app-containers/runc: remove unused patch(es)

Package-Manager: Portage-3.0.30, Repoman-3.0.3
Signed-off-by: Michael Mair-Keimberger <mmk@levelnine.at>
Closes: https://github.com/gentoo/gentoo/pull/25043
Signed-off-by: Sam James <sam@gentoo.org>

app-containers/runc/files/CVE-2021-43784.patch

@@ -1,86 +0,0 @@
-From b8dbe46687c2a96efa9252b69d3fc1ce33bdc416 Mon Sep 17 00:00:00 2001
-From: Aleksa Sarai <cyphar@cyphar.com>
-Date: Thu, 18 Nov 2021 16:12:59 +1100
-Subject: [PATCH] runc init: avoid netlink message length overflows
-
-When writing netlink messages, it is possible to have a byte array
-larger than UINT16_MAX which would result in the length field
-overflowing and allowing user-controlled data to be parsed as control
-characters (such as creating custom mount points, changing which set of
-namespaces to allow, and so on).
-
-Co-authored-by: Kir Kolyshkin <kolyshkin@gmail.com>
-Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
-Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
----
- libcontainer/container_linux.go | 20 +++++++++++++++++++-
- libcontainer/message_linux.go   |  9 +++++++++
- 2 files changed, 28 insertions(+), 1 deletion(-)
-
-diff --git a/libcontainer/container_linux.go b/libcontainer/container_linux.go
-index 6ce1854f68..1484703b0c 100644
---- a/libcontainer/container_linux.go
-+++ b/libcontainer/container_linux.go
-@@ -2028,16 +2028,34 @@ func encodeIDMapping(idMap []configs.IDMap) ([]byte, error) {
- 	return data.Bytes(), nil
- }
- 
-+// netlinkError is an error wrapper type for use by custom netlink message
-+// types. Panics with errors are wrapped in netlinkError so that the recover
-+// in bootstrapData can distinguish intentional panics.
-+type netlinkError struct{ error }
-+
- // bootstrapData encodes the necessary data in netlink binary format
- // as a io.Reader.
- // Consumer can write the data to a bootstrap program
- // such as one that uses nsenter package to bootstrap the container's
- // init process correctly, i.e. with correct namespaces, uid/gid
- // mapping etc.
--func (c *linuxContainer) bootstrapData(cloneFlags uintptr, nsMaps map[configs.NamespaceType]string) (io.Reader, error) {
-+func (c *linuxContainer) bootstrapData(cloneFlags uintptr, nsMaps map[configs.NamespaceType]string) (_ io.Reader, Err error) {
- 	// create the netlink message
- 	r := nl.NewNetlinkRequest(int(InitMsg), 0)
- 
-+	// Our custom messages cannot bubble up an error using returns, instead
-+	// they will panic with the specific error type, netlinkError. In that
-+	// case, recover from the panic and return that as an error.
-+	defer func() {
-+		if r := recover(); r != nil {
-+			if e, ok := r.(netlinkError); ok {
-+				Err = e.error
-+			} else {
-+				panic(r)
-+			}
-+		}
-+	}()
-+
- 	// write cloneFlags
- 	r.AddData(&Int32msg{
- 		Type:  CloneFlagsAttr,
-diff --git a/libcontainer/message_linux.go b/libcontainer/message_linux.go
-index 1d4f5033aa..e4107ce39f 100644
---- a/libcontainer/message_linux.go
-+++ b/libcontainer/message_linux.go
-@@ -3,6 +3,9 @@
- package libcontainer
- 
- import (
-+	"fmt"
-+	"math"
-+
- 	"github.com/vishvananda/netlink/nl"
- 	"golang.org/x/sys/unix"
- )
-@@ -54,6 +57,12 @@ type Bytemsg struct {
- 
- func (msg *Bytemsg) Serialize() []byte {
- 	l := msg.Len()
-+	if l > math.MaxUint16 {
-+		// We cannot return nil nor an error here, so we panic with
-+		// a specific type instead, which is handled via recover in
-+		// bootstrapData.
-+		panic(netlinkError{fmt.Errorf("netlink: cannot serialize bytemsg of length %d (larger than UINT16_MAX)", l)})
-+	}
- 	buf := make([]byte, (l+unix.NLA_ALIGNTO-1) & ^(unix.NLA_ALIGNTO-1))
- 	native := nl.NativeEndian()
- 	native.PutUint16(buf[0:2], uint16(l))