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Jérémy Jean
c71d33e31b
On network namespace exit, loopback is freed before MPLS unregisters its
sysctls. A task can keep platform_labels open and write to it during exit.
The handler can then use the freed loopback device.
Unregister the sysctls in pre_exit.
Cc: stable+noautosel@kernel.org # LLM report + LLM fix, not seen in real life
Fixes: 7720c01f3f ("mpls: Add a sysctl to control the size of the mpls label table")
Signed-off-by: Jérémy Jean <Jeremy.Jean@oss.cyber.gouv.fr>
Link: https://patch.msgid.link/20261007201237.171863-2-Jeremy.Jean@oss.cyber.gouv.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>