From: kernel test robot <oliver.sang@intel.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
<linux-serial@vger.kernel.org>, <oliver.sang@intel.com>
Subject: [rt-devel:linux-7.0.y-rt-rebase] 55eabced1d: BUG:kernel_reboot-without-warning_in_test_stage
Date: Fri, 27 Feb 2026 15:57:19 +0800 [thread overview]
Message-ID: <202602271552.c972ef9e-lkp@intel.com> (raw)
Hello,
patch "serial: 8250: Switch to nbcon console" was reverted by
f79b163c42314 Revert "serial: 8250: Switch to nbcon console"
based on our previous old report
"[linux-next:master] [serial] b63e6f60ea: BUG:soft_lockup-CPU##stuck_for#s![modprobe:#]"
in
https://lore.kernel.org/all/202501221029.fb0d574d-lkp@intel.com/
there are some discussions which seems think the commit is not the real root
cause of the issue.
this commit 55eabced1d reapplies "serial: 8250: Switch to nbcon console", then
we notice a new "kernel_reboot-without-warning_in_test_stage" issue in a boot
test with randconfig. however, unfortunately, we cannot capture further useful
information in dmesg.
so maybe this report cannot supply enough useful information, just FYI what
we observed in our tests.
below is full report.
kernel test robot noticed "BUG:kernel_reboot-without-warning_in_test_stage" on:
commit: 55eabced1d566d2815cc215272ece998c8f2e93f ("Reapply "serial: 8250: Switch to nbcon console"")
https://git.kernel.org/cgit/linux/kernel/git/rt/linux-rt-devel.git linux-7.0.y-rt-rebase
in testcase: boot
config: x86_64-randconfig-001-20260225
compiler: gcc-13
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-------------------------------------------------+----------+------------+
| | v7.0-rc1 | 55eabced1d |
+-------------------------------------------------+----------+------------+
| boot_successes | 40 | 0 |
| boot_failures | 0 | 6 |
| BUG:kernel_reboot-without-warning_in_test_stage | 0 | 6 |
+-------------------------------------------------+----------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202602271552.c972ef9e-lkp@intel.com
[ 16.023891][ T126] sleep started
[ 16.023940][ T126]
[ 17.102254][ T126] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-288/boot-1-quantal-x86_64-core-20190426.cgz-x86_64-randconfig-001-20260225-55eabced1d56-20260226-27605-1wm64jc-2.yaml&job_state=post_run -O /dev/null
[ 17.106752][ T126]
mkdir: cannot create directory `/var/lock/lkp-bootstrap.lock': File exists
[ 19.145988][ T126] kill 428 vmstat -n 1
[ 19.146032][ T126]
[ 19.189830][ T126] kill 419 cat /proc/kmsg
[ 19.189873][ T126]
[ 19.253688][ T126] kill 447 /bin/sh /lkp/lkp/src/programs/watchdog/monitor
[ 19.258684][ T126]
[ 19.277825][ T126] wait for background processes: 439
[ 19.277867][ T126]
[ 19.279442][ T126] monitor
[ 19.279463][ T126]
[ 24.067178][ T126] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-288/boot-1-quantal-x86_64-core-20190426.cgz-x86_64-randconfig-001-20260225-55eabced1d56-20260226-27605-1wm64jc-2.yaml&loadavg=0.94%200.22%200.07%201/102%20625&start_time=1772044359&end_time=1772044361&version=/lkp/lkp/.src-20260226-000921:3d999d51ba0e-dirty:bc8736f22ca0& -O /dev/null
[ 24.067231][ T126]
[ 25.032907][ T126] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/vm-meta-288/boot-1-quantal-x86_64-core-20190426.cgz-x86_64-randconfig-001-20260225-55eabced1d56-20260226-27605-1wm64jc-2.yaml&job_state=finished -O /dev/null
[ 25.035121][ T126]
[ 25.272417][ T1] init: tty4 main process (515) terminated with status 1
[ 25.273235][ T1] init: tty4 main process ended, respawning
[ 25.304364][ T1] init: tty5 main process (518) terminated with status 1
[ 25.305147][ T1] init: tty5 main process ended, respawning
[ 25.320550][ T1] init: tty2 main process (519) terminated with status 1
[ 25.321322][ T1] init: tty2 main process ended, respawning
[ 25.340485][ T1] init: tty3 main process (522) terminated with status 1
[ 25.341245][ T1] init: tty3 main process ended, respawning
[ 25.368534][ T1] init: tty6 main process (523) terminated with status 1
[ 25.369377][ T1] init: tty6 main process ended, respawning
LKP: ttyS0: 103: LKP: tbox cant kexec and rebooting forcely
[ 26.117689][ T126] LKP: stdout: 103: LKP: tbox cant kexec and rebooting forcely
[ 26.117719][ T126]
[ 26.234198][ T126] /usr/bin/wget -q --timeout=3600 --tries=1 --local-encoding=UTF-8 http://internal-lkp-server:80/~lkp/cgi-bin/lkp-wtmp?tbox_name=vm-snb&tbox_state=rebooting_cant_kexec&job_file=/lkp/jobs/scheduled/vm-meta-288/boot-1-quantal-x86_64-core-20190426.cgz-x86_64-randconfig-001-20260225-55eabced1d56-20260226-27605-1wm64jc-2.yaml -O /dev/null
[ 26.238678][ T126]
BUG: kernel reboot-without-warning in test stage
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260227/202602271552.c972ef9e-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-02-27 7:58 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202602271552.c972ef9e-lkp@intel.com \
--to=oliver.sang@intel.com \
--cc=bigeasy@linutronix.de \
--cc=linux-serial@vger.kernel.org \
--cc=lkp@intel.com \
--cc=oe-lkp@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox