netfilter: conntrack: helper: Replace -EEXIST by -EBUSY

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The helper registration return value is passed-through by module_init
callbacks which modprobe confuses with the harmless -EEXIST returned
when trying to load an already loaded module.

Make sure modprobe fails so users notice their helper has not been
registered and won't work.

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Fixes: 12f7a50533 ("netfilter: add user-space connection tracking helper infrastructure")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>

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Phil Sutter 2025-08-18 13:22:20 +02:00 • committed by Florian Westphal

parent 479a54ab92

commit 54416fd767

1 changed files with 2 additions and 2 deletions

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net/netfilter/nf_conntrack_helper.c

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