[PULL for-6.1 1/1] qga: fix leak of base64 decoded data on command error

[Michael Roth <michael.roth@amd.com>]

From: Daniel P. Berrangé <berrange@redhat.com>

If the guest command fails to be spawned, then we would leak the decoded
base64 input used for the command's stdin feed.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 qga/commands.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/qga/commands.c b/qga/commands.c
index a6491d2cf8..80501e4a73 100644
--- a/qga/commands.c
+++ b/qga/commands.c
@@ -402,7 +402,7 @@ GuestExec *qmp_guest_exec(const char *path,
     GIOChannel *in_ch, *out_ch, *err_ch;
     GSpawnFlags flags;
     bool has_output = (has_capture_output && capture_output);
-    uint8_t *input = NULL;
+    g_autofree uint8_t *input = NULL;
     size_t ninput = 0;
 
     arglist.value = (char *)path;
@@ -441,7 +441,7 @@ GuestExec *qmp_guest_exec(const char *path,
     g_child_watch_add(pid, guest_exec_child_watch, gei);
 
     if (has_input_data) {
-        gei->in.data = input;
+        gei->in.data = g_steal_pointer(&input);
         gei->in.size = ninput;
 #ifdef G_OS_WIN32
         in_ch = g_io_channel_win32_new_fd(in_fd);
-- 
2.25.1