linux-kernel - [PATCH 43/83] hsa/radeon: NULL pointer dereference bug workaround

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Date:	Fri, 11 Jul 2014 00:53:59 +0300
From:	Oded Gabbay <oded.gabbay@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	Jerome Glisse <j.glisse@...il.com>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	John Bridgman <John.Bridgman@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Joerg Roedel <joro@...tes.org>,
	Alexey Skidanov <Alexey.Skidanov@....com>,
	Oded Gabbay <oded.gabbay@....com>
Subject: [PATCH 43/83] hsa/radeon: NULL pointer dereference bug workaround

From: Alexey Skidanov <Alexey.Skidanov@....com>

Signed-off-by: Alexey Skidanov <Alexey.Skidanov@....com>
Signed-off-by: Oded Gabbay <oded.gabbay@....com>
---
 drivers/gpu/hsa/radeon/kfd_sched_cik_static.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
index 7573d25..7ee8125 100644
--- a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
+++ b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
@@ -627,8 +627,10 @@ static void cik_static_deregister_process(struct kfd_scheduler *scheduler,
 	struct cik_static_private *priv = kfd_scheduler_to_private(scheduler);
 	struct cik_static_process *pp = kfd_process_to_private(scheduler_process);
 
-	release_vmid(priv, pp->vmid);
-	kfree(pp);
+	if (priv && pp) {
+		release_vmid(priv, pp->vmid);
+		kfree(pp);
+	}
 }
 
 static bool allocate_hqd(struct cik_static_private *priv, unsigned int *queue)
-- 
1.9.1

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