Author: kib Date: Wed Oct 21 21:40:33 2020 New Revision: 366918 URL: https://svnweb.freebsd.org/changeset/base/366918
Log: mmap(2): Document guard size for MAP_STACK and related EINVAL. Based on submission by: emaste Reviewed by: emaste, markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D26894 Modified: head/lib/libc/sys/mmap.2 Modified: head/lib/libc/sys/mmap.2 ============================================================================== --- head/lib/libc/sys/mmap.2 Wed Oct 21 21:28:20 2020 (r366917) +++ head/lib/libc/sys/mmap.2 Wed Oct 21 21:40:33 2020 (r366918) @@ -28,7 +28,7 @@ .\" @(#)mmap.2 8.4 (Berkeley) 5/11/95 .\" $FreeBSD$ .\" -.Dd February 26, 2020 +.Dd October 21, 2020 .Dt MMAP 2 .Os .Sh NAME @@ -351,6 +351,8 @@ Stacks created with automatically grow. Guards prevent inadvertent use of the regions into which those stacks can grow without requiring mapping the whole stack in advance. +The size of the guard, in pages, is specified by sysctl +.Dv security.bsd.stack_guard_page . .El .Pp The @@ -451,6 +453,11 @@ or .Dv MAP_STACK was specified. At least one of these flags must be included. +.It Bq Er EINVAL +.Dv MAP_STACK +was specified and +.Va len +is less than or equal to the guard size. .It Bq Er EINVAL .Dv MAP_FIXED was specified and the _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
