linux-kernel - [PATCH] media: renesas: vsp1: Fix NULL pointer deref on module unload

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Message-Id: <20260115-rcar-vsp-crash-fix-v1-1-247bd51767fd@ideasonboard.com>
Date: Thu, 15 Jan 2026 11:22:35 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Hans Verkuil <hverkuil@...nel.org>, 
 Jacopo Mondi <jacopo.mondi+renesas@...asonboard.com>
Cc: linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, 
 Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH] media: renesas: vsp1: Fix NULL pointer deref on module
 unload

From: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>

When unloading the module on gen 4, we hit a NULL pointer dereference.
This is caused by the cleanup code calling vsp1_drm_cleanup() where it
should be calling vsp1_vspx_cleanup().

Fix this by checking the IP version and calling the drm or vspx function
accordingly, the same way as the init code does.

Fixes: d06c1a9f348d ("media: vsp1: Add VSPX support")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
---
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/media/platform/renesas/vsp1/vsp1_drv.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
index 6c64657fc4f3..30df9b36642d 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
@@ -240,8 +240,12 @@ static void vsp1_destroy_entities(struct vsp1_device *vsp1)
 		media_device_unregister(&vsp1->media_dev);
 	media_device_cleanup(&vsp1->media_dev);
 
-	if (!vsp1->info->uapi)
-		vsp1_drm_cleanup(vsp1);
+	if (!vsp1->info->uapi) {
+		if (vsp1->info->version == VI6_IP_VERSION_MODEL_VSPX_GEN4)
+			vsp1_vspx_cleanup(vsp1);
+		else
+			vsp1_drm_cleanup(vsp1);
+	}
 }
 
 static int vsp1_create_entities(struct vsp1_device *vsp1)

---
base-commit: 7d0a66e4bb9081d75c82ec4957c50034cb0ea449
change-id: 20260115-rcar-vsp-crash-fix-8d4871f0f39e

Best regards,
-- 
Tomi Valkeinen <tomi.valkeinen@...asonboard.com>