<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux-stable.git/drivers/media, branch v5.4.44</title>
<subtitle>Linux kernel stable tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/'/>
<entry>
<title>media: fdp1: Fix R-Car M3-N naming in debug message</title>
<updated>2020-05-27T15:46:44+00:00</updated>
<author>
<name>Geert Uytterhoeven</name>
<email>geert+renesas@glider.be</email>
</author>
<published>2019-10-24T13:09:16+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=76296dc723ef3e723a79c2684c419f8facec6779'/>
<id>76296dc723ef3e723a79c2684c419f8facec6779</id>
<content type='text'>
[ Upstream commit c05b9d7b9f3ece2831e4e4829f10e904df296df8 ]

The official name is "R-Car M3-N", not "R-Car M3N".

Fixes: 4e8c120de9268fc2 ("media: fdp1: Support M3N and E3 platforms")
Signed-off-by: Geert Uytterhoeven &lt;geert+renesas@glider.be&gt;
Reviewed-by: Kieran Bingham &lt;kieran.bingham+renesas@ideasonboard.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit c05b9d7b9f3ece2831e4e4829f10e904df296df8 ]

The official name is "R-Car M3-N", not "R-Car M3N".

Fixes: 4e8c120de9268fc2 ("media: fdp1: Support M3N and E3 platforms")
Signed-off-by: Geert Uytterhoeven &lt;geert+renesas@glider.be&gt;
Reviewed-by: Kieran Bingham &lt;kieran.bingham+renesas@ideasonboard.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>media: ti-vpe: cal: fix a kernel oops when unloading module</title>
<updated>2020-04-17T08:50:08+00:00</updated>
<author>
<name>Benoit Parrot</name>
<email>bparrot@ti.com</email>
</author>
<published>2020-03-06T13:08:39+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=15ae94fe22117b13da32babde12fe20e194304dc'/>
<id>15ae94fe22117b13da32babde12fe20e194304dc</id>
<content type='text'>
commit 80264809ea0a3fd2ee8251f31a9eb85d2c3fc77e upstream.

After the switch to use v4l2_async_notifier_add_subdev() and
v4l2_async_notifier_cleanup(), unloading the ti_cal module would cause a
kernel oops.

This was root cause to the fact that v4l2_async_notifier_cleanup() tries
to kfree the asd pointer passed into v4l2_async_notifier_add_subdev().

In our case the asd reference was from a statically allocated struct.
So in effect v4l2_async_notifier_cleanup() was trying to free a pointer
that was not kalloc.

So here we switch to using a kzalloc struct instead of a static one.
To achieve this we re-order some of the calls to prevent asd allocation
from leaking.

Fixes: d079f94c9046 ("media: platform: Switch to v4l2_async_notifier_add_subdev")
Cc: stable@vger.kernel.org
Signed-off-by: Benoit Parrot &lt;bparrot@ti.com&gt;
Reviewed-by: Tomi Valkeinen &lt;tomi.valkeinen@ti.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 80264809ea0a3fd2ee8251f31a9eb85d2c3fc77e upstream.

After the switch to use v4l2_async_notifier_add_subdev() and
v4l2_async_notifier_cleanup(), unloading the ti_cal module would cause a
kernel oops.

This was root cause to the fact that v4l2_async_notifier_cleanup() tries
to kfree the asd pointer passed into v4l2_async_notifier_add_subdev().

In our case the asd reference was from a statically allocated struct.
So in effect v4l2_async_notifier_cleanup() was trying to free a pointer
that was not kalloc.

So here we switch to using a kzalloc struct instead of a static one.
To achieve this we re-order some of the calls to prevent asd allocation
from leaking.

Fixes: d079f94c9046 ("media: platform: Switch to v4l2_async_notifier_add_subdev")
Cc: stable@vger.kernel.org
Signed-off-by: Benoit Parrot &lt;bparrot@ti.com&gt;
Reviewed-by: Tomi Valkeinen &lt;tomi.valkeinen@ti.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>media: ti-vpe: cal: fix disable_irqs to only the intended target</title>
<updated>2020-04-17T08:50:08+00:00</updated>
<author>
<name>Benoit Parrot</name>
<email>bparrot@ti.com</email>
</author>
<published>2020-03-02T13:56:52+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=3a59d985ceb11523c80857925fa59d60123f3bfa'/>
<id>3a59d985ceb11523c80857925fa59d60123f3bfa</id>
<content type='text'>
commit 1db56284b9da9056093681f28db48a09a243274b upstream.

disable_irqs() was mistakenly disabling all interrupts when called.
This cause all port stream to stop even if only stopping one of them.

