hw/loader: Use g_autofree in unpack_efi_zboot_image()

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Daan De Meyer <daan.j.demeyer@gmail.com>
Message-ID: <20251124123521.1058183-4-daan.j.demeyer@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/core/loader.c

@@ -898,7 +898,7 @@ ssize_t unpack_efi_zboot_image(uint8_t **buffer, ssize_t *size)
 {
     const size_t max_bytes = LOAD_IMAGE_MAX_DECOMPRESSED_BYTES;
     const struct linux_efi_zboot_header *header;
-    uint8_t *data = NULL;
+    g_autofree uint8_t *data = NULL;
     ssize_t ploff, plsize;
     ssize_t bytes;
 
@@ -936,12 +936,11 @@ ssize_t unpack_efi_zboot_image(uint8_t **buffer, ssize_t *size)
     bytes = gunzip(data, max_bytes, *buffer + ploff, plsize);
     if (bytes < 0) {
         fprintf(stderr, "failed to decompress EFI zboot image\n");
-        g_free(data);
         return -1;
     }
 
     g_free(*buffer);
-    *buffer = g_realloc(data, bytes);
+    *buffer = g_realloc(g_steal_pointer(&data), bytes);
     *size = bytes;
     return bytes;
 }