Re: [cip-dev] [PATCH 1/1] Secureboot: Disable initramfs debug shell

["Jan Kiszka" <jan.kiszka@siemens.com>]

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On 19.03.21 08:20, Michael Adler wrote:
> This closes a loophole introduced by the initramfs debug shell which is
> enabled by default:
> 
> "The initramfs-tools package includes a debug shell in the initrds it
> generates. If for example the initrd is unable to mount your root file
> system, you will be dropped into this debug shell which has basic
> commands available to help trace the problem and possibly fix it." [1]
> 
> [1] https://www.debian.org/releases/buster/amd64/release-notes/ch-upgrading.en.html#recovery-initrd
> 
> Signed-off-by: Michael Adler <michael.adler@siemens.com>
> ---
>  wic/qemu-amd64-efibootguard-secureboot.wks | 2 ++
>  wic/qemu-amd64-efibootguard.wks            | 2 ++
>  wic/simatic-ipc227e-efibootguard.wks       | 2 ++
>  wic/swupdate-partition.inc                 | 2 --
>  4 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/wic/qemu-amd64-efibootguard-secureboot.wks b/wic/qemu-amd64-efibootguard-secureboot.wks
> index 9ccf501..ff351db 100644
> --- a/wic/qemu-amd64-efibootguard-secureboot.wks
> +++ b/wic/qemu-amd64-efibootguard-secureboot.wks
> @@ -7,3 +7,5 @@ part --source efibootguard-boot --ondisk sda --size 32M --extra-space 0 --overhe
>  part --source efibootguard-boot --ondisk sda --size 32M --extra-space 0 --overhead-factor 1 --label BOOT1 --align 1024 --part-type=0700 --sourceparams "revision=1,unified-kernel=y,signwith=/usr/bin/sign_secure_image.sh"
>  
>  include swupdate-partition.inc
> +
> +bootloader --ptable gpt --append="console=tty0 console=ttyS0,115200 rootwait earlyprintk panic=0"
> diff --git a/wic/qemu-amd64-efibootguard.wks b/wic/qemu-amd64-efibootguard.wks
> index a9a8446..6653068 100644
> --- a/wic/qemu-amd64-efibootguard.wks
> +++ b/wic/qemu-amd64-efibootguard.wks
> @@ -2,3 +2,5 @@
>  # long-description: Disk image for qemu-amd64 with EFI Boot Guard and SWUpdate
>  include ebg-sysparts.inc
>  include swupdate-partition.inc
> +
> +bootloader --ptable gpt --append="console=tty0 console=ttyS0,115200 rootwait earlyprintk"
> diff --git a/wic/simatic-ipc227e-efibootguard.wks b/wic/simatic-ipc227e-efibootguard.wks
> index 74446d3..f6191bc 100644
> --- a/wic/simatic-ipc227e-efibootguard.wks
> +++ b/wic/simatic-ipc227e-efibootguard.wks
> @@ -3,3 +3,5 @@
>  
>  include ebg-sysparts.inc
>  include swupdate-partition.inc
> +
> +bootloader --ptable gpt --append="console=tty0 console=ttyS0,115200 rootwait earlyprintk"
> diff --git a/wic/swupdate-partition.inc b/wic/swupdate-partition.inc
> index 15fbe80..7bec9d7 100644
> --- a/wic/swupdate-partition.inc
> +++ b/wic/swupdate-partition.inc
> @@ -1,4 +1,2 @@
>  part --source rootfs --uuid "fedcba98-7654-3210-cafe-5e0710000001" --size 1000M   --extra-space 128M --overhead-factor 1 --label systema --align 1024 --fstype=ext4
>  part  --source rootfs --uuid "fedcba98-7654-3210-cafe-5e0710000002" --size 1000M   --extra-space 128M --overhead-factor 1 --label systemb --align 1024 --fstype=ext4
> -
> -bootloader --ptable gpt --append="console=tty0 console=ttyS0,115200 rootwait earlyprintk"
> 

Thanks, applied.

Jan

-- 
Siemens AG, T RDA IOT
Corporate Competence Center Embedded Linux

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