memdup_array_user(9)

🎀 NAME 🎀

okay so bestie, we are in the Kernel API Manual, and the icon, the moment, the whole entire main character is memdup_array_user — duplicate array from user space. No cap, that’s the name and that’s the job. 💅✨

✨ SYNOPSIS ✨

        void * memdup_array_user (const void __user *src , size_t n , size_t
       size );

🫶 ARGUMENTS 🫶

the way that these three are literally just doing their little jobs, one by one, and we love them for it:

• src — source address in user space 🌍
• n — number of array members to copy 🔢
• size — size of one array member 📏

💖 RETURN 💖

if things go sideways, you get an ERR_PTR on failure. and listen, the result is physically contiguous, to be freed by kfree. so yeah, that kfree cleanup arc is mandatory, bestie — don’t leave it hanging. 🧹💀

🦋 SEE ALSO 🦋

the page points at the Kernel file ./include/linux/string.h plus this whole SEE ALSO friend group, and yes they all get their exact little names because we do not abbreviate the squad:

• Kernel file ./include/linux/string.h
• vmemdup_array_user(9)
• strscpy(9)
• strscpy_pad(9)
• mem_is_zero(9)
• sysfs_match_string(9)
• memzero_explicit(9)
• kbasename(9)
• strtomem_pad(9)
• strtomem(9)
• memtostr(9)
• memtostr_pad(9)
• memset_after(9)
• memset_startat(9)
• str_has_prefix(9)
• strstarts(9)
• strends(9)

mwah 💋 this page’s footer tea is source/version ./include/linux, dated October 2026, and that’s the cute little sign-off, periodt. 🎀✨