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Message-ID: <YuqOqJnNzmEDKRIB@xsang-OptiPlex-9020>
Date: Wed, 3 Aug 2022 23:05:12 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
CC: Neeraj Upadhyay <neeraj.iitr10@...il.com>,
LKML <linux-kernel@...r.kernel.org>, <lkp@...ts.01.org>,
<lkp@...el.com>
Subject: [rcutorture] 613b00fbe6:
WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_fwd_prog_cr[rcutorture]
(please be noted we reported this since clean on parent, ~10% on this commit,
and found similar issue on latest maineline, e.g. v5.19)
Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: 613b00fbe64461f1c73e035e07c22cf3de65740b ("rcutorture: Add ability to limit callback-flood intensity")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: rcutorture
version:
with following parameters:
runtime: 300s
test: default
torture_type: tasks-tracing
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 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------------------------+------------+------------+
| | 82e310033d | 613b00fbe6 |
+-------------------------------------------------------------------------+------------+------------+
| WARNING:suspicious_RCU_usage | 495 | 492 |
| net/mac80211/util.c:#RCU-list_traversed_in_non-reader_section | 495 | 492 |
| WARNING:at_kernel/rcu/rcutorture.c:#rcu_torture_fwd_prog_cr[rcutorture] | 0 | 59 |
| RIP:rcu_torture_fwd_prog_cr[rcutorture] | 0 | 59 |
+-------------------------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 108.264694][ T609] ------------[ cut here ]------------
[ 108.266289][ T609] WARNING: CPU: 1 PID: 609 at kernel/rcu/rcutorture.c:2424 rcu_torture_fwd_prog_cr+0x2b4/0x35b [rcutorture]
[ 108.269234][ T609] Modules linked in: rcutorture torture
[ 108.273815][ T609] CPU: 1 PID: 609 Comm: rcu_torture_fwd Not tainted 5.16.0-rc1-00017-g613b00fbe644 #1
[ 108.278939][ T609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 108.284076][ T609] RIP: 0010:rcu_torture_fwd_prog_cr+0x2b4/0x35b [rcutorture]
[ 108.287642][ T609] Code: 00 00 00 31 f6 48 83 fb 63 48 c7 c7 8c cf 3d c0 40 0f 9e c6 31 c9 31 d2 89 34 24 e8 d2 82 65 e1 48 83 fb 63 8b 34 24 7f 04 90 <0f> 0b 90 31 c9 31 d2 48 c7 c7 5c cf 3d c0 e8 b5 82 65 e1 48 8b 0d
[ 108.292474][ T609] RSP: 0018:ffffbaa900e57e88 EFLAGS: 00010293
[ 108.296403][ T609] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 108.300220][ T609] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
[ 108.304399][ T609] RBP: ffff8eb8aabf9000 R08: 0000000000000000 R09: 0000000000000000
[ 108.308498][ T609] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000c350
[ 108.312397][ T609] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 108.316445][ T609] FS: 0000000000000000(0000) GS:ffff8ebbafd00000(0000) knlGS:0000000000000000
[ 108.318874][ T609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 108.322154][ T609] CR2: 00007f252d395000 CR3: 0000000129f7d000 CR4: 00000000000406e0
[ 108.326356][ T609] Call Trace:
[ 108.327617][ T609] <TASK>
[ 108.329212][ T609] rcu_torture_fwd_prog.cold+0x15/0x107 [rcutorture]
[ 108.331042][ T609] ? rcu_torture_fwd_cb_hist+0x130/0x130 [rcutorture]
[ 108.334311][ T609] kthread+0x174/0x190
[ 108.337288][ T609] ? set_kthread_struct+0x70/0x70
[ 108.338564][ T609] ret_from_fork+0x1f/0x30
[ 108.344134][ T609] </TASK>
[ 108.345054][ T609] irq event stamp: 627031
[ 108.347350][ T609] hardirqs last enabled at (627041): [<ffffffffa1972173>] __up_console_sem+0x93/0xa0
[ 108.351383][ T609] hardirqs last disabled at (627052): [<ffffffffa1972158>] __up_console_sem+0x78/0xa0
[ 108.356154][ T609] softirqs last enabled at (627068): [<ffffffffa3600418>] __do_softirq+0x418/0x6d2
[ 108.360637][ T609] softirqs last disabled at (627061): [<ffffffffa18e79af>] irq_exit_rcu+0x7f/0xa0
[ 108.363278][ T609] ---[ end trace e4e644c3e2ccc2ed ]---
To reproduce:
# build kernel
cd linux
cp config-5.16.0-rc1-00017-g613b00fbe644 .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-5.16.0-rc1-00017-g613b00fbe644" of type "text/plain" (149281 bytes)
View attachment "job-script" of type "text/plain" (5298 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (21748 bytes)
View attachment "rcutorture" of type "text/plain" (10104 bytes)
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