[PATCH v3 0/3] Allow to change ipc/mq sysctls inside ipc namespace

From: Alexey Gladkov
Date: Wed Sep 21 2022 - 06:42:23 EST


Right now ipc and mq limits count as per ipc namespace, but only real
root can change them. By default, the current values of these limits are
such that it can only be reduced. Since only root can change the values,
it is impossible to reduce these limits in the rootless container.

We can allow limit changes within ipc namespace because mq parameters
are limited by RLIMIT_MSGQUEUE and ipc parameters are not limited to
anything other than cgroups.

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Alexey Gladkov (3):
sysctl: Allow change system v ipc sysctls inside ipc namespace
sysctl: Allow to change limits for posix messages queues
docs: Add information about ipc sysctls limitations

Documentation/admin-guide/sysctl/kernel.rst | 14 ++++++--
ipc/ipc_sysctl.c | 36 +++++++++++++++++++--
ipc/mq_sysctl.c | 36 +++++++++++++++++++++
3 files changed, 81 insertions(+), 5 deletions(-)

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2.33.4