linux-kernel - [PATCH] media: intel/ipu6: Fix a null pointer dereference in ipu6_isys_query_stream_by

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Date: Fri,  7 Jun 2024 16:25:42 +0800
From: Hao Ge <hao.ge@...ux.dev>
To: sakari.ailus@...ux.intel.com,
	bingbu.cao@...el.com,
	tian.shu.qiu@...el.com,
	mchehab@...nel.org
Cc: hverkuil-cisco@...all.nl,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hao Ge <gehao@...inos.cn>
Subject: [PATCH] media: intel/ipu6: Fix a null pointer dereference in ipu6_isys_query_stream_by_source

From: Hao Ge <gehao@...inos.cn>

stream is NULL when source is less than 0 in
ipu6_isys_query_stream_by_source. It's a null
pointer dereference.

Actually, this should be isys->adev->auxdev.dev.

Fixes: 3c1dfb5a69cf ("media: intel/ipu6: input system video nodes and buffer queues")
Signed-off-by: Hao Ge <gehao@...inos.cn>
---
 drivers/media/pci/intel/ipu6/ipu6-isys-video.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/intel/ipu6/ipu6-isys-video.c b/drivers/media/pci/intel/ipu6/ipu6-isys-video.c
index c8a33e1e910c..06090cc0a476 100644
--- a/drivers/media/pci/intel/ipu6/ipu6-isys-video.c
+++ b/drivers/media/pci/intel/ipu6/ipu6-isys-video.c
@@ -943,7 +943,7 @@ ipu6_isys_query_stream_by_source(struct ipu6_isys *isys, int source, u8 vc)
 		return NULL;
 
 	if (source < 0) {
-		dev_err(&stream->isys->adev->auxdev.dev,
+		dev_err(&isys->adev->auxdev.dev,
 			"query stream with invalid port number\n");
 		return NULL;
 	}
-- 
2.25.1