net: enforce net sysctl registration

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Replace the warning and file permission change with an error when an
"unsafe" net sysctl registration is detected.

One of the barriers preventing the const qualification of the ctl_tables
in the net directory is the permission (->mode) change in
ensure_safe_net_sysctl. This prep commit removes that barrier and
ensures that the received ctl_table pointer to the net ctl_table
register function is const.

Signed-off-by: Joel Granados <joel.granados@kernel.org>
Link: https://patch.msgid.link/20260810-jag-net_const_qualify-v4-1-77e888237c69@kernel.org
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Joel Granados 2026-08-10 15:01:02 +02:00 • committed by Paolo Abeni

parent 68b3d4dbaf

commit ef6cb145e2

2 changed files with 15 additions and 13 deletions

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5

include/net/net_namespace.h

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23

net/sysctl_net.c

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