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Message-ID: <202209211556.e602187-yujie.liu@intel.com>
Date: Wed, 21 Sep 2022 15:49:21 +0800
From: kernel test robot <yujie.liu@...el.com>
To: "Joel Fernandes (Google)" <joel@...lfernandes.org>
CC: <lkp@...ts.01.org>, <lkp@...el.com>, <rcu@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <urezki@...il.com>,
<neeraj.iitr10@...il.com>, <frederic@...nel.org>,
<paulmck@...nel.org>, <rostedt@...dmis.org>,
"Joel Fernandes (Google)" <joel@...lfernandes.org>
Subject: [rcu/nocb] 79b696b5c3:
WARNING:at_kernel/rcu/tree_nocb.h:#rcu_barrier_entrain
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 79b696b5c31c8729415f065a03f806031377a036 ("[RFC] rcu/nocb: Fix possible bugs in rcu_barrier()")
url: https://github.com/intel-lab-lkp/linux/commits/Joel-Fernandes-Google/rcu-nocb-Fix-possible-bugs-in-rcu_barrier/20220919-061429
base: https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev
patch link: https://lore.kernel.org/rcu/20220918221231.79143-1-joel@joelfernandes.org
in testcase: boot
on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
[ 36.665659][ T1] ------------[ cut here ]------------
[ 36.666591][ T1] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree_nocb.h:1570 rcu_barrier_entrain+0x82/0xa8
[ 36.668410][ T1] Modules linked in:
[ 36.672563][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc1-00134-g79b696b5c31c #1 f5b9e13ee9995ca41e807f76606276f1115eac0d
[ 36.674561][ T1] EIP: rcu_barrier_entrain+0x82/0xa8
[ 36.675625][ T1] Code: 5c c7 87 b8 00 00 00 6b 0d 0b 41 e8 e8 5b 00 00 a1 40 b5 89 43 89 f2 8d 47 5c e8 8a 5c 00 00 84 c0 74 0b f0 ff 05 f4 56 bf 43 <0f> 0b eb 13 f0 ff 05 f4 56 bf 43 89 f0 e8 e4 fe ff ff a1 f4 56 bf
All code
========
0: 5c pop %rsp
1: c7 87 b8 00 00 00 6b movl $0x410b0d6b,0xb8(%rdi)
8: 0d 0b 41
b: e8 e8 5b 00 00 callq 0x5bf8
10: a1 40 b5 89 43 89 f2 movabs 0x478df2894389b540,%eax
17: 8d 47
19: 5c pop %rsp
1a: e8 8a 5c 00 00 callq 0x5ca9
1f: 84 c0 test %al,%al
21: 74 0b je 0x2e
23: f0 ff 05 f4 56 bf 43 lock incl 0x43bf56f4(%rip) # 0x43bf571e
2a:* 0f 0b ud2 <-- trapping instruction
2c: eb 13 jmp 0x41
2e: f0 ff 05 f4 56 bf 43 lock incl 0x43bf56f4(%rip) # 0x43bf5729
35: 89 f0 mov %esi,%eax
37: e8 e4 fe ff ff callq 0xffffffffffffff20
3c: a1 .byte 0xa1
3d: f4 hlt
3e: 56 push %rsi
3f: bf .byte 0xbf
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: eb 13 jmp 0x17
4: f0 ff 05 f4 56 bf 43 lock incl 0x43bf56f4(%rip) # 0x43bf56ff
b: 89 f0 mov %esi,%eax
d: e8 e4 fe ff ff callq 0xfffffffffffffef6
12: a1 .byte 0xa1
13: f4 hlt
14: 56 push %rsi
15: bf .byte 0xbf
[ 36.678492][ T1] EAX: 46021101 EBX: 00000001 ECX: 00000000 EDX: 00000000
[ 36.679585][ T1] ESI: eca91ff4 EDI: eca91f40 EBP: 40847f00 ESP: 40847ef4
[ 36.680728][ T1] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010006
[ 36.681932][ T1] CR0: 80050033 CR2: ff9ff000 CR3: 04208000 CR4: 00040690
[ 36.683037][ T1] Call Trace:
[ 36.683451][ T1] ? rcu_barrier_handler (tree.c:?)
[ 36.684262][ T1] ? rcu_barrier_entrain+0xa8/0xa8
[ 36.685262][ T1] ? generic_exec_single (smp.c:?)
[ 36.686100][ T1] ? smp_call_function_single (??:?)
[ 36.687136][ T1] ? rcu_barrier_entrain+0xa8/0xa8
[ 36.688124][ T1] ? rcu_barrier_entrain+0xa8/0xa8
[ 36.689128][ T1] ? lockdep_hardirqs_on_prepare (lockdep.c:?)
[ 36.689990][ T1] ? trace_hardirqs_on (??:?)
[ 36.690794][ T1] ? rcu_barrier (??:?)
[ 36.691662][ T1] ? rcu_barrier (??:?)
[ 36.692398][ T1] ? rest_init (main.c:?)
[ 36.693144][ T1] ? kernel_init (main.c:?)
[ 36.693700][ T1] ? ret_from_fork (??:?)
