linux-kernel - [PATCH 104/190] Revert "char: hpet: fix a missing check of ioremap"

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Message-Id: <20210421130105.1226686-105-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 14:59:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kangjie Lu <kjlu@....edu>
Subject: [PATCH 104/190] Revert "char: hpet: fix a missing check of ioremap"

This reverts commit 13bd14a41ce3105d5b1f3cd8b4d1e249d17b6d9b.

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 published at 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).

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: Kangjie Lu <kjlu@....edu>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/hpet.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index ed3b7dab678d..6f13def6c172 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -969,8 +969,6 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
 	if (ACPI_SUCCESS(status)) {
 		hdp->hd_phys_address = addr.address.minimum;
 		hdp->hd_address = ioremap(addr.address.minimum, addr.address.address_length);
-		if (!hdp->hd_address)
-			return AE_ERROR;

 		if (hpet_is_known(hdp)) {
 			iounmap(hdp->hd_address);
-- 
2.31.1