Cc: stable &lt;stable@vger.kernel.org&gt;
Signed-off-by: Benoit Parrot &lt;bparrot@ti.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 1db56284b9da9056093681f28db48a09a243274b upstream.

disable_irqs() was mistakenly disabling all interrupts when called.
This cause all port stream to stop even if only stopping one of them.

Cc: stable &lt;stable@vger.kernel.org&gt;
Signed-off-by: Benoit Parrot &lt;bparrot@ti.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>media: venus: firmware: Ignore secure call error on first resume</title>
<updated>2020-04-17T08:50:08+00:00</updated>
<author>
<name>Stanimir Varbanov</name>
<email>stanimir.varbanov@linaro.org</email>
</author>
<published>2020-03-04T10:09:49+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=7ac962c5b730fdf7bb00aaaf4d0787505bc0d799'/>
<id>7ac962c5b730fdf7bb00aaaf4d0787505bc0d799</id>
<content type='text'>
commit 2632e7b618a7730969f9782593c29ca53553aa22 upstream.

With the latest cleanup in qcom scm driver the secure monitor
call for setting the remote processor state returns EINVAL when
it is called for the first time and after another scm call
auth_and_reset. The error returned from scm call could be ignored
because the state transition is already done in auth_and_reset.

Acked-by: Bjorn Andersson &lt;bjorn.andersson@linaro.org&gt;
Signed-off-by: Stanimir Varbanov &lt;stanimir.varbanov@linaro.org&gt;
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 2632e7b618a7730969f9782593c29ca53553aa22 upstream.

With the latest cleanup in qcom scm driver the secure monitor
call for setting the remote processor state returns EINVAL when
it is called for the first time and after another scm call
auth_and_reset. The error returned from scm call could be ignored
because the state transition is already done in auth_and_reset.

Acked-by: Bjorn Andersson &lt;bjorn.andersson@linaro.org&gt;
Signed-off-by: Stanimir Varbanov &lt;stanimir.varbanov@linaro.org&gt;
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>media: i2c: ov5695: Fix power on and off sequences</title>
<updated>2020-04-17T08:50:04+00:00</updated>
<author>
<name>Dongchun Zhu</name>
<email>dongchun.zhu@mediatek.com</email>
</author>
<published>2020-03-11T10:47:28+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=b6257832dd45799dfdda54cb32fa48907ee8ce58'/>
<id>b6257832dd45799dfdda54cb32fa48907ee8ce58</id>
<content type='text'>
[ Upstream commit f1a64f56663e9d03e509439016dcbddd0166b2da ]

From the measured hardware signal, OV5695 reset pin goes high for a
short period of time during boot-up. From the sensor specification, the
reset pin is active low and the DT binding defines the pin as active
low, which means that the values set by the driver are inverted and thus
the value requested in probe ends up high.

Fix it by changing probe to request the reset GPIO initialized to high,
which makes the initial state of the physical signal low.

In addition, DOVDD rising must occur before DVDD rising from spec., but
regulator_bulk_enable() API enables all the regulators asynchronously.
Use an explicit loops of regulator_enable() instead.

For power off sequence, it is required that DVDD falls first. Given the
bulk API does not give any guarantee about the order of regulators,
change the driver to use regulator_disable() instead.

The sensor also requires a delay between reset high and first I2C
transaction, which was assumed to be 8192 XVCLK cycles, but 1ms is
recommended by the vendor. Fix this as well.

Signed-off-by: Dongchun Zhu &lt;dongchun.zhu@mediatek.com&gt;
Signed-off-by: Tomasz Figa &lt;tfiga@chromium.org&gt;
Signed-off-by: Sakari Ailus &lt;sakari.ailus@linux.intel.com&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit f1a64f56663e9d03e509439016dcbddd0166b2da ]

From the measured hardware signal, OV5695 reset pin goes high for a
short period of time during boot-up. From the sensor specification, the
reset pin is active low and the DT binding defines the pin as active
low, which means that the values set by the driver are inverted and thus
the value requested in probe ends up high.

Fix it by changing probe to request the reset GPIO initialized to high,
which makes the initial state of the physical signal low.

In addition, DOVDD rising must occur before DVDD rising from spec., but
regulator_bulk_enable() API enables all the regulators asynchronously.
Use an explicit loops of regulator_enable() instead.

For power off sequence, it is required that DVDD falls first. Given the
bulk API does not give any guarantee about the order of regulators,
change the driver to use regulator_disable() instead.

The sensor also requires a delay between reset high and first I2C
transaction, which was assumed to be 8192 XVCLK cycles, but 1ms is
recommended by the vendor. Fix this as well.

