linux-kernel - [PATCH 149/190] Revert "media: lgdt3306a: fix a missing check of return value"

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Message-Id: <20210421130105.1226686-150-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 15:00:24 +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>, Sean Young <sean@...s.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 149/190] Revert "media: lgdt3306a: fix a missing check of return value"

This reverts commit c9b7d8f252a5a6f8ca6e948151367cbc7bc4b776.

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: Sean Young <sean@...s.org>
Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/media/dvb-frontends/lgdt3306a.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c
index 722576f1732a..f34263a33ede 100644
--- a/drivers/media/dvb-frontends/lgdt3306a.c
+++ b/drivers/media/dvb-frontends/lgdt3306a.c
@@ -1690,10 +1690,7 @@ static int lgdt3306a_read_signal_strength(struct dvb_frontend *fe,
 	case QAM_256:
 	case QAM_AUTO:
 		/* need to know actual modulation to set proper SNR baseline */
-		ret = lgdt3306a_read_reg(state, 0x00a6, &val);
-		if (lg_chkerr(ret))
-			goto fail;
-
+		lgdt3306a_read_reg(state, 0x00a6, &val);
 		if(val & 0x04)
 			ref_snr = 2800; /* QAM-256 28dB */
 		else
-- 
2.31.1