netfilter: replace -EEXIST with -EBUSY

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[ Upstream commit 2bafeb8d2f ]

The -EEXIST error code is reserved by the module loading infrastructure
to indicate that a module is already loaded. When a module's init
function returns -EEXIST, userspace tools like kmod interpret this as
"module already loaded" and treat the operation as successful, returning
0 to the user even though the module initialization actually failed.

Replace -EEXIST with -EBUSY to ensure correct error reporting in the module
initialization path.

Affected modules:
  * ebtable_broute ebtable_filter ebtable_nat arptable_filter
  * ip6table_filter ip6table_mangle ip6table_nat ip6table_raw
  * ip6table_security iptable_filter iptable_mangle iptable_nat
  * iptable_raw iptable_security

Signed-off-by: Daniel Gomez <da.gomez@samsung.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Daniel Gomez 2025-12-19 06:13:20 +01:00 • committed by Greg Kroah-Hartman

parent e9aefab3b7

commit 67e06e8a77

3 changed files with 4 additions and 4 deletions

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2

net/bridge/netfilter/ebtables.c

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4

net/netfilter/nf_log.c

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2

net/netfilter/x_tables.c

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