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 ]---
Hi,
On Wed, Nov 15, 2023 at 01:28:13PM +0000, Richard Fitzgerald wrote:
> 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 ]---
It's not entirely clear to me what could be happening here, but it looks
similar to the issue that Marco was fixing here:
https://lore.kernel.org/linux-kselftest/[email protected]/
Could you test with that fix and see if it still happens?
Thanks!
Maxime
On 28/11/23 14:42, Maxime Ripard wrote:
> Hi,
>
> On Wed, Nov 15, 2023 at 01:28:13PM +0000, Richard Fitzgerald wrote:
>> 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 ]---
>
> It's not entirely clear to me what could be happening here, but it looks
> similar to the issue that Marco was fixing here:
> https://lore.kernel.org/linux-kselftest/[email protected]/
>
> Could you test with that fix and see if it still happens?
>
> Thanks!
> Maxime
Yes, Marco's patch fixes it.
On Fri, Dec 01, 2023 at 03:35:26PM +0000, Richard Fitzgerald wrote:
> On 28/11/23 14:42, Maxime Ripard wrote:
> > Hi,
> >
> > On Wed, Nov 15, 2023 at 01:28:13PM +0000, Richard Fitzgerald wrote:
> > > 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 ]---
> >
> > It's not entirely clear to me what could be happening here, but it looks
> > similar to the issue that Marco was fixing here:
> > https://lore.kernel.org/linux-kselftest/[email protected]/
> >
> > Could you test with that fix and see if it still happens?
> >
> > Thanks!
> > Maxime
>
> Yes, Marco's patch fixes it.
Awesome, thanks for the report and for testing :)
Maxime