net: vrf: Reset rt6i_idev in local dst after put

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[ Upstream commit 3dc857f0e8 ]

The VRF driver takes a reference to the inet6_dev on the VRF device for
its rt6_local dst when handling local traffic through the VRF device as
a loopback. When the device is deleted the driver does a put on the idev
but does not reset rt6i_idev in the rt6_info struct. When the dst is
destroyed, dst_destroy calls ip6_dst_destroy which does a second put for
what is essentially the same reference causing it to be prematurely freed.
Reset rt6i_idev after the put in the vrf driver.

Fixes: b4869aa2f8 ("net: vrf: ipv6 support for local traffic to
                       local addresses")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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David Ahern 2017-03-17 16:07:11 -07:00 • committed by Greg Kroah-Hartman

parent 4b9b7f17ba

commit 4e7c821b68

1 changed files with 3 additions and 1 deletions

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drivers/net/vrf.c

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