New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

bug?: kfree the same page twice #191

Open

qin-you opened this issue Jul 6, 2023 · 0 comments

qin-you commented Jul 6, 2023

in kernel/proc.c freeproc() function :

kfree((void*)p->trapframe);                                  // first
proc_freepagetable(p->pagetable, p->sz);
         uvmunmap(pagetable, TRAPFRAME, 1, 0);
                     kfree((void*)pa);                                // second

kfree will not give up this duplicated page, and this could lead to some problems. I delete the first kfree above and the code works well.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment