Re: [PATCH] hw/clx: Fix CFMW config memory leak

[Jonathan Cameron via <qemu-devel@nongnu.org>]

On Mon, 29 May 2023 15:59:56 +0800
Li Zhijian <lizhijian@cn.fujitsu.com> wrote:

> Only 'fw' pointer is marked as g_autofree, so we shoud free other
> resource manually in error path.
> 
Good spot.

Patch title typo
hw/cxl: 

It's a bit annoying we can't handle this with more autofree magic.
That would work for fw->targets but not for the string duplicates.

One other comment inline,

Thanks,

Jonathan


> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
> ---
>  hw/cxl/cxl-host.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c
> index 034c7805b3e..dd1a7c83f71 100644
> --- a/hw/cxl/cxl-host.c
> +++ b/hw/cxl/cxl-host.c
> @@ -48,7 +48,7 @@ static void cxl_fixed_memory_window_config(CXLState *cxl_state,
>      if (object->size % (256 * MiB)) {
>          error_setg(errp,
>                     "Size of a CXL fixed memory window must be a multiple of 256MiB");
> -        return;
> +        goto err_free;


>      }
>      fw->size = object->size;
>  
> @@ -57,7 +57,7 @@ static void cxl_fixed_memory_window_config(CXLState *cxl_state,
>              cxl_interleave_granularity_enc(object->interleave_granularity,
>                                             errp);
>          if (*errp) {
> -            return;
> +            goto err_free;
>          }
>      } else {
>          /* Default to 256 byte interleave */
> @@ -68,6 +68,12 @@ static void cxl_fixed_memory_window_config(CXLState *cxl_state,
>                                               g_steal_pointer(&fw));
>  
>      return;
> +
> +err_free:
> +    for (i = 0; i < fw->num_targets && fw->targets[i]; i++) {

No need to check fw->targets[i]

> +        g_free(fw->targets[i]);
> +    }
> +    g_free(fw->targets);
>  }
>  
>  void cxl_fmws_link_targets(CXLState *cxl_state, Error **errp)