CVSROOT: /cvs
Module name: src
Changes by: chel...@cvs.openbsd.org 2023/09/08 21:03:45
Modified files:
sys/kern : kern_clockintr.c
Log message:
clockintr_dispatch: copy cl_func to cq_shadow.cl_func before calling it
When we add support for disestablishing clockintrs in the near future,
the current call to cl->cl_func will be in a race with free(9) on
another CPU. Copying cl_func to cq_shadow.cl_func before leaving the
mutex and then calling the copy eliminates the race.
Correcting the race has a negligible performance impact and simplifies
the forthcoming clockintr_disestablish() patch.
Requested by dlg@ back in March.
