linux-kernel - [PATCH RESEND] Documentation: update kernel parameter limit notes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALDQ5Ny1mbcUSk8pDL6HEq0Cgqze1tidyOeAgVxc5tyZNb+P_g@mail.gmail.com>
Date:   Tue, 28 Feb 2023 19:05:48 +0000
From:   James Addison <jay@...hosting.net>
To:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     corbet@....net, Randy Dunlap <rdunlap@...radead.org>
Subject: [PATCH RESEND] Documentation: update kernel parameter limit notes

There does appear to be a limit on the number of parameters accepted by the
kernel at boot-time, so this changeset updates the kernel-parameters.rst
documentation to reflect that.

Signed-off-by: James Addison <jay@...hosting.net>
---
 Documentation/admin-guide/kernel-parameters.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.rst
b/Documentation/admin-guide/kernel-parameters.rst
index 19600c502..a3a099127 100644
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -203,7 +203,8 @@ be entered as an environment variable, whereas its
absence indicates that
 it will appear as a kernel argument readable via /proc/cmdline by programs
 running once the system is up.

-The number of kernel parameters is not limited, but the length of the
+The number of kernel parameters is limited to 32 by default (128 in User Mode
+Linux), and is defined in ./init/main.c as MAX_INIT_ARGS. The length of the
 complete command line (parameters including spaces etc.) is limited to
 a fixed number of characters. This limit depends on the architecture
 and is between 256 and 4096 characters. It is defined in the file

base-commit: e492250d5252635b6c97d52eddf2792ec26f1ec1
-- 
2.39.2