linux/kernel/user_namespace.c, branch v6.19

ns: move ns type into struct ns_common

2025-09-25T07:23:54Z

It's misplaced in struct proc_ns_operations and ns->ops might be NULL if the namespace is compiled out but we still want to know the type of the namespace for the initial namespace struct. Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

ns: simplify ns_common_init() further

2025-09-22T12:47:10Z

Simply derive the ns operations from the namespace type. Acked-by: Thomas Gleixner Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

user: port to ns_ref_*() helpers

2025-09-19T14:22:37Z

Stop accessing ns.count directly. Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

ns: add ns_common_free()

2025-09-19T14:22:36Z

And drop ns_free_inum(). Anything common that can be wasted centrally should be wasted in the new common helper. Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

nscommon: simplify initialization

2025-09-19T12:26:19Z

There's a lot of information that namespace implementers don't need to know about at all. Encapsulate this all in the initialization helper. Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

ns: add to__ns() to respective headers

2025-09-19T12:26:16Z

Every namespace type has a container_of(ns, , ns) static inline function that is currently not exposed in the header. So we have a bunch of places that open-code it via container_of(). Move it to the headers so we can use it directly. Reviewed-by: Aleksa Sarai Signed-off-by: Christian Brauner

user: support ns lookup

2025-09-19T12:26:15Z

Support the generic ns lookup infrastructure to support file handles for namespaces. Signed-off-by: Christian Brauner

user: use ns_common_init()

2025-09-19T12:26:13Z

Don't cargo-cult the same thing over and over. Reviewed-by: Jan Kara Signed-off-by: Christian Brauner

uidgid: add map_id_range_up()

2025-02-12T11:12:27Z

Add map_id_range_up() to verify that the full kernel id range can be mapped up in a given idmapping. This will be used in follow-up patches. Link: https://lore.kernel.org/r/20250204-work-mnt_idmap-statmount-v2-1-007720f39f2e@kernel.org Reviewed-by: Jeff Layton Signed-off-by: Christian Brauner

user_namespace: use kmemdup_array() instead of kmemdup() for multiple allocation

2024-09-09T23:47:42Z

Let the kmemdup_array() take care about multiplication and possible overflows. Link: https://lkml.kernel.org/r/20240828072340.1249310-1-ruanjinjie@huawei.com Signed-off-by: Jinjie Ruan Reviewed-by: Kees Cook Cc: Alexey Dobriyan Cc: Christian Brauner Cc: Li zeming Cc: Randy Dunlap Signed-off-by: Andrew Morton