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Message-ID: <e239b94b-462a-41e5-9a4c-cd1ffd530d75@opensource.cirrus.com>
Date: Wed, 15 Nov 2023 13:28:13 +0000
From: Richard Fitzgerald <rf@...nsource.cirrus.com>
To: Greg KH <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>, <mripard@...nel.org>
CC: <linux-kernel@...r.kernel.org>, - <patches@...nsource.cirrus.com>
Subject: platform-device-test on 6.6 causes "(null)' : is not initialized, yet
kobject_get() is being called"
Target platform: Aaeon Whiskeylake UpXtreme (Celeron CPU)
Target OS: Debian 11 (non-graphical install)
Kernel: v6.6.1 from
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
branch: linux-6.6.y
at commit 8afabe2118a9 ("Linux 6.6.1")
defconfig attached.
CONFIG_DM_KUNIT_TEST=m
gcc (Debian 10.2.1-6) 10.2.1 20210110
loading the module to run the test causes kobject_get() to WARN:
sudo modprobe platform-device-test
[ 82.595238] KTAP version 1
[ 82.595252] 1..1
[ 82.595487] KTAP version 1
[ 82.595489] # Subtest: platform-device-devm
[ 82.595490] # module: platform_device_test
[ 82.595493] 1..4
[ 82.596130] ok 1 platform_device_devm_register_unregister_test
[ 82.596314] ok 2
platform_device_devm_register_get_unregister_with_devm_test
[ 82.596387] ------------[ cut here ]------------
[ 82.596395] kobject: '(null)' (0000000067030afc): is not initialized,
yet kobject_get() is being called.
[ 82.596410] WARNING: CPU: 1 PID: 654 at lib/kobject.c:637
kobject_get+0x4c/0x70
[ 82.596415] Modules linked in: platform_device_test(E+)
x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) crc32_pclmul(E)
ghash_clmulni_intel(E) sha512_ssse3(E) sha512_generic(E) nls_ascii(E)
nls_cp437(E) vfat(E) fat(E) aesni_intel(E) libaes(E) crypto_simd(E)
cryptd(E) mei_wdt(E) mei_hdcp(E) snd_hda_codec_hdmi(E) watchdog(E)
rapl(E) intel_rapl_msr(E) snd_hda_codec_cs8409(E)
snd_hda_codec_generic(E) intel_cstate(E) ledtrig_audio(E)
snd_hda_intel(E) snd_intel_dspcfg(E) intel_uncore(E) snd_hda_codec(E)
processor_thermal_device_pci_legacy(E) processor_thermal_device(E)
snd_hda_core(E) processor_thermal_rfim(E) efi_pstore(E) pcspkr(E)
mei_me(E) wmi_bmof(E) snd_pcm(E) processor_thermal_mbox(E)
processor_thermal_rapl(E) snd_timer(E) intel_rapl_common(E)
int340x_thermal_zone(E) snd(E) intel_soc_dts_iosf(E) mei(E)
intel_pch_thermal(E) soundcore(E) tpm_crb(E) evdev(E) tpm_tis(E)
tpm_tis_core(E) tpm(E) intel_pmc_core(E) acpi_pad(E) rng_core(E)
acpi_tad(E) button(E) msr(E) fuse(E) configfs(E) efivarfs(E) ip_tables(E)
[ 82.596473] x_tables(E) autofs4(E) ext4(E) crc32c_generic(E)
crc16(E) mbcache(E) jbd2(E) spi_pxa2xx_platform(E) dw_dmac(E)
dw_dmac_core(E) mmc_block(E) i915(E) drm_buddy(E) ttm(E) intel_gtt(E)
drm_display_helper(E) drm_kms_helper(E) sdhci_pci(E) xhci_pci(E) drm(E)
crct10dif_pclmul(E) cqhci(E) crct10dif_common(E) intel_lpss_pci(E)
crc32c_intel(E) sdhci(E) intel_lpss(E) xhci_hcd(E) i2c_i801(E) cec(E)
