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@ideasonboard.com --- Changes in v4: - Slightly adjust commit messages - Link to v3: https://lore.kernel.org/r/20250818-cx18-v4l2-fh-v3-0-5e2f08f3cadc@ideasonboa...
Changes in v3: - Change helpers to accept the type they're going to operate on instead of using the open_id wrapper type as suggested by Laurent - Link to v2: https://lore.kernel.org/r/20250818-cx18-v4l2-fh-v2-0-3f53ce423663@ideasonboa...
Changes in v2: - Add Cc: stable@vger.kernel.org per-patch
--- Jacopo Mondi (2): media: cx18: Fix invalid access to file * media: ivtv: Fix invalid access to file *
drivers/media/pci/cx18/cx18-driver.c | 9 +++------ drivers/media/pci/cx18/cx18-ioctl.c | 30 +++++++++++++++++++----------- drivers/media/pci/cx18/cx18-ioctl.h | 8 +++++--- drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++------- drivers/media/pci/ivtv/ivtv-ioctl.c | 22 +++++++++++++++++----- drivers/media/pci/ivtv/ivtv-ioctl.h | 6 ++++-- 6 files changed, 52 insertions(+), 34 deletions(-) --- base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde
Best regards,