Message-ID: <874k1htj8b.fsf@mutex.one>
Date:   Sun, 22 May 2022 23:17:40 +0300
From:   Marian Postevca <posteuca@...ex.one>
To:     Maximilian Senftleben <kernel@...l.msdigital.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: PROBLEM: No static MAC address for usb gadget ethernet via
 kernel parameter any more.

Maximilian Senftleben <kernel@...l.msdigital.de> writes:

> - During debugging and testing we noticed that while 
> "dev_set_mac_address" used to set "addr_assign_type" to NET_ADDR_SET, 
> the mentioned commit directly sets "addr_assign_type" to NET_ADDR_RANDOM 
> and the called "eth_hw_addr_set" does not modify the type afterwards.
> If I change line 874 "net->addr_assign_type = NET_ADDR_RANDOM;" to 
> "net->addr_assign_type = NET_ADDR_SET;" then the issue seems to be solved.

Are you using systemd on the system where this issue is visible?
I managed to reproduce it only on systemd-systems.
It seems that systemd, by default, will try to give a persistent
MAC address to ethernet interfaces that have a random MAC address.

That is why "net->addr_assign_type = NET_ADDR_SET" fixes the issue,
systemd sees that the interface doesn't have a random MAC address and
leaves the one set by the kernel(in your case the one set on the command
line), but if it sees that the interface has a random MAC address it
will change the address from the one supplied on the command line, to
some internal MAC address that systemd generated.

If you are using systemd you can workaround this issue with the
following systemd link file:

[Match]
OriginalName=usb*

[Link]
MACAddressPolicy=none

You can put the file in /etc/systemd/network/90-bridge.link
And then reboot the system.

I will send a patch that fixes this issue completely. But in the
meantime please let me know if the workaround solves the issue for you.
>
> - Regarding bootargs and defconfig, we encountered the issue with our 
> custom board and some own/modified drivers and additional patches, which 
> might make it difficult to reproduce the issue outside of our setup.
>
> bootargs:
> "root=ubi0:userspace0 ubi.mtd=ubi_volumes rootfstype=ubifs 
> consoleblank=0 vt.global_cursor_default=0 console=ttyS0 
> g_ether.dev_addr=46:A2:73:A9:44:56 g_ether.host_addr=46:A2:73:A9:44:55"
>
> defconfig:
>
> CONFIG_KERNEL_XZ=y
> CONFIG_SYSVIPC=y
> CONFIG_NO_HZ=y
> CONFIG_HIGH_RES_TIMERS=y
> CONFIG_PREEMPT_VOLUNTARY=y
> CONFIG_IKCONFIG=y
> CONFIG_IKCONFIG_PROC=y
> CONFIG_LOG_BUF_SHIFT=18
