Author: kib Date: Wed Oct 28 21:02:43 2020 New Revision: 367116 URL: https://svnweb.freebsd.org/changeset/base/367116
Log: MFC r366918: mmap(2): Document guard size for MAP_STACK and related EINVAL. Modified: stable/12/lib/libc/sys/mmap.2 Directory Properties: stable/12/ (props changed) Modified: stable/12/lib/libc/sys/mmap.2 ============================================================================== --- stable/12/lib/libc/sys/mmap.2 Wed Oct 28 21:01:00 2020 (r367115) +++ stable/12/lib/libc/sys/mmap.2 Wed Oct 28 21:02:43 2020 (r367116) @@ -28,7 +28,7 @@ .\" @(#)mmap.2 8.4 (Berkeley) 5/11/95 .\" $FreeBSD$ .\" -.Dd June 22, 2017 +.Dd October 21, 2020 .Dt MMAP 2 .Os .Sh NAME @@ -335,6 +335,8 @@ 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 @@ -435,6 +437,11 @@ 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-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
