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Change History

In the Linux kernel, the following vulnerability has been resolved:

media: mt9m114: Fix deadlock in get_frame_interval/set_frame_interval

Getting / Setting the frame interval using the V4L2 subdev pad ops
get_frame_interval/set_frame_interval causes a deadlock, as the
subdev state is locked in the [1] but also in the driver itself.

In [2] it's described that the caller is responsible to acquire and
release the lock in this case. Therefore, acquiring the lock in the
driver is wrong.

Remove the lock acquisitions/releases from mt9m114_ifp_get_frame_interval()
and mt9m114_ifp_set_frame_interval().

[1] drivers/media/v4l2-core/v4l2-subdev.c - line 1129
[2] Documentation/driver-api/media/v4l2-subdev.rst

https://git.kernel.org/stable/c/0d23b548d71e5d76955fdf1d73addd8f6494f602

https://git.kernel.org/stable/c/298d1471cf83d5a2a05970e41822a2403f451086

https://git.kernel.org/stable/c/41b97490a1656bdc7038d6345a84b08d45deafc6