vti6: Fix dev->max_mtu setting

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We shouldn't allow a tunnel to have IP_MAX_MTU as MTU, because
another IPv6 header is going on top of our packets. Without this
patch, we might end up building packets bigger than IP_MAX_MTU.

Fixes: b96f9afee4 ("ipv4/6: use core net MTU range checking")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Acked-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

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Stefano Brivio 2018-03-15 17:17:13 +01:00 • committed by Steffen Klassert

parent 7a67e69a33

commit f8a554b4aa

1 changed files with 1 additions and 1 deletions

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net/ipv6/ip6_vti.c

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