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Date: Sun, 13 Nov 2022 21:48:46 +0800
From: kernel test robot <oliver.sang@...el.com>
To: "Jason A. Donenfeld" <Jason@...c4.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
Dominik Brodowski <linux@...inikbrodowski.net>,
<linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
"Jason A. Donenfeld" <Jason@...c4.com>
Subject: Re: [PATCH v3] hw_random: use add_hwgenerator_randomness() for early
entropy
Greeting,
FYI, we noticed WARNING:at_kernel/kthread.c:#kthread_should_stop due to commit (built with gcc-11):
commit: cea83a6b31856293ceab2c6ebab7843322fe105e ("[PATCH v3] hw_random: use add_hwgenerator_randomness() for early entropy")
url: https://github.com/intel-lab-lkp/linux/commits/UPDATE-20221106-230344/Jason-A-Donenfeld/hw_random-use-add_hwgenerator_randomness-for-early-entropy/20221106-044656
base: https://git.kernel.org/cgit/linux/kernel/git/gregkh/char-misc.git 30a0b95b1335e12efef89dd78518ed3e4a71a763
patch subject: [PATCH v3] hw_random: use add_hwgenerator_randomness() for early entropy
in testcase: stress-ng
version: stress-ng-x86_64-0.11-06_20221109
with following parameters:
nr_threads: 100%
testtime: 60s
class: cpu
test: str
cpufreq_governor: performance
on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz (Cascade Lake) with 512G memory
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202211132159.cd70b1c0-oliver.sang@intel.com
[ 23.856915][ T1] ------------[ cut here ]------------
[ 23.862386][ T1] WARNING: CPU: 48 PID: 1 at kernel/kthread.c:75 kthread_should_stop (kernel/kthread.c:75 kernel/kthread.c:157)
[ 23.871363][ T1] Modules linked in:
[ 23.875261][ T1] CPU: 48 PID: 1 Comm: swapper/0 Not tainted 6.1.0-rc3-00001-gcea83a6b3185 #1
[ 23.884138][ T1] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019
[ 23.895447][ T1] RIP: 0010:kthread_should_stop (kernel/kthread.c:75 kernel/kthread.c:157)
[ 23.901164][ T1] Code: 00 0f 1f 44 00 00 65 48 8b 04 25 00 ad 01 00 f6 40 2e 20 74 15 48 8b 80 08 0a 00 00 48 8b 00 48 d1 e8 83 e0 01 c3 cc cc cc cc <0f> 0b eb e7 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 84 00 00 00 00
All code
========
0: 00 0f add %cl,(%rdi)
2: 1f (bad)
3: 44 00 00 add %r8b,(%rax)
6: 65 48 8b 04 25 00 ad mov %gs:0x1ad00,%rax
d: 01 00
f: f6 40 2e 20 testb $0x20,0x2e(%rax)
13: 74 15 je 0x2a
15: 48 8b 80 08 0a 00 00 mov 0xa08(%rax),%rax
1c: 48 8b 00 mov (%rax),%rax
1f: 48 d1 e8 shr %rax
22: 83 e0 01 and $0x1,%eax
25: c3 retq
26: cc int3
27: cc int3
28: cc int3
29: cc int3
2a:* 0f 0b ud2 <-- trapping instruction
2c: eb e7 jmp 0x15
2e: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
35: 00 00 00 00
39: 0f .byte 0xf
3a: 1f (bad)
3b: 84 00 test %al,(%rax)
3d: 00 00 add %al,(%rax)
...
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: eb e7 jmp 0xffffffffffffffeb
4: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
b: 00 00 00 00
f: 0f .byte 0xf
10: 1f (bad)
11: 84 00 test %al,(%rax)
13: 00 00 add %al,(%rax)
...
