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| author | Alexey Gladkov <legion@kernel.org> | 2022-02-14 19:18:14 +0100 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2022-03-08 13:39:40 -0600 |
| commit | dc55e35f9e810f23dd69cfdc91a3d636023f57a2 (patch) | |
| tree | 66088dcec1207970b3dd880251eb334c3e7fca35 /ipc/namespace.c | |
| parent | ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2 (diff) | |
| download | linux-rpi-dc55e35f9e810f23dd69cfdc91a3d636023f57a2.tar.gz linux-rpi-dc55e35f9e810f23dd69cfdc91a3d636023f57a2.tar.bz2 linux-rpi-dc55e35f9e810f23dd69cfdc91a3d636023f57a2.zip | |
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. This poses a problem in the rootless containers.
To solve this I changed the implementation of the mqueue sysctls just
like some other sysctls.
So far, the changes do not provide additional access to files. This will
be done in a future patch.
v3:
* Don't implemenet set_permissions to keep the current behavior.
v2:
* Fixed compilation problem if CONFIG_POSIX_MQUEUE_SYSCTL is not
specified.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexey Gladkov <legion@kernel.org>
Link: https://lkml.kernel.org/r/b0ccbb2489119f1f20c737cf1930c3a9c4e4243a.1644862280.git.legion@kernel.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'ipc/namespace.c')
| -rw-r--r-- | ipc/namespace.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c index ae83f0f2651b..f760243ca685 100644 --- a/ipc/namespace.c +++ b/ipc/namespace.c @@ -59,6 +59,10 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns, if (err) goto fail_put; + err = -ENOMEM; + if (!setup_mq_sysctls(ns)) + goto fail_put; + sem_init_ns(ns); msg_init_ns(ns); shm_init_ns(ns); @@ -125,6 +129,8 @@ static void free_ipc_ns(struct ipc_namespace *ns) msg_exit_ns(ns); shm_exit_ns(ns); + retire_mq_sysctls(ns); + dec_ipc_namespaces(ns->ucounts); put_user_ns(ns->user_ns); ns_free_inum(&ns->ns); |