diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2020-10-21 21:40:33 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2020-10-21 21:40:33 +0000 |
| commit | 69c09181d422f733e133280473a3450d0c249776 (patch) | |
| tree | b8d188115f40e01efa622ee76569d13178d1d5ad /lib/libc/sys | |
| parent | c7cffd65c5d858425e90b847d2e8e583e3b13bf7 (diff) | |
Notes
Diffstat (limited to 'lib/libc/sys')
| -rw-r--r-- | lib/libc/sys/mmap.2 | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/libc/sys/mmap.2 b/lib/libc/sys/mmap.2 index 32cb9f09e43fe..7d739e000b31e 100644 --- a/lib/libc/sys/mmap.2 +++ b/lib/libc/sys/mmap.2 @@ -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 @@ -452,6 +454,11 @@ or 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 .Fa addr |