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From: Kangjie Lu <kjlu@umn.edu>
To: kjlu@umn.edu
Cc: pakki001@umn.edu,
	Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>,
	Haneen Mohammed <hamohammed.sa@gmail.com>,
	Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH] drm: vkms: check status of alloc_ordered_workqueue
Date: Fri,  8 Mar 2019 22:36:27 -0600	[thread overview]
Message-ID: <20190309043628.6078-1-kjlu@umn.edu> (raw)

alloc_ordered_workqueue may fail and return NULL.
The fix returns ENOMEM when it fails to avoid potential NULL
pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
 drivers/gpu/drm/vkms/vkms_crtc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index 8a9aeb0a9ea8..bb66dbcd5e3f 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -219,6 +219,8 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
 	spin_lock_init(&vkms_out->state_lock);
 
 	vkms_out->crc_workq = alloc_ordered_workqueue("vkms_crc_workq", 0);
+	if (!vkms_out->crc_workq)
+		return -ENOMEM;
 
 	return ret;
 }
-- 
2.17.1


             reply	other threads:[~2019-03-09  4:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-09  4:36 Kangjie Lu [this message]
2019-03-23  2:32 ` [PATCH] drm: vkms: check status of alloc_ordered_workqueue Kangjie Lu
2019-03-25  8:34   ` Daniel Vetter
2019-03-25  8:34     ` Daniel Vetter
2019-03-23 10:05 ` Mukesh Ojha
2019-03-23 21:42   ` [PATCH v2] " Kangjie Lu
2019-03-25  8:31     ` Daniel Vetter
2019-03-25  8:31       ` Daniel Vetter

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