> CONFIG_CGROUPS=y
> CONFIG_RELAY=y
> CONFIG_BOOT_CONFIG=y
> CONFIG_EXPERT=y
> CONFIG_PERF_EVENTS=y
> # CONFIG_SLUB_DEBUG is not set
> # CONFIG_COMPAT_BRK is not set
> CONFIG_ARCH_MULTI_V6=y
> CONFIG_ARCH_MXC=y
> CONFIG_SOC_IMX6Q=y
> # CONFIG_HARDEN_BRANCH_HISTORY is not set
> CONFIG_ARM_ERRATA_814220=y
> CONFIG_SMP=y
> CONFIG_SCHED_MC=y
> CONFIG_HAVE_ARM_ARCH_TIMER=y
> CONFIG_HOTPLUG_CPU=y
> CONFIG_ARM_PSCI=y
> CONFIG_HIGHMEM=y
> CONFIG_ZBOOT_ROM_TEXT=0
> CONFIG_ZBOOT_ROM_BSS=0
> CONFIG_CMDLINE="noinitrd console=ttymxc0,115200"
> CONFIG_CPU_FREQ=y
> CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
> CONFIG_ARM_IMX6Q_CPUFREQ=y
> CONFIG_CPU_IDLE=y
> CONFIG_VFP=y
> CONFIG_NEON=y
> # CONFIG_SUSPEND is not set
> CONFIG_PM=y
> CONFIG_PM_DEBUG=y
> CONFIG_ACMEINC_SPI_CLRC663=y
> # CONFIG_MXC_GPU_VIV is not set
> CONFIG_U_DMA_BUF=y
> CONFIG_MXC_VPU=y
> CONFIG_WILC_SDIO=y
> # CONFIG_SECCOMP is not set
> CONFIG_NET=y
> CONFIG_PACKET=y
> CONFIG_UNIX=y
> CONFIG_INET=y
> CONFIG_IP_PNP=y
> CONFIG_IP_PNP_DHCP=y
> CONFIG_MPTCP=y
> CONFIG_NETFILTER=y
> # CONFIG_NETFILTER_EGRESS is not set
> CONFIG_BRIDGE=y
> CONFIG_CFG80211=y
> # CONFIG_CFG80211_DEFAULT_PS is not set
> CONFIG_CFG80211_DEBUGFS=y
> CONFIG_CFG80211_WEXT=y
> CONFIG_MAC80211=y
> CONFIG_MAC80211_DEBUGFS=y
> CONFIG_RFKILL=y
> CONFIG_RFKILL_INPUT=y
> CONFIG_PCI=y
> CONFIG_UEVENT_HELPER=y
> CONFIG_DEVTMPFS=y
> CONFIG_DEVTMPFS_MOUNT=y
> # CONFIG_STANDALONE is not set
> CONFIG_EXTRA_FIRMWARE="mchp/wilc1000_wifi_firmware.bin 
> imx/sdma/sdma-imx6q.bin vpu_fw_imx6d.bin brcm/brcmfmac43455-sdio.bin 
> brcm/brcmfmac43455-sdio.acmeinc,imx6q-doorvision.txt vpu_fw_imx6q.bin"
> CONFIG_EXTRA_FIRMWARE_DIR="drivers/base/firmware_loader/builtin"
> CONFIG_IMX_WEIM=y
> CONFIG_CONNECTOR=y
> CONFIG_MTD=y
> CONFIG_MTD_CMDLINE_PARTS=y
> CONFIG_MTD_BLOCK=y
> CONFIG_MTD_CFI=y
> CONFIG_MTD_JEDECPROBE=y
> CONFIG_MTD_CFI_INTELEXT=y
> CONFIG_MTD_CFI_AMDSTD=y
> CONFIG_MTD_CFI_STAA=y
> CONFIG_MTD_DATAFLASH=y
> CONFIG_MTD_SST25L=y
> CONFIG_MTD_RAW_NAND=y
> CONFIG_MTD_NAND_GPMI_NAND=y
> CONFIG_MTD_SPI_NOR=y
> CONFIG_MTD_UBI=y
> CONFIG_MTD_UBI_FASTMAP=y
> CONFIG_MTD_UBI_BLOCK=y
> CONFIG_BLK_DEV_LOOP=y
> CONFIG_BLK_DEV_RAM=y
> CONFIG_BLK_DEV_RAM_SIZE=65536
> CONFIG_EEPROM_AT24=y
> CONFIG_EEPROM_AT25=y
> CONFIG_SCSI=y
> # CONFIG_SCSI_PROC_FS is not set
> CONFIG_BLK_DEV_SD=y
> # CONFIG_BLK_DEV_BSG is not set
> CONFIG_SCSI_CONSTANTS=y
> CONFIG_SCSI_LOGGING=y
> CONFIG_SCSI_SCAN_ASYNC=y
> # CONFIG_SCSI_LOWLEVEL is not set
