linux-kernel - [PATCH 3.12 103/111] EDAC: Properly unwind on failure path in edac

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Date:	Wed, 10 Jun 2015 17:27:32 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	Borislav Petkov <bp@...e.de>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 103/111] EDAC: Properly unwind on failure path in edac_init()

From: Alexey Khoroshilov <khoroshilov@...ras.ru>

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

===============

commit c6b97bcf8e3ee6643a7f90a54d1ef3f9e12ec245 upstream.

edac_init() does not deallocate already allocated resources on failure
path.

Found by Linux Driver Verification project (linuxtesting.org).

 [ Boris: The unwind path functions have __exit annotation but are being
   used in an __init function, leading to section mismatches. Drop the
   section annotation and make them normal functions. ]

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Link: http://lkml.kernel.org/r/1423203162-26368-1-git-send-email-khoroshilov@ispras.ru
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/edac/edac_mc_sysfs.c |  4 ++--
 drivers/edac/edac_module.c   | 13 ++++++++-----
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/edac/edac_mc_sysfs.c b/drivers/edac/edac_mc_sysfs.c
index e5bdf216effe..66f2ccfa5665 100644
--- a/drivers/edac/edac_mc_sysfs.c
+++ b/drivers/edac/edac_mc_sysfs.c
@@ -911,7 +911,7 @@ int __init edac_debugfs_init(void)
 	return 0;
 }
 
-void __exit edac_debugfs_exit(void)
+void edac_debugfs_exit(void)
 {
 	debugfs_remove(edac_debugfs);
 }
@@ -1165,7 +1165,7 @@ int __init edac_mc_sysfs_init(void)
 	return err;
 }
 
-void __exit edac_mc_sysfs_exit(void)
+void edac_mc_sysfs_exit(void)
 {
 	device_unregister(mci_pdev);
 	edac_put_sysfs_subsys();
diff --git a/drivers/edac/edac_module.c b/drivers/edac/edac_module.c
index a66941fea5a4..afda850b0b95 100644
--- a/drivers/edac/edac_module.c
+++ b/drivers/edac/edac_module.c
@@ -112,20 +112,23 @@ static int __init edac_init(void)
 
 	err = edac_mc_sysfs_init();
 	if (err)
-		goto error;
+		goto err_sysfs;
 
 	edac_debugfs_init();
 
-	/* Setup/Initialize the workq for this core */
 	err = edac_workqueue_setup();
 	if (err) {
-		edac_printk(KERN_ERR, EDAC_MC, "init WorkQueue failure\n");
-		goto error;
+		edac_printk(KERN_ERR, EDAC_MC, "Failure initializing workqueue\n");
+		goto err_wq;
 	}
 
 	return 0;
 
-error:
+err_wq:
+	edac_debugfs_exit();
+	edac_mc_sysfs_exit();
+
+err_sysfs:
 	return err;
 }
 
-- 
2.4.2

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