ipc: Store mqueue sysctls in the ipc namespace
Right now, the mqueue sysctls take ipc namespaces into account in a
rather hacky way. This works in most cases, but does not respect the
user namespace.
Within the user namespace, the user cannot change the /proc/sys/fs/mqueue/*
parametres.
To solve this I changed the implementation of the mqueue sysctls just
like the other sysctls.
Before changes:
$ echo 5 | unshare -r -U -i tee /proc/sys/fs/mqueue/msg_max
tee: /proc/sys/fs/mqueue/msg_max: Permission denied
5
After changes:
$ echo 5 | unshare -r -U -i tee /proc/sys/fs/mqueue/msg_max
5
Signed-off-by: Alexey Gladkov <legion@kernel.org>
4 files changed