Signed-off-by: Dongchun Zhu &lt;dongchun.zhu@mediatek.com&gt;
Signed-off-by: Tomasz Figa &lt;tfiga@chromium.org&gt;
Signed-off-by: Sakari Ailus &lt;sakari.ailus@linux.intel.com&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>media: i2c: video-i2c: fix build errors due to 'imply hwmon'</title>
<updated>2020-04-17T08:50:03+00:00</updated>
<author>
<name>Matt Ranostay</name>
<email>matt.ranostay@konsulko.com</email>
</author>
<published>2020-03-24T01:07:41+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=288761c9f0a2ec28dd269e4972163936bd739075'/>
<id>288761c9f0a2ec28dd269e4972163936bd739075</id>
<content type='text'>
[ Upstream commit 64d4fc9926f09861a35d8f0f7d81f056e6d5af7b ]

Fix build fault when CONFIG_HWMON is a module, and CONFIG_VIDEO_I2C
as builtin. This is due to 'imply hwmon' in the respective Kconfig.

Issue build log:

ld: drivers/media/i2c/video-i2c.o: in function `amg88xx_hwmon_init':
video-i2c.c:(.text+0x2e1): undefined reference to `devm_hwmon_device_register_with_info

Cc: rdunlap@infradead.org
Fixes: acbea6798955 (media: video-i2c: add hwmon support for amg88xx)
Signed-off-by: Matt Ranostay &lt;matt.ranostay@konsulko.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 64d4fc9926f09861a35d8f0f7d81f056e6d5af7b ]

Fix build fault when CONFIG_HWMON is a module, and CONFIG_VIDEO_I2C
as builtin. This is due to 'imply hwmon' in the respective Kconfig.

Issue build log:

ld: drivers/media/i2c/video-i2c.o: in function `amg88xx_hwmon_init':
video-i2c.c:(.text+0x2e1): undefined reference to `devm_hwmon_device_register_with_info

Cc: rdunlap@infradead.org
Fixes: acbea6798955 (media: video-i2c: add hwmon support for amg88xx)
Signed-off-by: Matt Ranostay &lt;matt.ranostay@konsulko.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>media: venus: hfi_parser: Ignore HEVC encoding for V1</title>
<updated>2020-04-17T08:50:00+00:00</updated>
<author>
<name>Stephan Gerhold</name>
<email>stephan@gerhold.net</email>
</author>
<published>2019-12-09T19:16:52+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=7bf2c31ba0bb23ec7c4646e77a8b63cf7b9d1701'/>
<id>7bf2c31ba0bb23ec7c4646e77a8b63cf7b9d1701</id>
<content type='text'>
[ Upstream commit c50cc6dc6c48300af63a6fbc71b647053c15fc80 ]

Some older MSM8916 Venus firmware versions also seem to indicate
support for encoding HEVC, even though they really can't.
This will lead to errors later because hfi_session_init() fails
in this case.

HEVC is already ignored for "dec_codecs", so add the same for
"enc_codecs" to make these old firmware versions work correctly.

Signed-off-by: Stephan Gerhold &lt;stephan@gerhold.net&gt;
Signed-off-by: Stanimir Varbanov &lt;stanimir.varbanov@linaro.org&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit c50cc6dc6c48300af63a6fbc71b647053c15fc80 ]

Some older MSM8916 Venus firmware versions also seem to indicate
support for encoding HEVC, even though they really can't.
This will lead to errors later because hfi_session_init() fails
in this case.

HEVC is already ignored for "dec_codecs", so add the same for
"enc_codecs" to make these old firmware versions work correctly.

Signed-off-by: Stephan Gerhold &lt;stephan@gerhold.net&gt;
Signed-off-by: Stanimir Varbanov &lt;stanimir.varbanov@linaro.org&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>media: rc: add keymap for Videostrong KII Pro</title>
<updated>2020-04-17T08:49:59+00:00</updated>
<author>
<name>Mohammad Rasim</name>
<email>mohammad.rasim96@gmail.com</email>
</author>
<published>2020-01-10T16:25:45+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=33dbe5867c3970fa5243b2c7c57f38a4bba46291'/>
<id>33dbe5867c3970fa5243b2c7c57f38a4bba46291</id>
<content type='text'>
[ Upstream commit 30defecb98400575349a7d32f0526e1dc42ea83e ]

This is an NEC remote control device shipped with the Videostrong KII Pro
tv box as well as other devices from videostrong.

Signed-off-by: Mohammad Rasim &lt;mohammad.rasim96@gmail.com&gt;
Signed-off-by: Sean Young &lt;sean@mess.org&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
[ Upstream commit 30defecb98400575349a7d32f0526e1dc42ea83e ]

This is an NEC remote control device shipped with the Videostrong KII Pro
tv box as well as other devices from videostrong.

