[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 10 Oct 2017 11:38:20 -0700
From: Wei Wang <tracywwnj@...il.com>
To: Colin King <colin.king@...onical.com>
Cc: "David S . Miller" <davem@...emloft.net>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Linux Kernel Network Developers <netdev@...r.kernel.org>,
kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][V2] ipv6: fix incorrect bitwise operator used on rt6i_flags
On Tue, Oct 10, 2017 at 11:10 AM, Colin King <colin.king@...onical.com> wrote:
> From: Colin Ian King <colin.king@...onical.com>
>
> The use of the | operator always leads to true which looks rather
> suspect to me. Fix this by using & instead to just check the
> RTF_CACHE entry bit.
>
> Detected by CoverityScan, CID#1457734, #1457747 ("Wrong operator used")
>
> Fixes: 35732d01fe31 ("ipv6: introduce a hash table to store dst cache")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
Acked-by: Wei Wang <weiwan@...gle.com>
> net/ipv6/route.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/net/ipv6/route.c b/net/ipv6/route.c
> index 6db1541eaa7b..dd9ba1192dbc 100644
> --- a/net/ipv6/route.c
> +++ b/net/ipv6/route.c
> @@ -1425,7 +1425,7 @@ int rt6_remove_exception_rt(struct rt6_info *rt)
> int err;
>
> if (!from ||
> - !(rt->rt6i_flags | RTF_CACHE))
> + !(rt->rt6i_flags & RTF_CACHE))
> return -EINVAL;
>
> if (!rcu_access_pointer(from->rt6i_exception_bucket))
> @@ -1469,7 +1469,7 @@ static void rt6_update_exception_stamp_rt(struct rt6_info *rt)
> struct rt6_exception *rt6_ex;
>
> if (!from ||
> - !(rt->rt6i_flags | RTF_CACHE))
> + !(rt->rt6i_flags & RTF_CACHE))
> return;
>
> rcu_read_lock();
> --
> 2.14.1
>
Powered by blists - more mailing lists