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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	Qiujun Huang <hqjagain@gmail.com>
Subject: [PATCH AUTOSEL 5.4 19/19] drm/lease: fix WARNING in idr_destroy
Date: Thu, 26 Mar 2020 19:24:31 -0400
Message-ID: <20200326232431.7816-19-sashal@kernel.org> (raw)
In-Reply-To: <20200326232431.7816-1-sashal@kernel.org>

From: Qiujun Huang <hqjagain@gmail.com>

[ Upstream commit b216a8e7908cd750550c0480cf7d2b3a37f06954 ]

drm_lease_create takes ownership of leases. And leases will be released
by drm_master_put.


So we needn't call idr_destroy again.

Reported-and-tested-by: syzbot+05835159fe322770fe3d@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1584518030-4173-1-git-send-email-hqjagain@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
 drivers/gpu/drm/drm_lease.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_lease.c b/drivers/gpu/drm/drm_lease.c
index b481cafdde280..825abe38201ac 100644
--- a/drivers/gpu/drm/drm_lease.c
+++ b/drivers/gpu/drm/drm_lease.c
@@ -542,10 +542,12 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev,
 	DRM_DEBUG_LEASE("Creating lease\n");
+	/* lessee will take the ownership of leases */
 	lessee = drm_lease_create(lessor, &leases);
 	if (IS_ERR(lessee)) {
 		ret = PTR_ERR(lessee);
+		idr_destroy(&leases);
 		goto out_leases;
@@ -580,7 +582,6 @@ int drm_mode_create_lease_ioctl(struct drm_device *dev,
-	idr_destroy(&leases);
 	DRM_DEBUG_LEASE("drm_mode_create_lease_ioctl failed: %d\n", ret);
 	return ret;

dri-devel mailing list

      parent reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26 23:24 [PATCH AUTOSEL 5.4 01/19] drm/bridge: dw-hdmi: fix AVI frame colorimetry Sasha Levin
2020-03-26 23:24 ` [PATCH AUTOSEL 5.4 05/19] drm/amd/display: Add link_rate quirk for Apple 15" MBP 2017 Sasha Levin
2020-03-26 23:24 ` [PATCH AUTOSEL 5.4 06/19] drm/bochs: downgrade pci_request_region failure from error to warning Sasha Levin
2020-03-26 23:24 ` [PATCH AUTOSEL 5.4 10/19] drm/amdgpu: fix typo for vcn1 idle check Sasha Levin
2020-03-26 23:24 ` Sasha Levin [this message]

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