netdev - Re: [bug report] genetlink: fix error return code in genl_register

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Date:   Wed, 9 Nov 2016 14:43:34 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     weiyongjun1@...wei.com, kernel-janitors@...r.kernel.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [bug report] genetlink: fix error return code in genl_register_family()

Cc'ing netdev

On Wed, Nov 9, 2016 at 1:56 AM, Dan Carpenter <dan.carpenter@...cle.com> wrote:
> Hello Wei Yongjun,
>
> The patch 22ca904ad70a: "genetlink: fix error return code in
> genl_register_family()" from Nov 1, 2016, leads to the following
> static checker warning:
>
>         net/netlink/genetlink.c:365 genl_register_family()
>         warn: unsigned 'family->id' is never less than zero.
>
> net/netlink/genetlink.c
>    362
>    363          family->id = idr_alloc(&genl_fam_idr, family,
>    364                                 start, end + 1, GFP_KERNEL);
>    365          if (family->id < 0) {
>                     ^^^^^^^^^^^^^^
> Doesn't work for unsigned int.


family->id should be signed int.