linux.git/kernel/user_namespace.c, branch v6.18.21 Clone of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git ns: move ns type into struct ns_common 2025-09-25T07:23:54+00:00 Christian Brauner brauner@kernel.org 2025-09-24T11:33:59+00:00 4055526d35746ce8b04bfa5e14e14f28bb163186 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 <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
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 <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
ns: simplify ns_common_init() further 2025-09-22T12:47:10+00:00 Christian Brauner brauner@kernel.org 2025-09-22T12:42:36+00:00 d7610cb7454bbd8bf6d58f71b0ed57155d3c545f Simply derive the ns operations from the namespace type. Acked-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
Simply derive the ns operations from the namespace type.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
user: port to ns_ref_*() helpers 2025-09-19T14:22:37+00:00 Christian Brauner brauner@kernel.org 2025-09-18T10:11:52+00:00 96d997ea5ad1911cc393ffdb5c928b532f2f921a Stop accessing ns.count directly. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
Stop accessing ns.count directly.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
ns: add ns_common_free() 2025-09-19T14:22:36+00:00 Christian Brauner brauner@kernel.org 2025-09-17T10:28:08+00:00 be5f21d3985f00827e09b798f7a07ebd6dd7f54a And drop ns_free_inum(). Anything common that can be wasted centrally should be wasted in the new common helper. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
And drop ns_free_inum(). Anything common that can be wasted centrally
should be wasted in the new common helper.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
nscommon: simplify initialization 2025-09-19T12:26:19+00:00 Christian Brauner brauner@kernel.org 2025-09-17T10:28:07+00:00 5612ff3ec588be09f11a9424db6d1186bcdeb3fa 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 <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
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 <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
ns: add to_<type>_ns() to respective headers 2025-09-19T12:26:16+00:00 Christian Brauner brauner@kernel.org 2025-09-12T11:52:49+00:00 d7afdf889561058068ab46fd8f306c70ef29216a Every namespace type has a container_of(ns, <ns_type>, 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 <cyphar@cyphar.com> Signed-off-by: Christian Brauner <brauner@kernel.org> 
Every namespace type has a container_of(ns, <ns_type>, 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 <cyphar@cyphar.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
user: support ns lookup 2025-09-19T12:26:15+00:00 Christian Brauner brauner@kernel.org 2025-09-12T11:52:47+00:00 2f5243cbba6cff66cc8b43bdc14853282f5b1e67 Support the generic ns lookup infrastructure to support file handles for namespaces. Signed-off-by: Christian Brauner <brauner@kernel.org> 
Support the generic ns lookup infrastructure to support file handles for
namespaces.

Signed-off-by: Christian Brauner <brauner@kernel.org>
user: use ns_common_init() 2025-09-19T12:26:13+00:00 Christian Brauner brauner@kernel.org 2025-09-12T11:52:37+00:00 00ed42285c46e2c84223e3ec5e1d07638948b4d1 Don't cargo-cult the same thing over and over. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org> 
Don't cargo-cult the same thing over and over.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
uidgid: add map_id_range_up() 2025-02-12T11:12:27+00:00 Christian Brauner brauner@kernel.org 2025-02-04T11:27:46+00:00 784ed4354c9077501b3a9236bafea23e5b878703 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 <jlayton@kernel.org> Signed-off-by: Christian Brauner <brauner@kernel.org> 
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 <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
user_namespace: use kmemdup_array() instead of kmemdup() for multiple allocation 2024-09-09T23:47:42+00:00 Jinjie Ruan ruanjinjie@huawei.com 2024-08-28T07:23:40+00:00 546f02823df82cddc411e8db236d296a51308dfa 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 <ruanjinjie@huawei.com> Reviewed-by: Kees Cook <kees@kernel.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Christian Brauner <brauner@kernel.org> Cc: Li zeming <zeming@nfschina.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> 
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 <ruanjinjie@huawei.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Li zeming <zeming@nfschina.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>