> CONFIG_NETDEVICES=y
> # CONFIG_NET_VENDOR_3COM is not set
> # CONFIG_NET_VENDOR_ADAPTEC is not set
> # CONFIG_NET_VENDOR_AGERE is not set
> # CONFIG_NET_VENDOR_ALACRITECH is not set
> # CONFIG_NET_VENDOR_ALTEON is not set
> # CONFIG_NET_VENDOR_AMAZON is not set
> # CONFIG_NET_VENDOR_AMD is not set
> # CONFIG_NET_VENDOR_AQUANTIA is not set
> # CONFIG_NET_VENDOR_ARC is not set
> # CONFIG_NET_VENDOR_ASIX is not set
> # CONFIG_NET_VENDOR_ATHEROS is not set
> # CONFIG_NET_VENDOR_BROADCOM is not set
> # CONFIG_NET_VENDOR_CADENCE is not set
> # CONFIG_NET_VENDOR_CAVIUM is not set
> # CONFIG_NET_VENDOR_CHELSIO is not set
> # CONFIG_NET_VENDOR_CIRRUS is not set
> # CONFIG_NET_VENDOR_CISCO is not set
> # CONFIG_NET_VENDOR_CORTINA is not set
> # CONFIG_NET_VENDOR_DEC is not set
> # CONFIG_NET_VENDOR_DLINK is not set
> # CONFIG_NET_VENDOR_EMULEX is not set
> # CONFIG_NET_VENDOR_ENGLEDER is not set
> # CONFIG_NET_VENDOR_EZCHIP is not set
> # CONFIG_NET_VENDOR_FARADAY is not set
> # CONFIG_NET_VENDOR_GOOGLE is not set
> # CONFIG_NET_VENDOR_HISILICON is not set
> # CONFIG_NET_VENDOR_HUAWEI is not set
> # CONFIG_NET_VENDOR_INTEL is not set
> # CONFIG_NET_VENDOR_MARVELL is not set
> # CONFIG_NET_VENDOR_MELLANOX is not set
> # CONFIG_NET_VENDOR_MICREL is not set
> # CONFIG_NET_VENDOR_MICROCHIP is not set
> # CONFIG_NET_VENDOR_MICROSEMI is not set
> # CONFIG_NET_VENDOR_MYRI is not set
> # CONFIG_NET_VENDOR_NI is not set
> # CONFIG_NET_VENDOR_NATSEMI is not set
> # CONFIG_NET_VENDOR_NETERION is not set
> # CONFIG_NET_VENDOR_NETRONOME is not set
> # CONFIG_NET_VENDOR_NVIDIA is not set
> # CONFIG_NET_VENDOR_OKI is not set
> # CONFIG_NET_VENDOR_PACKET_ENGINES is not set
> # CONFIG_NET_VENDOR_PENSANDO is not set
> # CONFIG_NET_VENDOR_QLOGIC is not set
> # CONFIG_NET_VENDOR_BROCADE is not set
> # CONFIG_NET_VENDOR_QUALCOMM is not set
> # CONFIG_NET_VENDOR_RDC is not set
> # CONFIG_NET_VENDOR_REALTEK is not set
> # CONFIG_NET_VENDOR_RENESAS is not set
> # CONFIG_NET_VENDOR_ROCKER is not set
> # CONFIG_NET_VENDOR_SAMSUNG is not set
> # CONFIG_NET_VENDOR_SEEQ is not set
> # CONFIG_NET_VENDOR_SILAN is not set
> # CONFIG_NET_VENDOR_SIS is not set
> # CONFIG_NET_VENDOR_SOLARFLARE is not set
> # CONFIG_NET_VENDOR_SMSC is not set
> # CONFIG_NET_VENDOR_SOCIONEXT is not set
> # CONFIG_NET_VENDOR_STMICRO is not set
> # CONFIG_NET_VENDOR_SUN is not set
> # CONFIG_NET_VENDOR_SYNOPSYS is not set
> # CONFIG_NET_VENDOR_TEHUTI is not set
