elf_validit...dex_versions(9)

✨ elf_validity_cache_index_versions — the Kernel API Manual files ✨

okay so bestie, this page is elf_validit...dex_versions(9) and it lives in the Kernel API Manual (yes the title is literally squished with an ellipsis, we love a truncated icon 💅). She's got a long name in the NAME section and honestly she earns it. Buckle up 🎀

🌸 NAME 🌸

elf_validity_cache_index_versions — validate those version indices and then cache them, periodt. Validation girlie AND storage girlie, we contain multitudes ✨

🦋 SYNOPSIS 🦋

int elf_validity_cache_index_versions (struct load_info *info , int
flags );

💖 ARGUMENTS 💖

• info — the load info you're caching version indices into, bestie. Heads up tho: it must already have load_info->sechdrs and load_info->secstrings populated. No populating, no slay 😭
• flags — the load flags. These are the relevant ones for suppressing version loading — go peek at uapi/linux/module.h for the deets, iykyk 👑

🌈 DESCRIPTION 🌈

okay so here's the vibe check 🫶 If we're straight-up ignoring modversions because of the flags, then we zero out all the version indices and just return validity. Done, iconic, no notes 💀

Othewrise — and yes we're checking, lowkey thorough — she verifies these two things:

• If "__version_ext_crcs" is present, then "__version_ext_names" is present too. Like, they come as a set, no leaving your bestie behind 💜
• There is a name present for every crc. Every single one. No stragglers, no cap ⭐

Then, if present, she populates:

• load_info->index.vers
• load_info->index.vers_ext_crc
• load_info->index.vers_ext_names

that's the whole cache-and-go, main character energy fr fr 🔥

🍓 RETURN 🍓

• 0 if it's valid — slay ✨
• -ENOEXEC on failure — not slay 😭

🧚 SEE ALSO 🧚

so many siblings, this girl has a whole friend group 🎀

• Kernel file ./kernel/module/main.c
• find_any_unique_sec(9)
• is_module_percpu_address(9)
• module_refcount(9)
• verify_module_namespace(9)
• elf_validity_ehdr(9)
• elf_validity_cache_sechdrs(9)
• elf_validity_cache_secstrings(9)
• elf_validity_cache_index_info(9)
• elf_validity_cache_index_mod(9)
• elf_validity_cache_index_sym(9)
• elf_validity_cache_index_str(9)
• elf_validity_cache_index(9)
• elf_validity_cache_strtab(9)
• is_module_address(9)
• __module_address(9)
• is_module_text_address(9)
• __module_text_address(9)

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ngl bestie, do not call this one before load_info->sechdrs and load_info->secstrings are populated. That's the one requirement, don't break her heart 🙈

💜 sign-off time: this page ships from ./kernel/module and it's dated October 2026. Consider yourself thoroughly informed, bestie — go be valid ✨👑🌸