BSDSec

deadsimple BSD Security Advisories and Announcements

uvm errata for 5.7 and 5.8

Earlier this month, kettenis identified a bug in uvm from an incompletely
reverted change. Clearing the wrong bit on a page would sometimes result in
the page queues being corrupted, and then eventually the system would crash or
panic.

This issue affects 5.7 and the forthcoming 5.8 release.

Patches are available. Apply the patch, rebuild the kernel, and reboot.

5.7:
http://ftp.openbsd.org/pub/OpenBSD/patches/5.7/common/016_uvm.patch.sig

5.8:
http://ftp.openbsd.org/pub/OpenBSD/patches/5.8/common/003_uvm.patch.sig