kernel: drop FireWire (IEEE 1394) support

  Similar to Thunderbolt, supporting FireWire is dangerous as it allows
Direct Memory Attacks, which are known to be actively used by more
sophisticated attackers (https://wikileaks[.]org/spyfiles/files/0/293_GAMMA-201110-FinFireWire.pdf).

Since network hardware using FireWire is diminishing, and there is no
other legitimate reason to use FireWire on an IPFire machine, dropping
support for it looks reasonable to me.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
---
 config/kernel/kernel.config.aarch64-ipfire    | 12 +---------
 .../kernel.config.armv5tel-ipfire-multi       | 12 +---------
 config/kernel/kernel.config.i586-ipfire       | 23 +------------------
 config/kernel/kernel.config.x86_64-ipfire     | 23 +------------------
 4 files changed, 4 insertions(+), 66 deletions(-)
  

Good morning Peter,

since firewire hardware is basically non-existant for many many years I
do not think that this patch drastically improved the security of the
system.

If an attacker has physical access to the system, other attacks are
possible, too, and firewire is not a necessity.

However, there is no reason left to actually compile this. It wastes
more build power than it is useful.

So I can ack this:

Acked-by: Michael Tremer <michael.tremer@ipfire.org>

I suppose that again you didn't build this because there are no roofile
changes?!