> # CONFIG_NET_VENDOR_TI is not set
> # CONFIG_NET_VENDOR_VERTEXCOM is not set
> # CONFIG_NET_VENDOR_VIA is not set
> # CONFIG_NET_VENDOR_WIZNET is not set
> # CONFIG_NET_VENDOR_XILINX is not set
> CONFIG_DP83867_PHY=y
> CONFIG_USB_USBNET=y
> # CONFIG_WLAN_VENDOR_ADMTEK is not set
> # CONFIG_WLAN_VENDOR_ATH is not set
> # CONFIG_WLAN_VENDOR_ATMEL is not set
> CONFIG_BRCMFMAC=y
> # CONFIG_WLAN_VENDOR_CISCO is not set
> # CONFIG_WLAN_VENDOR_INTEL is not set
> # CONFIG_WLAN_VENDOR_INTERSIL is not set
> # CONFIG_WLAN_VENDOR_MARVELL is not set
> # CONFIG_WLAN_VENDOR_MEDIATEK is not set
> # CONFIG_WLAN_VENDOR_MICROCHIP is not set
> # CONFIG_WLAN_VENDOR_RALINK is not set
> # CONFIG_WLAN_VENDOR_REALTEK is not set
> # CONFIG_WLAN_VENDOR_RSI is not set
> # CONFIG_WLAN_VENDOR_ST is not set
> # CONFIG_WLAN_VENDOR_TI is not set
> # CONFIG_WLAN_VENDOR_ZYDAS is not set
> # CONFIG_WLAN_VENDOR_QUANTENNA is not set
> CONFIG_INPUT_EVDEV=y
> CONFIG_KEYBOARD_GPIO=y
> CONFIG_KEYBOARD_IMX=y
> # CONFIG_MOUSE_PS2 is not set
> CONFIG_INPUT_TOUCHSCREEN=y
> CONFIG_TOUCHSCREEN_EDT_FT5X06=y
> CONFIG_INPUT_MISC=y
> # CONFIG_SERIO_SERPORT is not set
> # CONFIG_LEGACY_PTYS is not set
> CONFIG_SERIAL_IMX=y
> CONFIG_SERIAL_IMX_CONSOLE=y
> # CONFIG_SERIAL_IMX_EARLYCON is not set
> CONFIG_SERIAL_FSL_LPUART=y
> CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
> # CONFIG_I2C_COMPAT is not set
> CONFIG_I2C_CHARDEV=y
> CONFIG_I2C_MUX_GPIO=y
> # CONFIG_I2C_HELPER_AUTO is not set
> CONFIG_I2C_GPIO=y
> CONFIG_I2C_IMX=y
> CONFIG_SPI=y
> CONFIG_SPI_FSL_QUADSPI=y
> CONFIG_SPI_IMX=y
> CONFIG_SPI_SPIDEV=y
> CONFIG_PINCTRL_MICROCHIP_SGPIO=y
> CONFIG_GPIO_SYSFS=y
> CONFIG_GPIO_MXC=y
> CONFIG_GPIO_PCA953X=y
> CONFIG_POWER_RESET=y
> CONFIG_POWER_RESET_SYSCON=y
> CONFIG_POWER_RESET_SYSCON_POWEROFF=y
> CONFIG_POWER_SUPPLY=y
> CONFIG_SENSORS_GPIO_FAN=y
> CONFIG_SENSORS_IIO_HWMON=y
> CONFIG_CPU_THERMAL=y
> CONFIG_IMX_THERMAL=y
> CONFIG_WATCHDOG=y
> CONFIG_RN5T618_WATCHDOG=y
> CONFIG_IMX2_WDT=y
> CONFIG_MFD_RN5T618=y
> CONFIG_REGULATOR=y
> CONFIG_REGULATOR_FIXED_VOLTAGE=y
> CONFIG_REGULATOR_ANATOP=y
> CONFIG_REGULATOR_GPIO=y
> CONFIG_REGULATOR_RN5T618=y
> # CONFIG_MEDIA_CEC_SUPPORT is not set
> CONFIG_MEDIA_SUPPORT=y
> CONFIG_MEDIA_SUBDRV_AUTOSELECT=y
> # CONFIG_DVB_NET is not set
> # CONFIG_DVB_DYNAMIC_MINORS is not set
> # CONFIG_RADIO_ADAPTERS is not set
> CONFIG_V4L_PLATFORM_DRIVERS=y
> CONFIG_VIDEO_MUX=y
> CONFIG_V4L_MEM2MEM_DRIVERS=y
> CONFIG_VIDEO_CODA=y
> CONFIG_VIDEO_IMX_PXP=y
