diff options
| author | Bill Wendling <morbo@google.com> | 2026-09-08 22:27:30 +0000 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-09-09 09:45:01 +0200 |
| commit | f6f1a2496ba5dcc076d7fb7aa329887cd6ae55fa (patch) | |
| tree | 7fc226bb2f249a4f225e06a03782d3d8dfc00475 /include/linux | |
| parent | b31397fe3007a9fc636fcc34fcdc2b1e69d46804 (diff) | |
| download | linux-next-f6f1a2496ba5dcc076d7fb7aa329887cd6ae55fa.tar.gz linux-next-f6f1a2496ba5dcc076d7fb7aa329887cd6ae55fa.zip | |
userns: Add KUnit test suite for uid_gid_map
Add a KUnit test suite to verify the insertion and sorting of mappings
in struct uid_gid_map. This test suite validates both base extent
insertion (<= 5 mappings) and extended extent insertion (> 5 mappings,
which triggers the allocation of the forward and reverse pointers).
This is especially useful for verifying that the __counted_by_ptr
attribute added to 'forward' and 'reverse' pointers works correctly
without causing any runtime bounds-checking panics or traps.
Signed-off-by: Bill Wendling <morbo@google.com>
Link: https://patch.msgid.link/20260908222734.3048684-2-morbo@google.com
Tested-by: Bradley Morgan <brads@mainlining.org>
Reviewed-by: Bradley Morgan <brads@mainlining.org>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/user_namespace.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h index 2962256eddf7..633157781edc 100644 --- a/include/linux/user_namespace.h +++ b/include/linux/user_namespace.h @@ -207,6 +207,12 @@ extern bool in_userns(const struct user_namespace *ancestor, const struct user_namespace *child); extern bool current_in_userns(const struct user_namespace *target_ns); struct ns_common *ns_get_owner(struct ns_common *ns); + +#if IS_ENABLED(CONFIG_USER_NS_MAP_KUNIT_TEST) +extern int insert_extent(struct uid_gid_map *map, struct uid_gid_extent *extent); +extern int sort_idmaps(struct uid_gid_map *map); +#endif /* CONFIG_USER_NS_MAP_KUNIT_TEST */ + #else static inline struct user_namespace *get_user_ns(struct user_namespace *ns) |