Re: [PATCH RESEND v2 7/7] block/file-posix: fix a possible undefined behavior

[Laurent Vivier]

Le 23/10/2020 à 08:12, Chen Qun a écrit :
> From: Pan Nengyuan <pannengyuan@huawei.com>
> 
> local_err is not initialized to NULL, it will cause a assert error as below:
> qemu/util/error.c:59: error_setv: Assertion `*errp == NULL' failed.
> 
> Fixes: c6447510690
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
> Reviewed-by: Kevin Wolf <kwolf@redhat.com>
> Reviewed-by: Li Qiang <liq3ea@gmail.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> ---
>  block/file-posix.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/block/file-posix.c b/block/file-posix.c
> index c63926d592..b711124672 100644
> --- a/block/file-posix.c
> +++ b/block/file-posix.c
> @@ -2110,7 +2110,7 @@ static void raw_aio_attach_aio_context(BlockDriverState 
> *bs,
>  #endif
>  #ifdef CONFIG_LINUX_IO_URING
>      if (s->use_linux_io_uring) {
> -        Error *local_err;
> +        Error *local_err = NULL;
>          if (!aio_setup_linux_io_uring(new_context, &local_err)) {
>              error_reportf_err(local_err, "Unable to use linux io_uring, "
>                                           "falling back to thread pool: ");
> 

Applied to my trivial-patches branch.

Thanks,
Laurent