Kernel: Disable support for RPC dprintk debugging

  This is solely needed for debugging of NFS issues. Due to the attack
surface it introduces, grsecurity recommends to disable it; as we do not
have a strict necessity for this feature, it is best to follow that
recommendation for security reasons.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
---
 config/kernel/kernel.config.aarch64-ipfire | 3 +--
 config/kernel/kernel.config.armv6l-ipfire  | 3 +--
 config/kernel/kernel.config.riscv64-ipfire | 3 +--
 config/kernel/kernel.config.x86_64-ipfire  | 3 +--
 4 files changed, 4 insertions(+), 8 deletions(-)
  

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

> On 11 Jun 2022, at 19:47, Peter Müller <peter.mueller@ipfire.org> wrote:
> 
> This is solely needed for debugging of NFS issues. Due to the attack
> surface it introduces, grsecurity recommends to disable it; as we do not
> have a strict necessity for this feature, it is best to follow that
> recommendation for security reasons.
> 
> Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
> ---
> config/kernel/kernel.config.aarch64-ipfire | 3 +--
> config/kernel/kernel.config.armv6l-ipfire  | 3 +--
> config/kernel/kernel.config.riscv64-ipfire | 3 +--
> config/kernel/kernel.config.x86_64-ipfire  | 3 +--
> 4 files changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
> index 6dfeae595..4cbb3604e 100644
> --- a/config/kernel/kernel.config.aarch64-ipfire
> +++ b/config/kernel/kernel.config.aarch64-ipfire
> @@ -7433,7 +7433,6 @@ CONFIG_NFS_V4_SECURITY_LABEL=y
> CONFIG_NFS_FSCACHE=y
> # CONFIG_NFS_USE_LEGACY_DNS is not set
> CONFIG_NFS_USE_KERNEL_DNS=y
> -CONFIG_NFS_DEBUG=y
> CONFIG_NFS_DISABLE_UDP_SUPPORT=y
> # CONFIG_NFS_V4_2_READ_PLUS is not set
> CONFIG_NFSD=m
> @@ -7457,7 +7456,7 @@ CONFIG_SUNRPC_GSS=m
> CONFIG_SUNRPC_BACKCHANNEL=y
> CONFIG_RPCSEC_GSS_KRB5=m
> # CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
> -CONFIG_SUNRPC_DEBUG=y
> +# CONFIG_SUNRPC_DEBUG is not set
> # CONFIG_CEPH_FS is not set
> CONFIG_CIFS=m
> # CONFIG_CIFS_STATS2 is not set
> diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire
> index 1bb745a87..6347e2af2 100644
> --- a/config/kernel/kernel.config.armv6l-ipfire
> +++ b/config/kernel/kernel.config.armv6l-ipfire
> @@ -7439,7 +7439,6 @@ CONFIG_NFS_V4_SECURITY_LABEL=y
> CONFIG_NFS_FSCACHE=y
> # CONFIG_NFS_USE_LEGACY_DNS is not set
> CONFIG_NFS_USE_KERNEL_DNS=y
> -CONFIG_NFS_DEBUG=y
> CONFIG_NFS_DISABLE_UDP_SUPPORT=y
> # CONFIG_NFS_V4_2_READ_PLUS is not set
> CONFIG_NFSD=m
> @@ -7463,7 +7462,7 @@ CONFIG_SUNRPC_GSS=m
> CONFIG_SUNRPC_BACKCHANNEL=y
> CONFIG_RPCSEC_GSS_KRB5=m
> # CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
> -CONFIG_SUNRPC_DEBUG=y
> +# CONFIG_SUNRPC_DEBUG is not set
> # CONFIG_CEPH_FS is not set
> CONFIG_CIFS=m
> # CONFIG_CIFS_STATS2 is not set
> diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire
> index 2d1fdbd28..60aee16d4 100644
> --- a/config/kernel/kernel.config.riscv64-ipfire
> +++ b/config/kernel/kernel.config.riscv64-ipfire
> @@ -6071,7 +6071,6 @@ CONFIG_NFS_V4_SECURITY_LABEL=y
> CONFIG_NFS_FSCACHE=y
> # CONFIG_NFS_USE_LEGACY_DNS is not set
> CONFIG_NFS_USE_KERNEL_DNS=y
> -CONFIG_NFS_DEBUG=y
> CONFIG_NFS_DISABLE_UDP_SUPPORT=y
> CONFIG_NFS_V4_2_READ_PLUS=y
> CONFIG_NFSD=m
> @@ -6095,7 +6094,7 @@ CONFIG_SUNRPC_GSS=m
> CONFIG_SUNRPC_BACKCHANNEL=y
> CONFIG_RPCSEC_GSS_KRB5=m
> # CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
> -CONFIG_SUNRPC_DEBUG=y
> +# CONFIG_SUNRPC_DEBUG is not set
> # CONFIG_CEPH_FS is not set
> CONFIG_CIFS=m
> # CONFIG_CIFS_STATS2 is not set
> diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
> index b84698235..f7b03831d 100644
> --- a/config/kernel/kernel.config.x86_64-ipfire
> +++ b/config/kernel/kernel.config.x86_64-ipfire
> @@ -6847,7 +6847,6 @@ CONFIG_NFS_V4_SECURITY_LABEL=y
> CONFIG_NFS_FSCACHE=y
> # CONFIG_NFS_USE_LEGACY_DNS is not set
> CONFIG_NFS_USE_KERNEL_DNS=y
> -CONFIG_NFS_DEBUG=y
> CONFIG_NFS_DISABLE_UDP_SUPPORT=y
> CONFIG_NFS_V4_2_READ_PLUS=y
> CONFIG_NFSD=m
> @@ -6871,7 +6870,7 @@ CONFIG_SUNRPC_GSS=m
> CONFIG_SUNRPC_BACKCHANNEL=y
> CONFIG_RPCSEC_GSS_KRB5=m
> # CONFIG_SUNRPC_DISABLE_INSECURE_ENCTYPES is not set
> -CONFIG_SUNRPC_DEBUG=y
> +# CONFIG_SUNRPC_DEBUG is not set
> # CONFIG_CEPH_FS is not set
> CONFIG_CIFS=m
> # CONFIG_CIFS_STATS2 is not set
> -- 
> 2.35.3