linux-kernel - [PATCH 2/7] Revert "rtc: mc13xxx: fix a double-unlock issue"

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Message-Id: <20210429130811.3353369-3-gregkh@linuxfoundation.org>
Date:   Thu, 29 Apr 2021 15:08:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Qiushi Wu <wu000273@....edu>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH 2/7] Revert "rtc: mc13xxx: fix a double-unlock issue"

This reverts commit 8816cd726a4fee197af2d851cbe25991ae19ea14.

Commits from @umn.edu addresses have been found to be submitted in "bad
faith" to try to test the kernel community's ability to review "known
malicious" changes.  The result of these submissions can be found in a
paper submitted to the 42nd IEEE Symposium on Security and Privacy
entitled, "Open Source Insecurity: Stealthily Introducing
Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University
of Minnesota) and Kangjie Lu (University of Minnesota) but later
withdrawn.

Because of this, all submissions from this group must be reverted from
the kernel tree and will need to be re-reviewed again to determine if
they actually are a valid fix.  Until that work is complete, remove this
change to ensure that no problems are being introduced into the
codebase.

Cc: Qiushi Wu <wu000273@....edu>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/rtc/rtc-mc13xxx.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
index d4234e78497e..0921ca792847 100644
--- a/drivers/rtc/rtc-mc13xxx.c
+++ b/drivers/rtc/rtc-mc13xxx.c
@@ -308,10 +308,8 @@ static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
 	mc13xxx_unlock(mc13xxx);

 	ret = devm_rtc_register_device(priv->rtc);
-	if (ret) {
-		mc13xxx_lock(mc13xxx);
+	if (ret)
 		goto err_irq_request;
-	}

 	return 0;

-- 
2.31.1