Merge tag 'migration-20230302-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migraiton Pull request

Hi

This pull requests include:
- use-after-free in test-vmstate (eric)
- fix exec migration in windows (berberian)

Please apply.

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* tag 'migration-20230302-pull-request' of https://gitlab.com/juan.quintela/qemu:
  Fix exec migration on Windows (w32+w64).
  test-vmstate: fix bad GTree usage, use-after-free

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 26 insertions, 3 deletions

diff --git a/migration/exec.c b/migration/exec.c
index 375d2e1b54..38604d73a6 100644
--- a/migration/exec.c
+++ b/migration/exec.c
@@ -23,12 +23,31 @@
 #include "migration.h"
 #include "io/channel-command.h"
 #include "trace.h"
+#include "qemu/cutils.h"
 
+#ifdef WIN32
+const char *exec_get_cmd_path(void);
+const char *exec_get_cmd_path(void)
+{
+    g_autofree char *detected_path = g_new(char, MAX_PATH);
+    if (GetSystemDirectoryA(detected_path, MAX_PATH) == 0) {
+        warn_report("Could not detect cmd.exe path, using default.");
+        return "C:\\Windows\\System32\\cmd.exe";
+    }
+    pstrcat(detected_path, MAX_PATH, "\\cmd.exe");
+    return g_steal_pointer(&detected_path);
+}
+#endif
 
 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
 {
     QIOChannel *ioc;
+
+#ifdef WIN32
+    const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL };
+#else
     const char *argv[] = { "/bin/sh", "-c", command, NULL };
+#endif
 
     trace_migration_exec_outgoing(command);
     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
@@ -55,7 +74,12 @@ static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
 void exec_start_incoming_migration(const char *command, Error **errp)
 {
     QIOChannel *ioc;
+
+#ifdef WIN32
+    const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL };
+#else
     const char *argv[] = { "/bin/sh", "-c", command, NULL };
+#endif
 
     trace_migration_exec_incoming(command);
     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
diff --git a/tests/unit/test-vmstate.c b/tests/unit/test-vmstate.c
index 79357b29ca..0b7d5ecd68 100644
--- a/tests/unit/test-vmstate.c
+++ b/tests/unit/test-vmstate.c
@@ -1073,7 +1073,6 @@ static gboolean diff_tree(gpointer key, gpointer value, gpointer data)
     struct match_node_data d = {tp->tree2, key, value};
 
     g_tree_foreach(tp->tree2, tp->match_node, &d);
-    g_tree_remove(tp->tree1, key);
     return false;
 }
 
@@ -1082,9 +1081,9 @@ static void compare_trees(GTree *tree1, GTree *tree2,
 {
     struct tree_cmp_data tp = {tree1, tree2, function};
 
+    assert(g_tree_nnodes(tree1) == g_tree_nnodes(tree2));
     g_tree_foreach(tree1, diff_tree, &tp);
-    assert(g_tree_nnodes(tree1) == 0);
-    assert(g_tree_nnodes(tree2) == 0);
+    g_tree_destroy(g_tree_ref(tree1));
 }
 
 static void diff_domain(TestGTreeDomain *d1, TestGTreeDomain *d2)