On Thu, 29 Oct 2015 12:15:47 +0100
Phil Sutter <p...@nwl.cc> wrote:

> This patch is based upon an old Fedora bug[1] regarding the routing
> setup of PPP links. I'm not quite sure if it still applies today or how
> to trigger it, but looking at the change introducing this, it's
> obviously a bug.
> 
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=622782
> 
> Fixes: 4479282 ("iproute2: filter routing entries based on clone flag")
> Signed-off-by: Phil Sutter <p...@nwl.cc>
> ---
>  ip/iproute.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/ip/iproute.c b/ip/iproute.c
> index eab512d..ea7e9aa 100644
> --- a/ip/iproute.c
> +++ b/ip/iproute.c
> @@ -151,7 +151,7 @@ static int filter_nlmsg(struct nlmsghdr *n, struct rtattr 
> **tb, int host_len)
>       if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
>               ip6_multiple_tables = 1;
>  
> -     if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
> +     if (filter.cloned && !(r->rtm_flags&RTM_F_CLONED))
>               return 0;
>  
>       if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {

Holding off on this, until there is an obvious reproduction.
The patch looks right but this code has been around a long time and don't want
any surprised users.
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