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Message-Id: <20250818-cx18-v4l2-fh-v1-0-6fe153760bce@ideasonboard.com>
Date: Mon, 18 Aug 2025 14:40:10 +0200
From: Jacopo Mondi <jacopo.mondi@...asonboard.com>
To: Andy Walls <awalls@...metrocast.net>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Hans Verkuil <hverkuil+cisco@...nel.org>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Cc: Dan Carpenter <dan.carpenter@...aro.org>, stable@...r.kernel.org,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
Jacopo Mondi <jacopo.mondi@...asonboard.com>
Subject: [PATCH 0/2] media: pci: Fix invalid access to file *
Since commits
7b9eb53e8591 ("media: cx18: Access v4l2_fh from file")
9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file")
All the ioctl handlers access their private data structures
from file *
The ivtv and cx18 drivers call the ioctl handlers from their
DVB layer without a valid file *, causing invalid memory access.
The issue has been reported by smatch in
"[bug report] media: cx18: Access v4l2_fh from file"
Fix this by providing wrappers for the ioctl handlers to be
used by the DVB layer that do not require a valid file *.
Signed-off-by: Jacopo Mondi <jacopo.mondi@...asonboard.com>
---
Jacopo Mondi (2):
media: cx18: Fix invalid access to file *
media: ivtv: Fix invalid access to file *
drivers/media/pci/cx18/cx18-driver.c | 6 +++---
drivers/media/pci/cx18/cx18-ioctl.c | 26 ++++++++++++++++++++------
drivers/media/pci/cx18/cx18-ioctl.h | 8 +++++---
drivers/media/pci/ivtv/ivtv-driver.c | 4 ++--
drivers/media/pci/ivtv/ivtv-ioctl.c | 22 +++++++++++++++++-----
drivers/media/pci/ivtv/ivtv-ioctl.h | 6 ++++--
6 files changed, 51 insertions(+), 21 deletions(-)
---
base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc
change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde
Best regards,
--
Jacopo Mondi <jacopo.mondi@...asonboard.com>
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