linux-kernel - [PATCH] drm/panthor: validate group queue count

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Message-ID: <20250902192001.409738-1-olvaffe@gmail.com>
Date: Tue,  2 Sep 2025 12:20:01 -0700
From: Chia-I Wu <olvaffe@...il.com>
To: Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/panthor: validate group queue count

A panthor group can have at most MAX_CS_PER_CSG panthor queues.

Signed-off-by: Chia-I Wu <olvaffe@...il.com>
---
 drivers/gpu/drm/panthor/panthor_sched.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
index ba5dc3e443d9c..249ab889ca91f 100644
--- a/drivers/gpu/drm/panthor/panthor_sched.c
+++ b/drivers/gpu/drm/panthor/panthor_sched.c
@@ -3473,6 +3473,9 @@ int panthor_group_create(struct panthor_file *pfile,
 	    hweight64(group_args->tiler_core_mask) < group_args->max_tiler_cores)
 		return -EINVAL;
 
+	if (group_args->queues.count > MAX_CS_PER_CSG)
+		return -EINVAL;
+
 	group = kzalloc(sizeof(*group), GFP_KERNEL);
 	if (!group)
 		return -ENOMEM;
-- 
2.51.0.338.gd7d06c2dae-goog