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Colin Ian King 604e648e8b media: cx25821: prevent out-of-bounds read on array card

[ Upstream commit 67300abdbe ]

Currently an out of range dev->nr is detected by just reporting the
issue and later on an out-of-bounds read on array card occurs because
of this. Fix this by checking the upper range of dev->nr with the size
of array card (removes the hard coded size), move this check earlier
and also exit with the error -ENOSYS to avoid the later out-of-bounds
array read.

Detected by CoverityScan, CID#711191 ("Out-of-bounds-read")

Fixes: commit 02b20b0b4c ("V4L/DVB (12730): Add conexant cx25821 driver")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[hans.verkuil@cisco.com: %ld -> %zd]
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-05-25 16:17:58 +02:00

cec

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

common

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

dvb-core

media: dmxdev: fix error code for invalid ioctls

2018-05-25 16:17:55 +02:00

dvb-frontends

media: lgdt3306a: Fix a double kfree on i2c device remove