[ 23.920849][ T1] RSP: 0000:ffffc90000073b20 EFLAGS: 00010246
[ 23.926910][ T1] RAX: ffff888100df0000 RBX: 0000000000000000 RCX: 0000000000000000
[ 23.934914][ T1] RDX: 000000000000000e RSI: 0000000000000296 RDI: ffffffff830d57b8
[ 23.942914][ T1] RBP: 0000000000000296 R08: 00000000c7b95e77 R09: 00000000294e6f92
[ 23.950912][ T1] R10: 000000000defdd81 R11: 00000000f09cfad9 R12: ffff88c0882c1700
[ 23.958911][ T1] R13: 0000000000000020 R14: 0000000000000000 R15: 00000000001b15d1
[ 23.966910][ T1] FS: 0000000000000000(0000) GS:ffff88bf7fc00000(0000) knlGS:0000000000000000
[ 23.975872][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 23.982459][ T1] CR2: 0000000000000000 CR3: 000000807ee0a001 CR4: 00000000007706e0
[ 23.990463][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 23.998463][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 24.006470][ T1] PKRU: 55555554
[ 24.010006][ T1] Call Trace:
[ 24.013282][ T1] <TASK>
[ 24.016220][ T1] add_hwgenerator_randomness (drivers/char/random.c:885)
[ 24.021853][ T1] hwrng_register (drivers/char/hw_random/core.c:590)
[ 24.026528][ T1] tpm_chip_register (drivers/char/tpm/tpm-chip.c:254)
[ 24.031981][ T1] tpm_tis_core_init.cold (drivers/char/tpm/tpm_tis_core.c:1107)
[ 24.037355][ T1] tpm_tis_plat_probe (drivers/char/tpm/tpm_tis.c:324)
[ 24.042294][ T1] platform_probe (drivers/base/platform.c:1400)
[ 24.046797][ T1] really_probe (drivers/base/dd.c:560 drivers/base/dd.c:639)
[ 24.051207][ T1] ? pm_runtime_barrier (arch/x86/include/asm/paravirt.h:596 arch/x86/include/asm/qspinlock.h:57 include/linux/spinlock.h:203 include/linux/spinlock_api_smp.h:158 include/linux/spinlock.h:400 drivers/base/power/runtime.c:1413)
[ 24.056227][ T1] __driver_probe_device (drivers/base/dd.c:719 drivers/base/dd.c:776)
[ 24.061416][ T1] driver_probe_device (drivers/base/dd.c:808)
[ 24.066347][ T1] __driver_attach (drivers/base/dd.c:1191)
[ 24.071020][ T1] ? __device_attach_driver (drivers/base/dd.c:1135)
[ 24.076558][ T1] ? __device_attach_driver (drivers/base/dd.c:1135)
[ 24.082097][ T1] bus_for_each_dev (drivers/base/bus.c:301)
[ 24.086774][ T1] bus_add_driver (drivers/base/bus.c:618)
[ 24.091443][ T1] driver_register (drivers/base/driver.c:246)
[ 24.096116][ T1] ? tpm_init (drivers/char/tpm/tpm_tis.c:379)
[ 24.100263][ T1] init_tis (drivers/char/tpm/tpm_tis.c:386)
[ 24.104250][ T1] ? tpm_init (drivers/char/tpm/tpm_tis.c:379)
[ 24.108399][ T1] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 3) kernel/time/timekeeping.c:289 (discriminator 3) kernel/time/timekeeping.c:388 (discriminator 3) kernel/time/timekeeping.c:848 (discriminator 3))
[ 24.112637][ T1] ? tpm_init (drivers/char/tpm/tpm_tis.c:379)
[ 24.116789][ T1] do_one_initcall (init/main.c:1303)
[ 24.121461][ T1] do_initcalls (init/main.c:1375 init/main.c:1392)
[ 24.125784][ T1] kernel_init_freeable (init/main.c:1635)
[ 24.130978][ T1] ? rest_init (init/main.c:1511)
[ 24.135386][ T1] kernel_init (init/main.c:1521)
[ 24.139711][ T1] ret_from_fork (arch/x86/entry/entry_64.S:306)
[ 24.144122][ T1] </TASK>
[ 24.147143][ T1] ---[ end trace 0000000000000000 ]---
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.
--
0-DAY CI Kernel Test Service
https://01.org/lkp
View attachment "config-6.1.0-rc3-00001-gcea83a6b3185" of type "text/plain" (166032 bytes)
View attachment "job-script" of type "text/plain" (8429 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (32868 bytes)
View attachment "job.yaml" of type "text/plain" (5278 bytes)
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