svn commit: r341399 - head/sys/dev/acpica

[Konstantin Belousov]

Author: kib
Date: Sun Dec  2 13:27:36 2018
New Revision: 341399
URL: https://svnweb.freebsd.org/changeset/base/341399

Log:
  Fix off by one in hpet_mmap() csw method.
  
  Reported by:	C Turt <ecturt at gmail.com>
  Reviewed by:	alc, markj
  Tested by:	pho
  admbug:		781
  MFC after:	2 weeks
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/dev/acpica/acpi_hpet.c

Modified: head/sys/dev/acpica/acpi_hpet.c
==============================================================================
--- head/sys/dev/acpica/acpi_hpet.c	Sun Dec  2 13:16:46 2018	(r341398)
+++ head/sys/dev/acpica/acpi_hpet.c	Sun Dec  2 13:27:36 2018	(r341399)
@@ -396,7 +396,7 @@ hpet_mmap(struct cdev *cdev, vm_ooffset_t offset, vm_p
 	struct hpet_softc *sc;
 
 	sc = cdev->si_drv1;
-	if (offset > rman_get_size(sc->mem_res))
+	if (offset >= rman_get_size(sc->mem_res))
 		return (EINVAL);
 	if (!sc->mmap_allow_write && (nprot & PROT_WRITE))
 		return (EPERM);