linux-kernel - [PATCH 098/190] Revert "video: hgafb: fix potential NULL pointer dereference"

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Message-Id: <20210421130105.1226686-99-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 14:59:33 +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>, Aditya Pakki <pakki001@....edu>,
        Ferenc Bakonyi <fero@...ma.obuda.kando.hu>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 098/190] Revert "video: hgafb: fix potential NULL pointer dereference"

This reverts commit ec7f6aad57ad29e4e66cc2e18e1e1599ddb02542.

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: Aditya Pakki <pakki001@....edu>
Cc: Ferenc Bakonyi <fero@...ma.obuda.kando.hu>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/video/fbdev/hgafb.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/video/fbdev/hgafb.c b/drivers/video/fbdev/hgafb.c
index 8bbac7182ad3..fca29f219f8b 100644
--- a/drivers/video/fbdev/hgafb.c
+++ b/drivers/video/fbdev/hgafb.c
@@ -285,8 +285,6 @@ static int hga_card_detect(void)
 	hga_vram_len  = 0x08000;

 	hga_vram = ioremap(0xb0000, hga_vram_len);
-	if (!hga_vram)
-		goto error;

 	if (request_region(0x3b0, 12, "hgafb"))
 		release_io_ports = 1;
-- 
2.31.1