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Message-ID: <20190506003813.GO29809@shao2-debian>
Date: Mon, 6 May 2019 08:38:13 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: "Paul E. McKenney" <paulmck@...ux.ibm.com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
LKML <linux-kernel@...r.kernel.org>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, lkp@...org
Subject: [rcutorture] ba26c41d98:
WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_writer[rcutorture]
FYI, we noticed the following commit (built with gcc-7):
commit: ba26c41d985d7c66c6198e0e22cd287434d83a3e ("rcutorture: Fix stutter_wait() return value and freelist checks")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2019.04.28a
in testcase: rcutorture
with following parameters:
runtime: 300s
test: default
torture_type: srcu
test-description: rcutorture is rcutorture kernel module load/unload test.
test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+--------------------------------------------------------------------+------------+------------+
| | fe661764bc | ba26c41d98 |
+--------------------------------------------------------------------+------------+------------+
| boot_successes | 314 | 278 |
| boot_failures | 18 | 38 |
| BUG:kernel_reboot-without-warning_in_test_stage | 5 | 12 |
| WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 13 | 12 |
| RIP:dev_watchdog | 13 | 12 |
| RIP:ring_buffer_lock_reserve | 1 | |
| WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_writer[rcutorture] | 0 | 14 |
| RIP:rcu_torture_writer[rcutorture] | 0 | 14 |
| calltrace:irq_exit | 0 | 8 |
| calltrace:rcu_torture_free | 0 | 1 |
| RIP:__rb_reserve_next | 0 | 1 |
| RIP:lock_release | 0 | 1 |
+--------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 348.855994] WARNING: CPU: 1 PID: 605 at kernel/rcu/rcutorture.c:1019 rcu_torture_writer+0x5e5/0x820 [rcutorture]
[ 348.858990] Modules linked in: rcutorture(-) torture ppdev parport_pc crct10dif_pclmul crc32c_intel parport rtc_cmos qemu_fw_cfg
[ 348.862052] CPU: 1 PID: 605 Comm: rcu_torture_wri Not tainted 5.1.0-rc1-00106-gba26c41 #1
[ 348.864209] RIP: 0010:rcu_torture_writer+0x5e5/0x820 [rcutorture]
[ 348.866629] Code: 08 a0 49 8b 06 49 39 c6 75 22 48 8b 55 00 49 8d 46 e8 48 39 c2 74 15 41 8b 56 f8 4c 89 ee 48 c7 c7 d1 83 05 a0 e8 cb 11 0c e1 <0f> 0b 49 83 c6 30 4c 39 f3 75 cd e8 9b 68 ff ff 84 c0 0f 84 97 fc
[ 348.871198] RSP: 0018:ffff8881185c3eb8 EFLAGS: 00010296
[ 348.872442] RAX: 0000000000000027 RBX: ffffffffa0085f78 RCX: 0000000000000006
[ 348.874957] RDX: 0000000000000007 RSI: 0000000000000006 RDI: ffff88813bbd1880
[ 348.876675] RBP: ffffffffa0085f68 R08: 0000005dd95e1368 R09: 0000000000000000
[ 348.878449] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa005a670
[ 348.880333] R13: ffffffffa0058800 R14: ffffffffa0084dd8 R15: ffffffffa0085750
[ 348.882924] FS: 0000000000000000(0000) GS:ffff88813ba00000(0000) knlGS:0000000000000000
[ 348.885859] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 348.887797] CR2: 00007f89476dc030 CR3: 000000011d91e000 CR4: 00000000000406a0
[ 348.889811] Call Trace:
[ 348.890529] ? rcu_torture_pipe_update+0x100/0x100 [rcutorture]
[ 348.892393] kthread+0x11c/0x130
[ 348.893012] ? kthread_stop+0x210/0x210
[ 348.893792] ret_from_fork+0x24/0x30
[ 348.894627] irq event stamp: 570574
[ 348.895346] hardirqs last enabled at (570573): [<ffffffff8117d893>] console_unlock+0x533/0x5c0
[ 348.897770] hardirqs last disabled at (570574): [<ffffffff81003417>] trace_hardirqs_off_thunk+0x1a/0x1c
[ 348.900200] softirqs last enabled at (570562): [<ffffffff81c00414>] __do_softirq+0x414/0x450
[ 348.902187] softirqs last disabled at (570549): [<ffffffff8111d557>] irq_exit+0x67/0xd0
[ 348.904076] ---[ end trace 497e668e1ed2342a ]---
To reproduce:
# build kernel
cd linux
cp config-5.1.0-rc1-00106-gba26c41 .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.1.0-rc1-00106-gba26c41" of type "text/plain" (112531 bytes)
View attachment "job-script" of type "text/plain" (4867 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (14360 bytes)
View attachment "rcutorture" of type "text/plain" (6502 bytes)
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