CVSROOT: /cvs
Module name: src
Changes by: v...@cvs.openbsd.org 2023/07/06 04:16:58
Modified files:
sys/dev/wscons : wsevent.c
Log message:
Clear knotes when finishing wseventvar
When finishing a wseventvar in wsevent_fini(), clear the klist.
Otherwise knotes can be left dangling, which can crash the kernel.
In general, klist_invalidate() should happen after vdevgone() in order
to avoid a race with kevent registration. However, the current wscons
drivers clear the wsevent pointer (sc->sc_base.me_evp) before calling
wsevent_fini(). This prevents the drivers from registering new kevents.
Prompted by a report by Peter J. Philipp on bugs@
OK mvs@ miod@
