linux-kernel - [PATCH 017/190] Revert "drm/nouveau: fix reference count leak in nv50_disp_atomic

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Message-Id: <20210421130105.1226686-18-gregkh@linuxfoundation.org>
Date:   Wed, 21 Apr 2021 14:58:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Aditya Pakki <pakki001@....edu>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: [PATCH 017/190] Revert "drm/nouveau: fix reference count leak in nv50_disp_atomic_commit"

This reverts commit a2cdf39536b0d21fb06113f5e16692513d7bcb9c.

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: Aditya Pakki <pakki001@....edu>
Cc: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 1c9c0cdf85db..8ae298ab1cfb 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2320,10 +2320,8 @@ nv50_disp_atomic_commit(struct drm_device *dev,
 	int ret, i;

 	ret = pm_runtime_get_sync(dev->dev);
-	if (ret < 0 && ret != -EACCES) {
-		pm_runtime_put_autosuspend(dev->dev);
+	if (ret < 0 && ret != -EACCES)
 		return ret;
-	}

 	ret = drm_atomic_helper_setup_commit(state, nonblock);
 	if (ret)
-- 
2.31.1