Best,
-Michael

On Sat, 2020-07-25 at 19:46 +0000, Peter Müller wrote:
> Similar to Thunderbolt, supporting FireWire is dangerous as it allows
> Direct Memory Attacks, which are known to be actively used by more
> sophisticated attackers (
> https://wikileaks[.]org/spyfiles/files/0/293_GAMMA-201110-FinFireWire.pdf
> ).
> 
> Since network hardware using FireWire is diminishing, and there is no
> other legitimate reason to use FireWire on an IPFire machine,
> dropping
> support for it looks reasonable to me.
> 
> Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
> ---
>  config/kernel/kernel.config.aarch64-ipfire    | 12 +---------
>  .../kernel.config.armv5tel-ipfire-multi       | 12 +---------
>  config/kernel/kernel.config.i586-ipfire       | 23 +--------------
> ----
>  config/kernel/kernel.config.x86_64-ipfire     | 23 +--------------
> ----
>  4 files changed, 4 insertions(+), 66 deletions(-)
> 
> diff --git a/config/kernel/kernel.config.aarch64-ipfire
> b/config/kernel/kernel.config.aarch64-ipfire
> index c616cbb85..03dc67c06 100644
> --- a/config/kernel/kernel.config.aarch64-ipfire
> +++ b/config/kernel/kernel.config.aarch64-ipfire
> @@ -1936,10 +1936,7 @@ CONFIG_DM_SWITCH=m
>  #
>  # IEEE 1394 (FireWire) support
>  #
> -CONFIG_FIREWIRE=m
> -CONFIG_FIREWIRE_OHCI=m
> -CONFIG_FIREWIRE_SBP2=m
> -# CONFIG_FIREWIRE_NET is not set
> +# CONFIG_FIREWIRE is not set
>  # CONFIG_FIREWIRE_NOSY is not set
>  CONFIG_NETDEVICES=y
>  CONFIG_MII=m
> @@ -3899,11 +3896,6 @@ CONFIG_VIDEO_SH_VEU=m
>  # Supported MMC/SDIO adapters
>  #
>  # CONFIG_SMS_SDIO_DRV is not set
> -
> -#
> -# Supported FireWire (IEEE 1394) Adapters
> -#
> -# CONFIG_DVB_FIREDTV is not set
>  CONFIG_MEDIA_COMMON_OPTIONS=y
>  
>  #
> @@ -4550,7 +4542,6 @@ CONFIG_SND_BCD2000=m
>  # CONFIG_SND_USB_PODHD is not set
>  # CONFIG_SND_USB_TONEPORT is not set
>  # CONFIG_SND_USB_VARIAX is not set
> -# CONFIG_SND_FIREWIRE is not set
>  CONFIG_SND_SOC=m
>  CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM=y
>  # CONFIG_SND_SOC_AMD_ACP is not set
> @@ -5471,7 +5462,6 @@ CONFIG_STAGING=y
>  #
>  # CONFIG_STAGING_BOARD is not set
>  CONFIG_LTE_GDM724X=m
> -# CONFIG_FIREWIRE_SERIAL is not set
>  # CONFIG_LNET is not set
>  # CONFIG_DGNC is not set
>  # CONFIG_GS_FPGABOOT is not set
> diff --git a/config/kernel/kernel.config.armv5tel-ipfire-multi
> b/config/kernel/kernel.config.armv5tel-ipfire-multi
> index 5280a6a62..fb667f367 100644
> --- a/config/kernel/kernel.config.armv5tel-ipfire-multi
> +++ b/config/kernel/kernel.config.armv5tel-ipfire-multi
> @@ -2206,10 +2206,7 @@ CONFIG_DM_SWITCH=m
>  #
>  # IEEE 1394 (FireWire) support
>  #
> -CONFIG_FIREWIRE=m
> -CONFIG_FIREWIRE_OHCI=m
> -CONFIG_FIREWIRE_SBP2=m
> -# CONFIG_FIREWIRE_NET is not set
> +# CONFIG_FIREWIRE is not set
>  # CONFIG_FIREWIRE_NOSY is not set
>  CONFIG_NETDEVICES=y
>  CONFIG_MII=m
> @@ -4260,11 +4257,6 @@ CONFIG_VIDEO_TI_CSC=m
>  # Supported MMC/SDIO adapters
>  #
>  # CONFIG_SMS_SDIO_DRV is not set
> -
> -#
> -# Supported FireWire (IEEE 1394) Adapters
> -#
> -# CONFIG_DVB_FIREDTV is not set
>  CONFIG_MEDIA_COMMON_OPTIONS=y
>  
>  #
> @@ -4966,7 +4958,6 @@ CONFIG_SND_BCD2000=m
>  # CONFIG_SND_USB_PODHD is not set
>  # CONFIG_SND_USB_TONEPORT is not set
>  # CONFIG_SND_USB_VARIAX is not set
> -# CONFIG_SND_FIREWIRE is not set
>  CONFIG_SND_SOC=m
>  CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM=y
>  # CONFIG_SND_SOC_AMD_ACP is not set
> @@ -5946,7 +5937,6 @@ CONFIG_STAGING=y
