From: David Lechner <dlechner@baylibre.com>
Date: Tue, 22 Jul 2025 22:05:46 +0000 (-0500)
Subject: media: pci: mg4b: fix uninitialized iio scan data
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=c0d3f6969bb4d72476cfe7ea9263831f1c283704;p=users%2Fhch%2Fmisc.git

media: pci: mg4b: fix uninitialized iio scan data

Fix potential leak of uninitialized stack data to userspace by ensuring
that the `scan` structure is zeroed before use.

Fixes: 0ab13674a9bd ("media: pci: mgb4: Added Digiteq Automotive MGB4 driver")
Cc: stable@vger.kernel.org
Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
---

diff --git a/drivers/media/pci/mgb4/mgb4_trigger.c b/drivers/media/pci/mgb4/mgb4_trigger.c
index 923650d53d4c..d7dddc5c8728 100644
--- a/drivers/media/pci/mgb4/mgb4_trigger.c
+++ b/drivers/media/pci/mgb4/mgb4_trigger.c
@@ -91,7 +91,7 @@ static irqreturn_t trigger_handler(int irq, void *p)
 	struct {
 		u32 data;
 		s64 ts __aligned(8);
-	} scan;
+	} scan = { };
 
 	scan.data = mgb4_read_reg(&st->mgbdev->video, 0xA0);
 	mgb4_write_reg(&st->mgbdev->video, 0xA0, scan.data);