On Sat, Dec 26, 2020 at 05:13:08PM +0000, Taehee Yoo wrote:
> In the bareudp6_xmit_skb(), it calculates min_headroom.
> At that point, it uses struct iphdr, but it's not correct.
> So panic could occur.
> The struct ipv6hdr should be used.
>
> Test commands:
> ip netns add A
> ip netns add B
> ip link add veth0 type veth peer name veth1
> ip link set veth0 netns A
Missing "ip link set veth1 netns B", so the reproducer unfortunately
doesn't work.
BTW, you can also simplify the script by creating the veth devices
directly in the right netns:
ip link add name veth0 netns A type veth peer name veth1 netns B
Apart from that,
Acked-by: Guillaume Nault <gna...@redhat.com>
And thanks a lot for the reproducers!
> ip netns exec A ip link set veth0 up
> ip netns exec A ip a a 2001:db8:0::1/64 dev veth0
> ip netns exec B ip link set veth1 up
> ip netns exec B ip a a 2001:db8:0::2/64 dev veth1
>
> for i in {10..1}
> do
> let A=$i-1
> ip netns exec A ip link add bareudp$i type bareudp dstport $i \
> ethertype 0x86dd
> ip netns exec A ip link set bareudp$i up
> ip netns exec A ip -6 a a 2001:db8:$i::1/64 dev bareudp$i
> ip netns exec A ip -6 r a 2001:db8:$i::2 encap ip6 src \
> 2001:db8:$A::1 dst 2001:db8:$A::2 via 2001:db8:$i::2 \
> dev bareudp$i
>
> ip netns exec B ip link add bareudp$i type bareudp dstport $i \
> ethertype 0x86dd
> ip netns exec B ip link set bareudp$i up
> ip netns exec B ip -6 a a 2001:db8:$i::2/64 dev bareudp$i
> ip netns exec B ip -6 r a 2001:db8:$i::1 encap ip6 src \
> 2001:db8:$A::2 dst 2001:db8:$A::1 via 2001:db8:$i::1 \
> dev bareudp$i
> done
> ip netns exec A ping 2001:db8:7::2
