ip6_gre: fix tunnel list corruption for x-netns

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[ Upstream commit ab5098fa25 ]

In changelink ops, the ip6gre_net pointer is retrieved from
dev_net(dev), which is wrong in case of x-netns. Thus, the tunnel is not
unlinked from its current list and is relinked into another net
namespace. This corrupts the tunnel lists and can later trigger a kernel
oops.

Fix this by retrieving the netns from device private area.

Fixes: c8632fc30b ("net: ip6_gre: Split up ip6gre_changelink()")
Cc: Petr Machata <petrm@mellanox.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Olivier Matz 2019-01-09 10:57:21 +01:00 • committed by Greg Kroah-Hartman

parent d2a4e0498d

commit 97521b30c1

1 changed files with 2 additions and 2 deletions

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net/ipv6/ip6_gre.c

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