| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 013/124] char: lack of bool string made CONFIG_DEVPORT always on | Date | Thu, 20 Apr 2017 08:34:48 +0200 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Max Bires <jbires@google.com>
commit f2cfa58b136e4b06a9b9db7af5ef62fbb5992f62 upstream.
Without a bool string present, using "# CONFIG_DEVPORT is not set" in defconfig files would not actually unset devport. This esnured that /dev/port was always on, but there are reasons a user may wish to disable it (smaller kernel, attack surface reduction) if it's not being used. Adding a message here in order to make this user visible.
Signed-off-by: Max Bires <jbires@google.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/char/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -574,9 +574,12 @@ config TELCLOCK controlling the behavior of this hardware. config DEVPORT - bool + bool "/dev/port character device" depends on ISA || PCI default y + help + Say Y here if you want to support the /dev/port device. The /dev/port + device is similar to /dev/mem, but for I/O ports. source "drivers/s390/char/Kconfig"
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