Re: [Qemu-devel] [PATCH v2] spice-char: fix segfault in char_spice_finalize

[Marc-André Lureau]

Hi

----- Original Message -----
> In 'qemu_chr_open_spice_vmc' if the 'psubtype' is NULL, it will
> call 'char_spice_finalize'. But as the SpiceChardev is not inserted
> in the 'spice_chars' list, the 'QLIST_REMOVE' will cause a segfault.
> Add a detect to avoid it.
> 
> Signed-off-by: Li Qiang <address@hidden>

Reviewed-by: Marc-André Lureau <address@hidden>

> ---
>  spice-qemu-char.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/spice-qemu-char.c b/spice-qemu-char.c
> index 6f46f46..4d1c76e 100644
> --- a/spice-qemu-char.c
> +++ b/spice-qemu-char.c
> @@ -215,7 +215,10 @@ static void char_spice_finalize(Object *obj)
>      SpiceChardev *s = SPICE_CHARDEV(obj);
>  
>      vmc_unregister_interface(s);
> -    QLIST_REMOVE(s, next);
> +
> +    if (s->next.le_prev) {
> +        QLIST_REMOVE(s, next);
> +    }
>  
>      g_free((char *)s->sin.subtype);
>  #if SPICE_SERVER_VERSION >= 0x000c02
> --
> 1.8.3.1
> 
>