test_kuid_ro...ent_mappings(9)

okay bestie, you’re looking at the Kernel API Manual page for test_kuid_ro...ent_mappings(9) — yes, that title is literally truncated like that, we’re keeping it 💅

✨ NAME ✨

test_kuid_root_in_ns_with_different_mappings — Test with multiple namespaces

🦋 SYNOPSIS 🦋

void test_kuid_root_in_ns_with_different_mappings (struct kunit *test );

🎀 ARGUMENTS 🎀

• test — KUnit test context

💖 DESCRIPTION 💖

This one creates multiple user namespaces with different UID mappings, and the whole point is to verify that kuid_root_in_ns correctly distinguishes between namespaces. no cap, that’s the vibe check 🔥

Each namespace maps uid 0 to a different kuid, and we verify that each kuid only owns its corresponding namespace — plus kuid 0 owns all via the init_user_ns parent. periodt 💅

🌈 SEE ALSO 🌈

• Kernel file: ./security/commoncap_test.c
• test_vfsuid_root_in_currentns_init_ns(9)
• test_vfsuid_root_in_currentns_invalid(9)
• test_vfsuid_root_in_currentns_nonzero(9)
• test_kuid_root_in_ns_init_ns_uid0(9)
• test_kuid_root_in_ns_init_ns_nonzero(9)
• create_test_user_ns_with_mapping(9)
• test_kuid_root_in_ns_with_mapping(9)

made with 💜 from ./security, stamped October 2026, page test_kuid_ro...ent_mappings(9) — k bye bestie 🫶✨