Testing for regressions in Media Controller API register, ioctl, syscall,
and unregister paths. There have a few problems that result in user-after
free on media_device, media_devnode, and cdev pointers when the driver is
unbound while ioctl is in progress.

Test Procedure:

Run bin/unbind loop while ioctls are in progress.
Run rmmod and modprobe.
Disconnect the device.

Setup:

Build media_device_test
cd tools/testing/selftests/media_tests
make

Regressions test for cdev user-after free error on /dev/mediaX when driver
is unbound:

Start media_device_test to regression test media devnode dynamic alloc
and cdev user-after-free fixes. This opens media dev files and sits in
a loop running media ioctl MEDIA_IOC_DEVICE_INFO command once every 10
seconds. The idea is when device file goes away, media devnode and cdev
should stick around until this test exits.

The test for a random number of iterations or until user kills it with a
sleep 10 in between the ioctl calls.

sudo ./media_device_test -d /dev/mediaX

Regression test for media_devnode unregister race with ioctl_syscall:

Start 6 open_loop_test.sh tests with different /dev/mediaX files. When
device file goes away after unbind, device file name changes. Start the
test with possible device names. If we start with /dev/media0 for example,
after unbind, /dev/media1 or /dev/media2 could get created. The idea is
keep ioctls going while bind/unbind runs.

Copy bind_unbind_sample.txt and make changes to specify the driver name
and number to run bind and unbind. Start the bind_unbind.sh

Run dmesg looking for any user-after free errors or mutex lock errors.
c937'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/misc/cxl-base.h'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/misc/cxl-base.h'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=d07830db1bdb254e4b50d366010b219286b8c937'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=d07830db1bdb254e4b50d366010b219286b8c937'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/misc?id=d07830db1bdb254e4b50d366010b219286b8c937'>misc</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>cxl-base.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='d07830db1bdb254e4b50d366010b219286b8c937'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Marcel J.E. Mol &lt;marcel@mesa.nl&gt;</td><td class='right'>2017-01-30 19:26:40 +0100</td></tr>
<tr><th>committer</th><td>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-31 17:27:04 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>d07830db1bdb254e4b50d366010b219286b8c937</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d07830db1bdb254e4b50d366010b219286b8c937'>354d7fca237fa3d7e7e63c2196eaa4e1086838ea</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937'>include/misc/cxl-base.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/misc/cxl-base.h?id=5d03a2fd2292e71936c4235885c35ccc3c94695b'>5d03a2fd2292e71936c4235885c35ccc3c94695b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/misc/cxl-base.h?id=d07830db1bdb254e4b50d366010b219286b8c937&amp;id2=5d03a2fd2292e71936c4235885c35ccc3c94695b'>diff</a>)</td></tr></table>
<div class='commit-subject'>USB: serial: pl2303: add ATEN device ID</div><div class='commit-msg'>Seems that ATEN serial-to-usb devices using pl2303 exist with
different device ids. This patch adds a missing device ID so it
is recognised by the driver.

Signed-off-by: Marcel J.E. Mol &lt;marcel@mesa.nl&gt;
Cc: stable &lt;stable@vger.kernel.org&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d07830db1bdb254e4b50d366010b219286b8c937'>Diffstat</a> (limited to 'include/misc/cxl-base.h')</div><table summary='diffstat' class='diffstat'>