 39.230530] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4873)
kern :warn : [ 39.231012] ? lock_is_held_type (kernel/locking/lockdep.c:438 kernel/locking/lockdep.c:5669)
kern :warn : [ 39.231426] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4873)
kern :warn : [ 39.231907] ? lock_is_held_type (kernel/locking/lockdep.c:438 kernel/locking/lockdep.c:5669)
kern :warn : [ 39.232321] ? rcu_read_lock_sched_held (include/linux/lockdep.h:283 kernel/rcu/update.c:125)
kern :warn : [ 39.232779] lock_acquire (kernel/locking/lockdep.c:438 kernel/locking/lockdep.c:5627 kernel/locking/lockdep.c:5590)
kern :warn : [ 39.233155] ? unix_bind (net/unix/af_unix.c:1176 net/unix/af_unix.c:1253)
kern :warn : [ 39.233533] ? rcu_read_unlock (include/linux/rcupdate.h:716 (discriminator 5))
kern :warn : [ 39.233932] ? do_raw_spin_lock (arch/x86/include/asm/atomic.h:202 include/linux/atomic/atomic-instrumented.h:513 include/asm-generic/qspinlock.h:82 kernel/locking/spinlock_debug.c:115)
kern :warn : [ 39.234346] ? rwlock_bug+0xc0/0xc0
kern :warn : [ 39.234757] _raw_spin_lock (include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:154)
kern :warn : [ 39.235135] ? unix_bind (net/unix/af_unix.c:1176 net/unix/af_unix.c:1253)
kern :warn : [ 39.235513] unix_bind (net/unix/af_unix.c:1176 net/unix/af_unix.c:1253)
kern :warn : [ 39.235880] ? unix_socketpair (net/unix/af_unix.c:1239)
kern :warn : [ 39.236289] ? _copy_from_user (arch/x86/include/asm/uaccess_64.h:46 arch/x86/include/asm/uaccess_64.h:52 lib/usercopy.c:16)
kern :warn : [ 39.236694] __sys_bind (net/socket.c:1693)
kern :warn : [ 39.237061] ? __ia32_sys_socketpair (net/socket.c:1680)
kern :warn : [ 39.237504] ? lock_is_held_type (kernel/locking/lockdep.c:438 kernel/locking/lockdep.c:5669)
kern :warn : [ 39.237919] ? lock_is_held_type (kernel/locking/lockdep.c:438 kernel/locking/lockdep.c:5669)
kern :warn : [ 39.238332] ? syscall_enter_from_user_mode (kernel/entry/common.c:107)
kern :warn : [ 39.241493] ? rcu_read_lock_sched_held (include/linux/lockdep.h:283 kernel/rcu/update.c:125)
kern :warn : [ 39.241951] ? rcu_read_lock_bh_held (kernel/rcu/update.c:120)
kern :warn : [ 39.242382] ? do_syscall_64 (arch/x86/entry/common.c:87)
kern :warn : [ 39.242768] __x64_sys_bind (net/socket.c:1702)
kern :warn : [ 39.243145] ? syscall_enter_from_user_mode (arch/x86/include/asm/irqflags.h:45 arch/x86/include/asm/irqflags.h:80 kernel/entry/common.c:107)
kern :warn : [ 39.243620] do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80)
kern :warn : [ 39.243994] ? do_syscall_64 (arch/x86/entry/common.c:87)
kern :warn : [ 39.244378] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4344)
kern :warn : [ 39.244803] ? do_syscall_64 (arch/x86/entry/common.c:87)
kern :warn : [ 39.245188] ? do_syscall_64 (arch/x86/entry/common.c:87)
kern :warn : [ 39.245571] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4344)
kern :warn : [ 39.245997] ? do_syscall_64 (arch/x86/entry/common.c:87)
kern :warn : [ 39.246380] ? asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:638)
kern :warn : [ 39.246873] ? asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:638)
kern :warn : [ 39.247359] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4344)
kern :warn : [ 39.247786] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:113)
kern :warn : [ 39.248260] RIP: 0033:0x7f84b7e22497
kern :warn : [ 39.248632] Code: ff ff ff ff c3 48 8b 15 f7 09 0c 00 f7 d8 64 89 02 b8 ff ff ff ff eb ba 66 2e 0f 1f 84 00 00 00 00 00 90 b8 31 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c9 09 0c 00 f7 d8 64 89 01 48
All code
========
0: ff (bad)
1: ff (bad)
2: ff (bad)
3: ff c3 inc %ebx
5: 48 8b 15 f7 09 0c 00 mov 0xc09f7(%rip),%rdx # 0xc0a03
c: f7 d8 neg %eax
e: 64 89 02 mov %eax,%fs:(%rdx)
11: b8 ff ff ff ff mov $0xffffffff,%eax
16: eb ba jmp 0xffffffffffffffd2
18: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
1f: 00 00 00
22: 90 nop
23: b8 31 00 00 00 mov $0x31,%eax
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 retq
33: 48 8b 0d c9 09 0c 00 mov 0xc09c9(%rip),%rcx # 0xc0a03
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 retq
9: 48 8b 0d c9 09 0c 00 mov 0xc09c9(%rip),%rcx # 0xc09d9
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
kern :warn : [ 39.250101] RSP: 002b:00007ffd7751fa58 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
kern :warn : [ 39.250770] RAX: ffffffffffffffda RBX: 0000559d4fc70bb0 RCX: 00007f84b7e22497
kern :warn : [ 39.251406] RDX: 0000000000000016 RSI: 00007ffd7751fa70 RDI: 000000000000000f
kern :warn : [ 39.252042] RBP: 00007ffd7751fa70 R08: 000000000000000c R09: 0000559d4fcd6670
kern :warn : [ 39.252679] R10: 00007ffd7751fa24 R11: 0000000000000246 R12: 000000000000000f
kern :warn : [ 39.253314] R13: 0000000000000016 R14: 00007ffd7751fb50 R15: 00007ffd7751fb48
kern :notice: [ 39.425532] random: systemd-random-: uninitialized urandom read (512 bytes read)
kern :info : [ 39.905355] intel_pmc_core INT33A1:00: initialized
kern :debug : [ 40.139879] IOAPIC[2]: Set IRTE entry (P:1 FPD:0 Dst_Mode:1 Redir_hint:1 Trig_Mode:0 Dlvry_Mode:0 Avail:0 Vector:EF Dest:00000001 SID:F0F8 SQ:0 SVT:1)
kern :debug : [ 40.141118] IOAPIC[0]: Preconfigured routing entry (2-18 -> IRQ 18 Level:1 ActiveLow:1)
kern :info : [ 40.186707] mei_me 0000:00:16.0: enabling device (0004 -> 0006)
kern :debug : [ 40.196333] libata version 3.00 loaded.