i2c_smbus(E) idma64(E) mmc_core(E) usbcore(E) usb_common(E) fan(E)
video(E) wmi(E)
[ 82.596508] CPU: 1 PID: 654 Comm: kunit_try_catch Tainted: G
E N 6.6.1-test #1
[ 82.596510] Hardware name: AAEON UP-WHL01/UP-WHL01, BIOS UPW1AM19
11/10/2020
[ 82.596512] RIP: 0010:kobject_get+0x4c/0x70
[ 82.596515] Code: 44 24 38 85 c0 74 3b 78 25 83 c0 01 78 20 4c 89 e0
41 5c c3 cc cc cc cc 48 8b 37 48 89 fa 48 c7 c7 80 a6 a1 92 e8 64 2a 68
ff <0f> 0b eb c4 be 01 00 00 00 e8 26 08 af ff 4c 89 e0 41 5c c3 cc cc
[ 82.596517] RSP: 0018:ffffa2cf814e7d40 EFLAGS: 00010286
[ 82.596519] RAX: 0000000000000000 RBX: ffffffffc111c510 RCX:
ffff8e28e3c9c888
[ 82.596521] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI:
ffff8e28e3c9c880
[ 82.596522] RBP: ffff8e27843e48c0 R08: 0000000000000000 R09:
00000000ffffefff
[ 82.596524] R10: ffffa2cf814e7be0 R11: ffffffff92cd2788 R12:
ffffffffc111c510
[ 82.596525] R13: 0000000000000000 R14: 0000000000000000 R15:
ffff8e2784968da0
[ 82.596526] FS: 0000000000000000(0000) GS:ffff8e28e3c80000(0000)
knlGS:0000000000000000
[ 82.596528] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 82.596530] CR2: 0000558fd9288c70 CR3: 000000002b020003 CR4:
00000000003706e0
[ 82.596531] Call Trace:
[ 82.596532] <TASK>
[ 82.596534] ? __warn+0x84/0x170
[ 82.596538] ? kobject_get+0x4c/0x70
[ 82.596541] ? report_bug+0x198/0x1b0
[ 82.596545] ? handle_bug+0x3c/0x70
[ 82.596547] ? exc_invalid_op+0x18/0x70
[ 82.596549] ? asm_exc_invalid_op+0x1a/0x20
[ 82.596554] ? kobject_get+0x4c/0x70
[ 82.596557] kobject_add_internal+0x30/0x2b0
[ 82.596560] kobject_add+0x7e/0xf0
[ 82.596565] kobject_create_and_add+0x51/0x90
[ 82.596567] module_add_driver+0xfe/0x110
[ 82.596571] bus_add_driver+0x130/0x220
[ 82.596575] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[ 82.596578] driver_register+0x60/0x120
[ 82.596581]
probed_platform_device_devm_register_unregister_test+0x40/0x3e0
[platform_device_test]
[ 82.596587] ? platform_device_devm_init+0x74/0xd0 [platform_device_test]
[ 82.596593] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[ 82.596595] kunit_generic_run_threadfn_adapter+0x17/0x30
[ 82.596597] kthread+0xf4/0x130
[ 82.596600] ? __pfx_kthread+0x10/0x10
[ 82.596604] ret_from_fork+0x31/0x50
[ 82.596606] ? __pfx_kthread+0x10/0x10
[ 82.596609] ret_from_fork_asm+0x1b/0x30
[ 82.596615] </TASK>
[ 82.596616] irq event stamp: 975
[ 82.596618] hardirqs last enabled at (981): [<ffffffff9193aa6d>]
console_unlock+0x10d/0x130
[ 82.596621] hardirqs last disabled at (986): [<ffffffff9193aa52>]
console_unlock+0xf2/0x130
[ 82.596624] softirqs last enabled at (0): [<ffffffff9188890f>]
copy_process+0xa8f/0x2080
[ 82.596626] softirqs last disabled at (0): [<0000000000000000>] 0x0
[ 82.596628] ---[ end trace 0000000000000000 ]---
View attachment "defconfig" of type "text/plain" (31159 bytes)
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