fou: Don't allow 0 for FOU_ATTR_IPPROTO.

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fou_udp_recv() has the same problem mentioned in the previous
patch.

If FOU_ATTR_IPPROTO is set to 0, skb is not freed by
fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu().

Let's forbid 0 for FOU_ATTR_IPPROTO.

Fixes: 23461551c0 ("fou: Support for foo-over-udp RX path")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260115172533.693652-4-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Kuniyuki Iwashima 2026-01-15 17:24:48 +00:00 • committed by Jakub Kicinski

parent 68578370f9

commit 7a9bc9e3f4

2 changed files with 3 additions and 1 deletions

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2

Documentation/netlink/specs/fou.yaml

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2

net/ipv4/fou_nl.c

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