qemu/cvm-Implement-command-blacklist-for-cvm-security-enh.patch

From 384b3f41fd69ed6f5bf376ff1aac1a12deeea0fb Mon Sep 17 00:00:00 2001
From: liupingwei <liupingwei0317@outlook.com>
Date: Fri, 16 Aug 2024 18:06:10 +0800
Subject: [PATCH] cvm : Implement command blacklist for cvm security
 enhancement

Added a new feature to intercept and block specific virsh commands(virsh
save,virsh restore,virsh dump,virsh suspend,virsh resume)that can impact
the security of cvm.

Signed-off-by: liupingwei <liupingwei0317@outlook.com>
---
 dump/dump.c                    | 7 +++++++
 migration/migration-hmp-cmds.c | 6 ++++++
 migration/savevm.c             | 6 ++++++
 monitor/qmp-cmds.c             | 6 ++++++
 4 files changed, 25 insertions(+)

diff --git a/dump/dump.c b/dump/dump.c
index 4819050764..787059ac2c 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -20,6 +20,7 @@
 #include "sysemu/dump.h"
 #include "sysemu/runstate.h"
 #include "sysemu/cpus.h"
+#include "sysemu/kvm.h"
 #include "qapi/error.h"
 #include "qapi/qapi-commands-dump.h"
 #include "qapi/qapi-events-dump.h"
@@ -2065,6 +2066,12 @@ void qmp_dump_guest_memory(bool paging, const char *protocol,
                            Error **errp)
 {
     ERRP_GUARD();
+
+    if (virtcca_cvm_enabled()) {
+        error_setg(errp, "The dump-guest-memory command is temporarily unsupported in cvm.");
+        return;
+    }
+
     const char *p;
     int fd;
     DumpState *s;
diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
index 1fa6a5f478..386ba7fc98 100644
--- a/migration/migration-hmp-cmds.c
+++ b/migration/migration-hmp-cmds.c
@@ -30,6 +30,7 @@
 #include "sysemu/runstate.h"
 #include "ui/qemu-spice.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
 #include "options.h"
 #include "migration.h"
 
@@ -406,6 +407,11 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict)
     const char *name = qdict_get_str(qdict, "name");
     Error *err = NULL;
 
+    if (virtcca_cvm_enabled()) {
+        error_setg(&err, "The loadvm command is temporarily unsupported in cvm.");
+        return;
+    }
+
     vm_stop(RUN_STATE_RESTORE_VM);
 
     if (load_snapshot(name, NULL, false, NULL, &err) && saved_vm_running) {
diff --git a/migration/savevm.c b/migration/savevm.c
index 477a19719f..cc65da605e 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -61,6 +61,7 @@
 #include "sysemu/replay.h"
 #include "sysemu/runstate.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/kvm.h"
 #include "sysemu/xen.h"
 #include "migration/colo.h"
 #include "qemu/bitmap.h"
@@ -3044,6 +3045,11 @@ int qemu_loadvm_approve_switchover(void)
 bool save_snapshot(const char *name, bool overwrite, const char *vmstate,
                   bool has_devices, strList *devices, Error **errp)
 {
+    if (virtcca_cvm_enabled()) {
+        error_setg(errp, "The savevm command is temporarily unsupported in cvm.");
+        return false;
+    }
+
     BlockDriverState *bs;
     QEMUSnapshotInfo sn1, *sn = &sn1;
     int ret = -1, ret2;
diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index e78462b857..c0b66f11bf 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -23,6 +23,7 @@
 #include "sysemu/runstate.h"
 #include "sysemu/runstate-action.h"
 #include "sysemu/block-backend.h"
+#include "sysemu/kvm.h"
 #include "qapi/error.h"
 #include "qapi/qapi-init-commands.h"
 #include "qapi/qapi-commands-control.h"
@@ -50,6 +51,11 @@ void qmp_quit(Error **errp)
 
 void qmp_stop(Error **errp)
 {
+    if (virtcca_cvm_enabled()) {
+        error_setg(errp, "The stop command is temporarily unsupported in cvm.");
+        return;
+    }
+
     /* if there is a dump in background, we should wait until the dump
      * finished */
     if (qemu_system_dump_in_progress()) {
-- 
2.41.0.windows.1