44 lines
1.6 KiB
Plaintext
Executable File
44 lines
1.6 KiB
Plaintext
Executable File
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.
|