kfence_handle_page_fault(9)

🌸 kfence_handle_page_fault(9) 🌸

okay so bestie, this is kfence_handle_page_fault(9) from the Kernel API Manual (section 9), and it's literally the page-fault handling icon for KFENCE pages. no cap. 💅

✨ NAME ✨

kfence_handle_page_fault — perform page fault handling for KFENCE pages 🫶

📞 SYNOPSIS 📞

this is the exact signature, character for character, don't @ me:

bool kfence_handle_page_fault (unsigned long addr , bool is_write ,
       struct pt_regs *regs );

🫶 ARGUMENTS 🫶

• addr — faulting address. literally the address that faulted.
• is_write — is access a write? yep, the write-vs-not vibe check.
• regs — current struct pt_regs (can be NULL, but shows full stack trace) 🫶

🔥 RETURN 🔥

• false — address outside KFENCE pool,
• true — page fault handled by KFENCE, no additional handling required.

💀 DESCRIPTION 💀

so a page fault inside KFENCE pool is giving memory error: think out-of-bounds access, use-after-free, or invalid memory access. in these cases KFENCE prints an error message and marks the offending page as present, so that the kernel can proceed. periodt. 💅

👀 SEE ALSO 👀

Kernel file ./include/linux/kfence.h is the home base, and the SEE ALSO besties are:

• is_kfence_address(9)
• kfence_alloc_pool_and_metadata(9)
• kfence_init(9)
• kfence_shutdown_cache(9)
• kfence_alloc(9)
• kfence_ksize(9)
• kfence_object_start(9)
• __kfence_free(9)
• kfence_free(9)
• __kfence_obj_info(9)

okay that's the whole page, bestie 🫶 — source/version: ./include/linux, date: October 2026, and the page is kfence_handle_page_fault(9). mwah 💋