Request to backport "sysctl: fix proc_dobool() usability" to stable kernels

[Thomas Weißschuh]

Hi -stable team,

please backport the commit f1aa2eb5ea05 ("sysctl: fix proc_dobool() usability")
to the stable kernels containing commit 83efeeeb3d04 ("tty: Allow TIOCSTI to be disabled").
(Which seems only to be the 6.2 branch only at the moment)

Without this backport the sysctl dev.net.legacy_tiocsti to enable
ioctl(TIOCSTI) is not functional. So on kernels that don't enable
CONFIG_LEGACY_TIOCSTI, ioctl(TIOCSTI) is not usable at all.

This ioctl is used for the copy-and-paste functionality of the
screenreader "fenrir".
( https://github.com/chrys87/fenrir )

Reported-by: Storm Dragon <stormdragon2976@xxxxxxxxx>
Link: https://lore.kernel.org/lkml/ZAOi9hDBTYqoAZuI@xxxxxxxxxxx/