linux-kernel - [PATCH 4.4 137/137] modules: fix modparam async

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Date:	Tue, 23 Feb 2016 19:34:28 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Hannes Reinecke <hare@...e.de>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"Luis R. Rodriguez" <mcgrof@...e.com>,
	"Rusty Russell [minimized]" <rusty@...tcorp.com.au>
Subject: [PATCH 4.4 137/137] modules: fix modparam async_probe request

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Luis R. Rodriguez <mcgrof@...e.com>

commit 4355efbd80482a961cae849281a8ef866e53d55c upstream.

Commit f2411da746985 ("driver-core: add driver module
asynchronous probe support") added async probe support,
in two forms:

  * in-kernel driver specification annotation
  * generic async_probe module parameter (modprobe foo async_probe)

To support the generic kernel parameter parse_args() was
extended via commit ecc8617053e0 ("module: add extra
argument for parse_params() callback") however commit
failed to f2411da746985 failed to add the required argument.

This causes a crash then whenever async_probe generic
module parameter is used. This was overlooked when the
form in which in-kernel async probe support was reworked
a bit... Fix this as originally intended.

Cc: Hannes Reinecke <hare@...e.de>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au> [minimized]
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 kernel/module.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3515,7 +3515,7 @@ static int load_module(struct load_info

 	/* Module is ready to execute: parsing args may do that. */
 	after_dashes = parse_args(mod->name, mod->args, mod->kp, mod->num_kp,
-				  -32768, 32767, NULL,
+				  -32768, 32767, mod,
 				  unknown_module_param_cb);
 	if (IS_ERR(after_dashes)) {
 		err = PTR_ERR(after_dashes);