Kuniyuki Iwashima c246bfbb35 phonet: Handle error of rtnl_register_module(). ...

[ Upstream commit b5e837c86041bef60f36cf9f20a641a30764379a ]

Before commit addf9b90de ("net: rtnetlink: use rcu to free rtnl
message handlers"), once the first rtnl_register_module() allocated
rtnl_msg_handlers[PF_PHONET], the following calls never failed.

However, after the commit, rtnl_register_module() could fail silently
to allocate rtnl_msg_handlers[PF_PHONET][msgtype] and requires error
handling for each call.

Handling the error allows users to view a module as an all-or-nothing
thing in terms of the rtnetlink functionality.  This prevents syzkaller
from reporting spurious errors from its tests, where OOM often occurs
and module is automatically loaded.

Let's use rtnl_register_many() to handle the errors easily.

Fixes: addf9b90de ("net: rtnetlink: use rcu to free rtnl message handlers")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Rémi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-10-17 15:24:30 +02:00

..

af_phonet.c

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datagram.c

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Kconfig

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Makefile

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pep-gprs.c

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pep.c

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pn_dev.c

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pn_netlink.c

phonet: Handle error of rtnl_register_module().

2024-10-17 15:24:30 +02:00

socket.c

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sysctl.c

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