CVSROOT: /cvs
Module name: src
Changes by: bl...@cvs.openbsd.org 2018/07/09 02:46:30
Modified files:
sys/kern : kern_malloc.c
Log message:
Make free(9) MP safe. It was wrong to set ku_indx to 0 after freeing
the memory in uvm. Another process could use the false 0 then. To
be on the safe side, protect all access to ku_indx and ku_pagecnt
with a mutex. Update ku_indx and ku_pagecnt before calling
uvm_km_free(). Update ksp after uvm_km_free() to keep accounting
correct.
tested by sthen@; OK mpi@ visa@ deraadt@
