This is a note to let you know that I've just added the patch titled
TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tiocsti-document-cap_sys_admin-behaviour-in-kconfig.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3f29d9ee323ae5cda59d144d1f8b0b10ea065be0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=BCnther=20Noack?= <gnoack3000@xxxxxxxxx>
Date: Tue, 8 Aug 2023 22:11:12 +0200
Subject: TIOCSTI: Document CAP_SYS_ADMIN behaviour in Kconfig
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From: Günther Noack <gnoack3000@xxxxxxxxx>
commit 3f29d9ee323ae5cda59d144d1f8b0b10ea065be0 upstream.
Clarifies that the LEGACY_TIOCSTI setting is safe to turn off even
when running BRLTTY, as it was introduced in commit 690c8b804ad2
("TIOCSTI: always enable for CAP_SYS_ADMIN").
Signed-off-by: Günther Noack <gnoack3000@xxxxxxxxx>
Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230808201115.23993-1-gnoack3000@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/Kconfig | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/tty/Kconfig
+++ b/drivers/tty/Kconfig
@@ -164,6 +164,9 @@ config LEGACY_TIOCSTI
userspace depends on this functionality to continue operating
normally.
+ Processes which run with CAP_SYS_ADMIN, such as BRLTTY, can
+ use TIOCSTI even when this is set to N.
+
This functionality can be changed at runtime with the
dev.tty.legacy_tiocsti sysctl. This configuration option sets
the default value of the sysctl.
Patches currently in stable-queue which might be from gnoack3000@xxxxxxxxx are
queue-6.4/tiocsti-document-cap_sys_admin-behaviour-in-kconfig.patch
