On 8/14/17 11:44 AM, Wei Wang wrote:
> From: Wei Wang <wei...@google.com>
>
> When a dst is created by addrconf_dst_alloc() for a host route or an
> anycast route, dst->dev points to loopback dev while rt6->rt6i_idev
> points to a real device.
> When the real device goes down, the current cleanup code only checks for
> dst->dev and assumes rt6->rt6i_idev->dev is the same. This causes the
> refcount leak on the real device in the above situation.
> This patch makes sure to always release the refcount taken on
> rt6->rt6i_idev during dst_dev_put().
>
> Fixes: 587fea741134 ("ipv6: mark DST_NOGC and remove the operation of
> dst_free()")
> Reported-by: John Stultz <john.stu...@linaro.org>
> Tested-by: John Stultz <john.stu...@linaro.org>
> Tested-by: Martin KaFai Lau <ka...@fb.com>
> Signed-off-by: Wei Wang <wei...@google.com>
> Signed-off-by: Martin KaFai Lau <ka...@fb.com>
> ---
> net/ipv6/route.c | 13 +++++--------
> 1 file changed, 5 insertions(+), 8 deletions(-)
Acked-by: David Ahern <dsah...@gmail.com>