Signed-off-by: Mohammad Rasim &lt;mohammad.rasim96@gmail.com&gt;
Signed-off-by: Sean Young &lt;sean@mess.org&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Sasha Levin &lt;sashal@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>media: v4l2-core: fix a use-after-free bug of sd-&gt;devnode</title>
<updated>2020-04-01T09:02:18+00:00</updated>
<author>
<name>Dafna Hirschfeld</name>
<email>dafna.hirschfeld@collabora.com</email>
</author>
<published>2020-02-19T15:25:54+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=5f80d17c517dc1dca43bd5acac77a1277d4d47ca'/>
<id>5f80d17c517dc1dca43bd5acac77a1277d4d47ca</id>
<content type='text'>
commit 6990570f7e0a6078e11b9c5dc13f4b6e3f49a398 upstream.

sd-&gt;devnode is released after calling
v4l2_subdev_release. Therefore it should be set
to NULL so that the subdev won't hold a pointer
to a released object. This fixes a reference
after free bug in function
v4l2_device_unregister_subdev

Fixes: 0e43734d4c46e ("media: v4l2-subdev: add release() internal op")

Cc: stable@vger.kernel.org
Signed-off-by: Dafna Hirschfeld &lt;dafna.hirschfeld@collabora.com&gt;
Reviewed-by: Ezequiel Garcia &lt;ezequiel@collabora.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
commit 6990570f7e0a6078e11b9c5dc13f4b6e3f49a398 upstream.

sd-&gt;devnode is released after calling
v4l2_subdev_release. Therefore it should be set
to NULL so that the subdev won't hold a pointer
to a released object. This fixes a reference
after free bug in function
v4l2_device_unregister_subdev

Fixes: 0e43734d4c46e ("media: v4l2-subdev: add release() internal op")

Cc: stable@vger.kernel.org
Signed-off-by: Dafna Hirschfeld &lt;dafna.hirschfeld@collabora.com&gt;
Reviewed-by: Ezequiel Garcia &lt;ezequiel@collabora.com&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

</pre>
</div>
</content>
</entry>
<entry>
<title>media: xirlink_cit: add missing descriptor sanity checks</title>
<updated>2020-04-01T09:02:18+00:00</updated>
<author>
<name>Johan Hovold</name>
<email>johan@kernel.org</email>
</author>
<published>2020-01-03T16:35:11+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux-stable.git/commit/?id=e7cd85f398cd1ffe3ce707ce7e2ec0e4a5010475'/>
<id>e7cd85f398cd1ffe3ce707ce7e2ec0e4a5010475</id>
<content type='text'>
commit a246b4d547708f33ff4d4b9a7a5dbac741dc89d8 upstream.

Make sure to check that we have two alternate settings and at least one
endpoint before accessing the second altsetting structure and
dereferencing the endpoint arrays.

This specifically avoids dereferencing NULL-pointers or corrupting
memory when a device does not have the expected descriptors.

Note that the sanity check in cit_get_packet_size() is not redundant as
the driver is mixing looking up altsettings by index and by number,
which may not coincide.

Fixes: 659fefa0eb17 ("V4L/DVB: gspca_xirlink_cit: Add support for camera with a bcd version of 0.01")
Fixes: 59f8b0bf3c12 ("V4L/DVB: gspca_xirlink_cit: support bandwidth changing for devices with 1 alt setting")
Cc: stable &lt;stable@vger.kernel.org&gt;     # 2.6.37
Cc: Hans de Goede &lt;hdegoede@redhat.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

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commit a246b4d547708f33ff4d4b9a7a5dbac741dc89d8 upstream.

Make sure to check that we have two alternate settings and at least one
endpoint before accessing the second altsetting structure and
dereferencing the endpoint arrays.

This specifically avoids dereferencing NULL-pointers or corrupting
memory when a device does not have the expected descriptors.

Note that the sanity check in cit_get_packet_size() is not redundant as
the driver is mixing looking up altsettings by index and by number,
which may not coincide.

Fixes: 659fefa0eb17 ("V4L/DVB: gspca_xirlink_cit: Add support for camera with a bcd version of 0.01")
Fixes: 59f8b0bf3c12 ("V4L/DVB: gspca_xirlink_cit: support bandwidth changing for devices with 1 alt setting")
Cc: stable &lt;stable@vger.kernel.org&gt;     # 2.6.37
Cc: Hans de Goede &lt;hdegoede@redhat.com&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
Signed-off-by: Hans Verkuil &lt;hverkuil-cisco@xs4all.nl&gt;
Signed-off-by: Mauro Carvalho Chehab &lt;mchehab+huawei@kernel.org&gt;
Signed-off-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;

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