kern :notice: [ 40.361505] random: dbus-daemon: uninitialized urandom read (12 bytes read)
kern :notice: [ 40.365282] random: dbus-daemon: uninitialized urandom read (12 bytes read)
kern :info : [ 40.969470] microcode: updated to revision 0xde, date = 2020-05-27
kern :warn : [ 40.970115] x86/CPU: CPU features have changed after loading microcode, but might not take effect.
kern :warn : [ 40.971061] x86/CPU: Please consider either early loading through initrd/built-in or a potential BIOS update.
kern :info : [ 40.971992] microcode: Reload completed, microcode revision: 0xde
kern :info : [ 41.013694] i801_smbus 0000:00:1f.4: SPD Write Disable is set
kern :info : [ 41.014375] i801_smbus 0000:00:1f.4: SMBus using PCI interrupt
kern :info : [ 41.015800] IPMI message handler: version 39.2
kern :info : [ 41.022407] iTCO_wdt iTCO_wdt: Found a Intel PCH TCO device (Version=4, TCOBASE=0x0400)
kern :info : [ 41.023587] ipmi device interface
kern :info : [ 41.033277] iTCO_wdt iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
kern :notice: [ 41.048766] random: ln: uninitialized urandom read (6 bytes read)
kern :debug : [ 41.068893] ahci 0000:00:17.0: version 3.0
kern :info : [ 41.115078] ipmi_si: IPMI System Interface driver
kern :warn : [ 41.117158] ipmi_si: Unable to find any System Interface(s)
kern :info : [ 41.117819] ahci 0000:00:17.0: AHCI 0001.0301 32 slots 2 ports 6 Gbps 0x5 impl SATA mode
kern :info : [ 41.118556] ahci 0000:00:17.0: flags: 64bit ncq pm led clo only pio slum part deso sadm sds apst
kern :notice: [ 41.138009] random: ln: uninitialized urandom read (6 bytes read)
kern :info : [ 41.170985] RAPL PMU: API unit is 2^-32 Joules, 5 fixed counters, 655360 ms ovfl timer
kern :info : [ 41.171706] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules
kern :info : [ 41.172240] RAPL PMU: hw unit of domain package 2^-14 Joules
kern :info : [ 41.172781] RAPL PMU: hw unit of domain dram 2^-14 Joules
kern :info : [ 41.173296] RAPL PMU: hw unit of domain pp1-gpu 2^-14 Joules
kern :info : [ 41.174495] RAPL PMU: hw unit of domain psys 2^-14 Joules
kern :info : [ 41.220484] scsi host0: ahci
kern :info : [ 41.235600] i2c i2c-0: 2/2 memory slots populated (from DMI)
kern :info : [ 41.236463] scsi host1: ahci
kern :info : [ 41.243332] i2c i2c-0: Successfully instantiated SPD at 0x50
kern :info : [ 41.251989] scsi host2: ahci
kern :info : [ 41.254369] ata1: SATA max UDMA/133 abar m2048@...c24b000 port 0xdc24b100 irq 129
kern :info : [ 41.255076] ata2: DUMMY
kern :info : [ 41.255403] ata3: SATA max UDMA/133 abar m2048@...c24b000 port 0xdc24b200 irq 129
kern :info : [ 41.428685] i915 0000:00:02.0: [drm] Found 64MB of eDRAM
kern :info : [ 41.429635] i915 0000:00:02.0: vgaarb: deactivate vga console
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
View attachment "config-5.15.0-rc7-02477-g95e381b6095d" of type "text/plain" (176779 bytes)
View attachment "job-script" of type "text/plain" (5976 bytes)
Download attachment "kmsg.xz" of type "application/x-xz" (40396 bytes)
View attachment "kernel-selftests" of type "text/plain" (141325 bytes)
View attachment "job.yaml" of type "text/plain" (4888 bytes)
View attachment "reproduce" of type "text/plain" (147 bytes)
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