ip_tunnel: Clamp MTU to bounds on new link

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Otherwise, it's possible to specify invalid MTU values directly
on creation of a link (via 'ip link add'). This is already
prevented on subsequent MTU changes by commit b96f9afee4
("ipv4/6: use core net MTU range checking").

Fixes: c544193214 ("GRE: Refactor GRE tunneling code.")
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 17:16:28 +01:00 • committed by Steffen Klassert

parent dd1df24737

commit 24fc79798b

1 changed files with 7 additions and 1 deletions

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net/ipv4/ip_tunnel.c

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