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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-02-27 16:07:43 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-02 12:43:47 -0800 |
| commit | e3330039ea28dc199e3b2da993895ff742a91adf (patch) | |
| tree | e2755e80b6742c3f4b8a82464210f52c87b20e65 /net/6lowpan | |
| parent | 48cac18ecf1de82f76259a54402c3adb7839ad01 (diff) | |
| download | linux-e3330039ea28dc199e3b2da993895ff742a91adf.tar.gz linux-e3330039ea28dc199e3b2da993895ff742a91adf.tar.xz | |
ipv6: check for ip6_null_entry in __ip6_del_rt_siblings()
Andrey reported a NULL pointer deref bug in ipv6_route_ioctl()
-> ip6_route_del() -> __ip6_del_rt_siblings() code path. This is
because ip6_null_entry is returned in this path since ip6_null_entry
is kinda default for a ipv6 route table root node. Quote from
David Ahern:
ip6_null_entry is the root of all ipv6 fib tables making it integrated
into the table ...
We should ignore any attempt of trying to delete it, like we do in
__ip6_del_rt() path and several others.
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Fixes: 0ae8133586ad ("net: ipv6: Allow shorthand delete of all nexthops in multipath route")
Cc: David Ahern <dsa@cumulusnetworks.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/6lowpan')
0 files changed, 0 insertions, 0 deletions