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authorDavid Howells <dhowells@redhat.com>2017-04-04 16:54:28 +0100
committerDavid Howells <dhowells@redhat.com>2017-04-20 12:02:32 +0100
commitdbf05cb05f61145069d01ca9c6a896159184af88 (patch)
tree02d6de6988d7109dc6d6bdb78cd0f2cfc652043a
parent32820d8abd4d9502208697f0d26a3f8761b5868f (diff)
downloadblackbird-op-linux-dbf05cb05f61145069d01ca9c6a896159184af88.tar.gz
blackbird-op-linux-dbf05cb05f61145069d01ca9c6a896159184af88.zip
Annotate hardware config module parameters in drivers/staging/speakup/
When the kernel is running in secure boot mode, we lock down the kernel to prevent userspace from modifying the running kernel image. Whilst this includes prohibiting access to things like /dev/mem, it must also prevent access by means of configuring driver modules in such a way as to cause a device to access or modify the kernel image. To this end, annotate module_param* statements that refer to hardware configuration and indicate for future reference what type of parameter they specify. The parameter parser in the core sees this information and can skip such parameters with an error message if the kernel is locked down. The module initialisation then runs as normal, but just sees whatever the default values for those parameters is. Note that we do still need to do the module initialisation because some drivers have viable defaults set in case parameters aren't specified and some drivers support automatic configuration (e.g. PNP or PCI) in addition to manually coded parameters. This patch annotates drivers in drivers/staging/speakup/. Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: speakup@linux-speakup.org cc: devel@driverdev.osuosl.org
-rw-r--r--drivers/staging/speakup/speakup_acntpc.c2
-rw-r--r--drivers/staging/speakup/speakup_dtlk.c2
-rw-r--r--drivers/staging/speakup/speakup_keypc.c2
3 files changed, 3 insertions, 3 deletions
diff --git a/drivers/staging/speakup/speakup_acntpc.c b/drivers/staging/speakup/speakup_acntpc.c
index c7fab261d860..b6fbf9de1f85 100644
--- a/drivers/staging/speakup/speakup_acntpc.c
+++ b/drivers/staging/speakup/speakup_acntpc.c
@@ -307,7 +307,7 @@ static void accent_release(void)
speakup_info.port_tts = 0;
}
-module_param_named(port, port_forced, int, 0444);
+module_param_hw_named(port, port_forced, int, ioport, 0444);
module_param_named(start, synth_acntpc.startup, short, 0444);
MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
diff --git a/drivers/staging/speakup/speakup_dtlk.c b/drivers/staging/speakup/speakup_dtlk.c
index e2bf20806d8d..9c097fda07b0 100644
--- a/drivers/staging/speakup/speakup_dtlk.c
+++ b/drivers/staging/speakup/speakup_dtlk.c
@@ -378,7 +378,7 @@ static void dtlk_release(void)
speakup_info.port_tts = 0;
}
-module_param_named(port, port_forced, int, 0444);
+module_param_hw_named(port, port_forced, int, ioport, 0444);
module_param_named(start, synth_dtlk.startup, short, 0444);
MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
diff --git a/drivers/staging/speakup/speakup_keypc.c b/drivers/staging/speakup/speakup_keypc.c
index 10f4964782e2..e653b52175b8 100644
--- a/drivers/staging/speakup/speakup_keypc.c
+++ b/drivers/staging/speakup/speakup_keypc.c
@@ -309,7 +309,7 @@ static void keynote_release(void)
synth_port = 0;
}
-module_param_named(port, port_forced, int, 0444);
+module_param_hw_named(port, port_forced, int, ioport, 0444);
module_param_named(start, synth_keypc.startup, short, 0444);
MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
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