[ 36.694311][ T1] irq event stamp: 1063192
[ 36.694951][ T1] hardirqs last enabled at (1063191): _raw_spin_unlock_irqrestore (??:?)
[ 36.696452][ T1] hardirqs last disabled at (1063192): generic_exec_single (smp.c:?)
[ 36.698020][ T1] softirqs last enabled at (1052092): __do_softirq (??:?)
[ 36.699459][ T1] softirqs last disabled at (1051913): do_softirq_own_stack (??:?)
[ 36.700959][ T1] ---[ end trace 0000000000000000 ]---
[ 36.737332][ T1] Write protecting kernel text and read-only data: 41556k
[ 36.767108][ T1] Run /init as init process
[ 36.767902][ T1] with arguments:
[ 36.768500][ T1] /init
[ 36.769014][ T1] with environment:
[ 36.769603][ T1] HOME=/
[ 36.770115][ T1] TERM=linux
[ 36.770690][ T1] RESULT_ROOT=/result/boot/1/vm-snb-i386/openwrt-i386-generic-20190428.cgz/i386-randconfig-a015-20220919/gcc-11/79b696b5c31c8729415f065a03f806031377a036/3
[ 36.773157][ T1] BOOT_IMAGE=/pkg/linux/i386-randconfig-a015-20220919/gcc-11/79b696b5c31c8729415f065a03f806031377a036/vmlinuz-6.0.0-rc1-00134-g79b696b5c31c
[ 36.775405][ T1] branch=linux-review/Joel-Fernandes-Google/rcu-nocb-Fix-possible-bugs-in-rcu_barrier/20220919-061429
[ 36.777284][ T1] job=/lkp/jobs/scheduled/vm-meta-24/boot-1-openwrt-i386-generic-20190428.cgz-79b696b5c31c8729415f065a03f806031377a036-20220920-43941-5brzx0-3.yaml
[ 36.779634][ T1] user=lkp
[ 36.780172][ T1] ARCH=i386
[ 36.780736][ T1] kconfig=i386-randconfig-a015-20220919
[ 36.781730][ T1] commit=79b696b5c31c8729415f065a03f806031377a036
[ 36.782780][ T1] max_uptime=600
[ 36.783407][ T1] LKP_SERVER=internal-lkp-server
[ 36.784202][ T1] selinux=0
[ 36.784713][ T1] softlockup_panic=1
[ 36.785424][ T1] nmi_watchdog=panic
[ 36.786093][ T1] prompt_ramdisk=0
[ 36.786969][ T1] vga=normal
[ 36.848294][ T1] init: Console is alive
[ 36.857169][ T218] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 36.859638][ T218] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 36.861425][ T218] kmodloader (218) used greatest stack depth: 6456 bytes left
[ 36.871627][ T1] init: - preinit -
[ 36.914550][ T223] cat (223) used greatest stack depth: 6384 bytes left
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[ 39.989086][ T243] mount_root: mounting /dev/root
[ 40.005076][ T220] urandom-seed: Seed file not found (/etc/urandom.seed)
[ 40.010546][ T220] sh (220) used greatest stack depth: 6244 bytes left
[ 40.015695][ T1] procd: - early -
[ 40.139445][ T247] udevtrigger (247) used greatest stack depth: 6180 bytes left
[ 40.643117][ T1] procd: - ubus -
[ 45.766969][ C0] random: crng init done
[ 45.774093][ T1] procd: - init -
Please press Enter to activate this console.
[ 45.856832][ T268] kmodloader: loading kernel modules from /etc/modules.d/*
[ 45.860342][ T268] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 47.791780][ T466] fw3 (466) used greatest stack depth: 6080 bytes left
LKP: ttyS0: 746: Kernel tests: Boot OK!
LKP: ttyS0: 746: HOSTNAME vm-snb-i386, MAC 52:54:00:12:34:56, kernel 6.0.0-rc1-00134-g79b696b5c31c 1
LKP: ttyS0: 746: /lkp/lkp/src/bin/run-lkp /lkp/jobs/scheduled/vm-meta-24/boot-1-openwrt-i386-generic-20190428.cgz-79b696b5c31c8729415f065a03f806031377a036-20220920-43941-5brzx0-3.yaml
[ 50.752708][ T759] mkdir: can't create directory '/sys/kernel/debug': Operation not permitted
[ 50.752708][ T759] mount: mounting debug on /sys/kernel/debug failed: No such file or directory
[ 52.897596][ T891] process 891 (wait) attempted a POSIX timer syscall while CONFIG_POSIX_TIMERS is not set
LKP: ttyS0: 746: LKP: rebooting forcely
[ 76.720983][ T746] sysrq: Emergency Sync
[ 76.722077][ T12] Emergency Sync complete
[ 76.722841][ T746] sysrq: Resetting
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/r/202209211556.e602187-yujie.liu@intel.com
To reproduce:
# build kernel
cd linux
cp config-6.0.0-rc1-00134-g79b696b5c31c .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 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.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-6.0.0-rc1-00134-g79b696b5c31c" of type "text/plain" (171945 bytes)
View attachment "job-script" of type "text/plain" (5045 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (19460 bytes)
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