> CONFIG_VIDEO_MEM2MEM_DEINTERLACE=y
> CONFIG_VIDEO_IMX219=y
> CONFIG_VIDEO_IMX415=y
> CONFIG_IMX_IPUV3_CORE=y
> CONFIG_DRM=y
> CONFIG_DRM_PANEL_SIMPLE=y
> CONFIG_DRM_LVDS_CODEC=y
> CONFIG_DRM_IMX=y
> CONFIG_DRM_IMX_PARALLEL_DISPLAY=y
> CONFIG_DRM_IMX_TVE=y
> CONFIG_DRM_IMX_LDB=y
> CONFIG_DRM_IMX_HDMI=y
> CONFIG_DRM_ETNAVIV=y
> CONFIG_DRM_MXSFB=y
> CONFIG_FB=y
> CONFIG_FB_MODE_HELPERS=y
> CONFIG_LCD_CLASS_DEVICE=y
> CONFIG_LCD_PLATFORM=y
> CONFIG_BACKLIGHT_PWM=y
> CONFIG_BACKLIGHT_GPIO=y
> CONFIG_FRAMEBUFFER_CONSOLE=y
> CONFIG_LOGO=y
> # CONFIG_LOGO_LINUX_MONO is not set
> # CONFIG_LOGO_LINUX_VGA16 is not set
> # CONFIG_LOGO_LINUX_CLUT224 is not set
> CONFIG_SOUND=y
> CONFIG_SND=y
> CONFIG_SND_VERBOSE_PRINTK=y
> CONFIG_SND_DEBUG=y
> CONFIG_SND_DEBUG_VERBOSE=y
> # CONFIG_SND_PCI is not set
> # CONFIG_SND_USB is not set
> CONFIG_SND_SOC=y
> CONFIG_SND_SOC_FSL_ASRC=y
> CONFIG_SND_SOC_FSL_SPDIF=y
> CONFIG_SND_IMX_SOC=y
> CONFIG_SND_SOC_IMX_ZL38060=y
> CONFIG_SND_SOC_FSL_ASOC_CARD=y
> CONFIG_SND_SOC_TLV320AIC3X_I2C=y
> CONFIG_SND_SIMPLE_CARD=y
> CONFIG_SND_AUDIO_GRAPH_CARD=y
> CONFIG_USB=y
> CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
> CONFIG_USB_EHCI_HCD=y
> CONFIG_USB_CHIPIDEA=y
> CONFIG_USB_CHIPIDEA_UDC=y
> CONFIG_USB_CHIPIDEA_HOST=y
> CONFIG_NOP_USB_XCEIV=y
> CONFIG_USB_MXS_PHY=y
> CONFIG_USB_GADGET=y
> CONFIG_USB_ETH=y
> CONFIG_MMC=y
> CONFIG_MMC_SDHCI=y
> CONFIG_MMC_SDHCI_PLTFM=y
> CONFIG_MMC_SDHCI_ESDHC_IMX=y
> CONFIG_NEW_LEDS=y
> CONFIG_LEDS_CLASS=y
> CONFIG_LEDS_GPIO=y
> CONFIG_LEDS_PWM=y
> CONFIG_LEDS_TRIGGERS=y
> CONFIG_LEDS_TRIGGER_TIMER=y
> CONFIG_LEDS_TRIGGER_ONESHOT=y
> CONFIG_LEDS_TRIGGER_HEARTBEAT=y
> CONFIG_LEDS_TRIGGER_BACKLIGHT=y
> CONFIG_LEDS_TRIGGER_GPIO=y
> CONFIG_RTC_CLASS=y
> CONFIG_RTC_INTF_DEV_UIE_EMUL=y
> CONFIG_RTC_DRV_PCF8563=y
> CONFIG_RTC_DRV_MXC=y
> CONFIG_RTC_DRV_MXC_V2=y
> CONFIG_RTC_DRV_SNVS=y
> CONFIG_DMADEVICES=y
> CONFIG_FSL_EDMA=y
> CONFIG_IMX_SDMA=y
> CONFIG_MXS_DMA=y
> # CONFIG_VIRTIO_MENU is not set
> CONFIG_STAGING=y
> CONFIG_STAGING_MEDIA=y
> CONFIG_VIDEO_IMX_MEDIA=y
> CONFIG_COMMON_CLK_PWM=y
> CONFIG_IMX_GPCV2_PM_DOMAINS=y
> CONFIG_IIO=y
> CONFIG_VF610_ADC=y
> CONFIG_OPT3001=y
> CONFIG_VCNL4000=y
> CONFIG_VCNL4200=y
> CONFIG_MPL3115=y
> CONFIG_PWM=y
> CONFIG_PWM_FSL_FTM=y
> CONFIG_PWM_IMX27=y
> CONFIG_RAS=y
> CONFIG_NVMEM_IMX_OCOTP=y
> CONFIG_NVMEM_SNVS_LPGPR=y
> CONFIG_MUX_MMIO=y
> CONFIG_VALIDATE_FS_PARSER=y
> CONFIG_QUOTA=y
> CONFIG_QUOTA_NETLINK_INTERFACE=y