>  #
>  # CONFIG_STAGING_BOARD is not set
>  CONFIG_LTE_GDM724X=m
> -# CONFIG_FIREWIRE_SERIAL is not set
>  # CONFIG_LNET is not set
>  # CONFIG_DGNC is not set
>  # CONFIG_GS_FPGABOOT is not set
> diff --git a/config/kernel/kernel.config.i586-ipfire
> b/config/kernel/kernel.config.i586-ipfire
> index 3e31119f6..7235b70f2 100644
> --- a/config/kernel/kernel.config.i586-ipfire
> +++ b/config/kernel/kernel.config.i586-ipfire
> @@ -2107,10 +2107,7 @@ CONFIG_FUSION_LOGGING=y
>  #
>  # IEEE 1394 (FireWire) support
>  #
> -CONFIG_FIREWIRE=m
> -CONFIG_FIREWIRE_OHCI=m
> -CONFIG_FIREWIRE_SBP2=m
> -# CONFIG_FIREWIRE_NET is not set
> +# CONFIG_FIREWIRE is not set
>  # CONFIG_FIREWIRE_NOSY is not set
>  CONFIG_MACINTOSH_DRIVERS=y
>  # CONFIG_MAC_EMUMOUSEBTN is not set
> @@ -4119,12 +4116,6 @@ CONFIG_DVB_PLATFORM_DRIVERS=y
>  # Supported MMC/SDIO adapters
>  #
>  # CONFIG_SMS_SDIO_DRV is not set
> -
> -#
> -# Supported FireWire (IEEE 1394) Adapters
> -#
> -CONFIG_DVB_FIREDTV=m
> -CONFIG_DVB_FIREDTV_INPUT=y
>  CONFIG_MEDIA_COMMON_OPTIONS=y
>  
>  #
> @@ -4880,17 +4871,6 @@ CONFIG_SND_USB_POD=m
>  CONFIG_SND_USB_PODHD=m
>  CONFIG_SND_USB_TONEPORT=m
>  CONFIG_SND_USB_VARIAX=m
> -CONFIG_SND_FIREWIRE=y
> -CONFIG_SND_FIREWIRE_LIB=m
> -CONFIG_SND_DICE=m
> -CONFIG_SND_OXFW=m
> -# CONFIG_SND_ISIGHT is not set
> -CONFIG_SND_FIREWORKS=m
> -CONFIG_SND_BEBOB=m
> -CONFIG_SND_FIREWIRE_DIGI00X=m
> -CONFIG_SND_FIREWIRE_TASCAM=m
> -# CONFIG_SND_FIREWIRE_MOTU is not set
> -# CONFIG_SND_FIREFACE is not set
>  CONFIG_SND_PCMCIA=y
>  # CONFIG_SND_VXPOCKET is not set
>  # CONFIG_SND_PDAUDIOCF is not set
> @@ -5608,7 +5588,6 @@ CONFIG_FB_SM750=m
>  # Android
>  #
>  CONFIG_LTE_GDM724X=m
> -# CONFIG_FIREWIRE_SERIAL is not set
>  # CONFIG_LNET is not set
>  # CONFIG_DGNC is not set
>  # CONFIG_GS_FPGABOOT is not set
> diff --git a/config/kernel/kernel.config.x86_64-ipfire
> b/config/kernel/kernel.config.x86_64-ipfire
> index f6953482f..0e56a0a69 100644
> --- a/config/kernel/kernel.config.x86_64-ipfire
> +++ b/config/kernel/kernel.config.x86_64-ipfire
> @@ -2085,10 +2085,7 @@ CONFIG_FUSION_LOGGING=y
>  #
>  # IEEE 1394 (FireWire) support
>  #
> -CONFIG_FIREWIRE=m
> -CONFIG_FIREWIRE_OHCI=m
> -CONFIG_FIREWIRE_SBP2=m
> -# CONFIG_FIREWIRE_NET is not set
> +# CONFIG_FIREWIRE is not set
>  # CONFIG_FIREWIRE_NOSY is not set
>  CONFIG_MACINTOSH_DRIVERS=y
>  # CONFIG_MAC_EMUMOUSEBTN is not set
> @@ -4012,12 +4009,6 @@ CONFIG_VIDEO_SH_VEU=m
>  # Supported MMC/SDIO adapters
>  #
>  # CONFIG_SMS_SDIO_DRV is not set
> -
> -#
> -# Supported FireWire (IEEE 1394) Adapters
> -#
> -CONFIG_DVB_FIREDTV=m
> -CONFIG_DVB_FIREDTV_INPUT=y
>  CONFIG_MEDIA_COMMON_OPTIONS=y
>  
>  #
> @@ -4719,17 +4710,6 @@ CONFIG_SND_USB_POD=m
>  CONFIG_SND_USB_PODHD=m
>  CONFIG_SND_USB_TONEPORT=m
>  CONFIG_SND_USB_VARIAX=m
> -CONFIG_SND_FIREWIRE=y
> -CONFIG_SND_FIREWIRE_LIB=m
> -# CONFIG_SND_DICE is not set
> -CONFIG_SND_OXFW=m
> -# CONFIG_SND_ISIGHT is not set
> -CONFIG_SND_FIREWORKS=m
> -CONFIG_SND_BEBOB=m
> -CONFIG_SND_FIREWIRE_DIGI00X=m
> -CONFIG_SND_FIREWIRE_TASCAM=m
> -# CONFIG_SND_FIREWIRE_MOTU is not set
> -# CONFIG_SND_FIREFACE is not set
>  CONFIG_SND_PCMCIA=y
>  # CONFIG_SND_VXPOCKET is not set
>  # CONFIG_SND_PDAUDIOCF is not set
> @@ -5472,7 +5452,6 @@ CONFIG_RTLWIFI_DEBUG_ST=y
>  # Android
>  #
>  CONFIG_LTE_GDM724X=m
> -# CONFIG_FIREWIRE_SERIAL is not set
>  # CONFIG_LNET is not set
>  # CONFIG_DGNC is not set
>  # CONFIG_GS_FPGABOOT is not set