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Date: Mon, 4 Mar 2024 01:00:47 GMT
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To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org,
dev-commits-src-main@FreeBSD.org
From: Konstantin Belousov <kib@FreeBSD.org>
Subject: git: a725a7a24de5 - main - posix_spawn(3): document
POSIX_SPAWN_DISABLE_ASLR_NP
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X-Git-Committer: kib
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X-Git-Refname: refs/heads/main
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X-Git-Commit: a725a7a24de585e996f21e190b5af41261ebc774
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The branch main has been updated by kib:
URL: https://cgit.FreeBSD.org/src/commit/?id=a725a7a24de585e996f21e190b5af41261ebc774
commit a725a7a24de585e996f21e190b5af41261ebc774
Author: Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2024-03-03 22:19:22 +0000
Commit: Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2024-03-04 01:00:39 +0000
posix_spawn(3): document POSIX_SPAWN_DISABLE_ASLR_NP
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
---
lib/libc/gen/posix_spawn.3 | 12 +++++++++++-
lib/libc/gen/posix_spawnattr_getflags.3 | 3 ++-
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/lib/libc/gen/posix_spawn.3 b/lib/libc/gen/posix_spawn.3
index a9ff7b2b21da..55559ae7222b 100644
--- a/lib/libc/gen/posix_spawn.3
+++ b/lib/libc/gen/posix_spawn.3
@@ -32,7 +32,7 @@
.\" the referee document. The original Standard can be obtained online at
.\" http://www.opengroup.org/unix/online.html.
.\"
-.Dd November 28, 2021
+.Dd March 4, 2024
.Dt POSIX_SPAWN 3
.Os
.Sh NAME
@@ -297,6 +297,15 @@ and the signals being indicated in the spawn-sigdefault attribute
of the object referenced by
.Fa attrp .
.Pp
+The Address Space Layout Randomization for the newly spawned process
+can be disabled by specifying the
+.Dv POSIX_SPAWN_DISABLE_ASLR_NP
+flag in the spawn-flags attribute.
+This setting is inherited by future children of the child as well.
+See
+.Xr procctl 2
+for more details.
+.Pp
If the value of the
.Fa attrp
pointer is NULL, then the default values are used.
@@ -432,6 +441,7 @@ action.
.Xr execve 2 ,
.Xr fcntl 2 ,
.Xr open 2 ,
+.Xr procctl 2 ,
.Xr sched_setparam 2 ,
.Xr sched_setscheduler 2 ,
.Xr setpgid 2 ,
diff --git a/lib/libc/gen/posix_spawnattr_getflags.3 b/lib/libc/gen/posix_spawnattr_getflags.3
index 18cf6683e935..308bbb386d76 100644
--- a/lib/libc/gen/posix_spawnattr_getflags.3
+++ b/lib/libc/gen/posix_spawnattr_getflags.3
@@ -32,7 +32,7 @@
.\" the referee document. The original Standard can be obtained online at
.\" http://www.opengroup.org/unix/online.html.
.\"
-.Dd March 24, 2008
+.Dd March 4, 2024
.Dt POSIX_SPAWNATTR_GETFLAGS 3
.Os
.Sh NAME
@@ -75,6 +75,7 @@ It is the bitwise-inclusive OR of zero or more of the following flags
.It Dv POSIX_SPAWN_SETSIGMASK
.It Dv POSIX_SPAWN_SETSCHEDPARAM
.It Dv POSIX_SPAWN_SETSCHEDULER
+.It Dv POSIX_SPAWN_DISABLE_ASLR_NP
.El
.Pp
These flags are defined in