Issue
If I alloc one memory use vzalloc() interface (kernel v4.9), but free it use kfree(), what will happen in kernel? Can I free this memory?
I watch my code, and see this trouble, but I do not what will happen if touch this problem, so ask others for help.
Solution
The documentation for kfree() says:
Don’t free memory not originally allocated by
kmalloc()or you will run into trouble.
If you violate the restriction the behavior is undefined. If you're lucky the kernel will crash; if you're unlucky you might silently corrupt something and cause unspecified future weirdness.
To free memory allocated by vzalloc(), use vfree() or kvfree().
Answered By - John Kugelman Answer Checked By - Senaida (WPSolving Volunteer)