Re: [PATCH] vl: fix memory leak in configure_accelerators

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 1/8/20 12:42 PM, kuhn.chenqun@huawei.com wrote:
> From: Chen Qun <kuhn.chenqun@huawei.com>
> 
> The accel_list forgot to free, the asan output:
> 
> Direct leak of 16 byte(s) in 1 object(s) allocated from:
>      #0 0xffff919331cb in __interceptor_malloc (/lib64/libasan.so.4+0xd31cb)
>      #1 0xffff913f7163 in g_malloc (/lib64/libglib-2.0.so.0+0x57163)
>      #2 0xffff91413d9b in g_strsplit (/lib64/libglib-2.0.so.0+0x73d9b)
>      #3 0xaaab42fb58e7 in configure_accelerators /qemu/vl.c:2777
>      #4 0xaaab42fb58e7 in main /qemu/vl.c:4121
>      #5 0xffff8f9b0b9f in __libc_start_main (/lib64/libc.so.6+0x20b9f)
>      #6 0xaaab42fc1dab  (/qemu/build/aarch64-softmmu/qemu-system-aarch64+0x8b1dab)
> 
> Indirect leak of 4 byte(s) in 1 object(s) allocated from:
>      #0 0xffff919331cb in __interceptor_malloc (/lib64/libasan.so.4+0xd31cb)
>      #1 0xffff913f7163 in g_malloc (/lib64/libglib-2.0.so.0+0x57163)
>      #2 0xffff9141243b in g_strdup (/lib64/libglib-2.0.so.0+0x7243b)
>      #3 0xffff91413e6f in g_strsplit (/lib64/libglib-2.0.so.0+0x73e6f)
>      #4 0xaaab42fb58e7 in configure_accelerators /qemu/vl.c:2777
>      #5 0xaaab42fb58e7 in main /qemu/vl.c:4121
>      #6 0xffff8f9b0b9f in __libc_start_main (/lib64/libc.so.6+0x20b9f)
>      #7 0xaaab42fc1dab  (/qemu/build/aarch64-softmmu/qemu-system-aarch64+0x8b1dab)
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
>   vl.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/vl.c b/vl.c
> index 86474a55c9..035a24e52b 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2788,6 +2788,7 @@ static void configure_accelerators(const char *progname)
>                   error_report("invalid accelerator %s", *tmp);
>               }
>           }
> +        g_strfreev(accel_list);
>       } else {
>           if (accel != NULL) {
>               error_report("The -accel and \"-machine accel=\" options are incompatible");
>