feat: enable INET_DIAG

Fixes: siderolabs#1028 INET_DIAG_DESTROY is used by CNIs such as Cilium to terminate connections in other containers. KSPP recommends to disable it due to "Prior to v4.1, assists heap memory attacks; best to keep interface disabled.". Linux 4.1 was almost 10 years ago and Cilium with their eBPF-based kube-proxy replacement is widely used by the community and not having this enabled leads to weird networking issues (e.g. when coredns pods get a different IP due deployment restarts UDP dns clients keep sending connections to the old IP) Signed-off-by: Ströger Florian <[email protected]>
Preisschild · Sep 17, 2024 · 4f7f0e1 · 4f7f0e1
1 parent c9f7eb9
commit 4f7f0e1
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Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/kernel/build/config-amd64 b/kernel/build/config-amd64
@@ -1163,7 +1163,11 @@ CONFIG_INET_IPCOMP=y
 CONFIG_INET_TABLE_PERTURB_ORDER=16
 CONFIG_INET_XFRM_TUNNEL=y
 CONFIG_INET_TUNNEL=y
-# CONFIG_INET_DIAG is not set
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+CONFIG_INET_UDP_DIAG=y
+# CONFIG_INET_RAW_DIAG is not set
+CONFIG_INET_DIAG_DESTROY=y
 CONFIG_TCP_CONG_ADVANCED=y
 # CONFIG_TCP_CONG_BIC is not set
 CONFIG_TCP_CONG_CUBIC=y

diff --git a/kernel/build/config-arm64 b/kernel/build/config-arm64
@@ -1198,7 +1198,11 @@ CONFIG_INET_IPCOMP=y
 CONFIG_INET_TABLE_PERTURB_ORDER=16
 CONFIG_INET_XFRM_TUNNEL=y
 CONFIG_INET_TUNNEL=y
-# CONFIG_INET_DIAG is not set
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+CONFIG_INET_UDP_DIAG=y
+# CONFIG_INET_RAW_DIAG is not set
+CONFIG_INET_DIAG_DESTROY=y
 CONFIG_TCP_CONG_ADVANCED=y
 # CONFIG_TCP_CONG_BIC is not set
 CONFIG_TCP_CONG_CUBIC=y

diff --git a/kernel/build/scripts/filter-hardened-check.py b/kernel/build/scripts/filter-hardened-check.py
@@ -31,6 +31,7 @@
     'CONFIG_SECURITY_SELINUX_DEVELOP', # SELinux enabled, but permissive unless enforcing=1. TODO: force enforcing mode when complete
     'CONFIG_SPECULATION_MITIGATIONS', # Renamed in the kernel to 'CONFIG_CPU_MITIGATIONS'
     'CONFIG_EFI_DISABLE_PCI_DMA', # enabling this breaks boot with no visible error messages to debug (https://github.com/siderolabs/talos/issues/8743)
+    'CONFIG_INET_DIAG', # last vulnerability prior to v4.1. Required for CNIs such as Cilium to terminate sockets. (https://github.com/siderolabs/pkgs/issues/1028)
 }
 
 """