> # CONFIG_PRINT_QUOTA_WARNING is not set
> CONFIG_AUTOFS4_FS=y
> CONFIG_FUSE_FS=y
> CONFIG_MSDOS_FS=y
> CONFIG_VFAT_FS=y
> CONFIG_JFFS2_FS=y
> CONFIG_JFFS2_FS_WBUF_VERIFY=y
> CONFIG_JFFS2_COMPRESSION_OPTIONS=y
> CONFIG_UBIFS_FS=y
> CONFIG_SQUASHFS=y
> CONFIG_NFS_FS=y
> CONFIG_NFS_V3_ACL=y
> CONFIG_NFS_V4=y
> CONFIG_ROOT_NFS=y
> CONFIG_NLS_DEFAULT="cp437"
> CONFIG_NLS_CODEPAGE_437=y
> CONFIG_NLS_CODEPAGE_850=y
> CONFIG_NLS_ASCII=y
> CONFIG_NLS_ISO8859_1=y
> CONFIG_NLS_ISO8859_15=y
> CONFIG_NLS_UTF8=y
> CONFIG_SECURITYFS=y
> CONFIG_LSM="yama,loadpin,safesetid,integrity,selinux,smack,tomoyo,apparmor"
> CONFIG_CRYPTO_ECDH=y
> CONFIG_CRYPTO_SEQIV=y
> CONFIG_CRYPTO_SHA1=y
> CONFIG_CRYPTO_DES=y
> CONFIG_CRYPTO_DEV_FSL_CAAM=y
> CONFIG_CRYPTO_DEV_SAHARA=y
> CONFIG_CRC_CCITT=y
> CONFIG_CRC_T10DIF=y
> CONFIG_CRC_ITU_T=y
> CONFIG_CRC7=y
> CONFIG_LIBCRC32C=y
> CONFIG_CMA_SIZE_MBYTES=64
> CONFIG_FONTS=y
> CONFIG_FONT_8x8=y
> CONFIG_FONT_8x16=y
> CONFIG_PRINTK_TIME=y
> # CONFIG_DEBUG_BUGVERBOSE is not set
> CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_FS=y
> CONFIG_PANIC_TIMEOUT=1
> # CONFIG_SCHED_DEBUG is not set
> CONFIG_PROVE_LOCKING=y
> # CONFIG_RCU_TRACE is not set
> # CONFIG_FTRACE is not set
>
>
>
> Am 17.05.2022 um 20:55 schrieb Marian Postevca:
>> 12 May 2022 16:39:02 Maximilian Senftleben<kernel@...l.msdigital.de>:
>>
>>> [1.] One line summary of the problem:
>>>
>>> No static MAC address for usb gadget ethernet via kernel boot parameter any more.
>>>
>>> [2.] Full description of the problem/report:
>>>
>>> In 5.15. and before we were able to set a static MAC address for the usb gadget ethernet connection using kernel parameters "g_ether.dev_addr" and "g_ether.host_addr".
>>> Since 5.16. and more concrete after commit 890d5b40908bfd1a79be018d2d297cf9df60f4ee, this is no longer possible, and a random MAC address is assigned.
>>> (Possible Regression)
>>>
>>> [3.] Keywords (i.e., modules, networking, kernel):
>>> usb, gadget, mac, g_ether
>>>
>>> [4.] Kernel information
>>> [4.1.] Kernel version (from /proc/version):
>>> Linux version 5.17.4-141174-ge11818a6ec02 (ms@...al) (arm-v7a-linux-gnueabihf-gcc (OSELAS.Toolchain-2020.08.0 10-20200822) 10.2.1 20200822, GNU ld (GNU Binutils) 2.35) #14 SMP Thu May 12 13:51:50 CEST 2022
>>> [4.2.] Kernel .config file:
>>> -
>> Could you please send the kernel .config file and kernel command line with which you reproduce this issue?

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