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| author |   Wei Wang <weiwan@google.com> | 2017-08-14 10:44:59 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-08-14 22:18:48 -0700 |
| commit | e5645f51ba99738b0e5d708edf9c6454f33b9310 (patch) | |
| tree | e9910540098f3c7aa709c7fd84e5e5a435ad29e9 /include/net/udp.h | |
| parent | af_key: do not use GFP_KERNEL in atomic contexts (diff) | |
| download | linux-dev-e5645f51ba99738b0e5d708edf9c6454f33b9310.tar.xz linux-dev-e5645f51ba99738b0e5d708edf9c6454f33b9310.zip | |
ipv6: release rt6->rt6i_idev properly during ifdown
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.stultz@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Tested-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/udp.h')
0 files changed, 0 insertions, 0 deletions