CVE-2026-31687

Summary

In the Linux kernel, the following vulnerability has been resolved: gpio: omap: do not register driver in probe() Commit 11a78b794496 ("ARM: OMAP: MPUIO wake updates") registers the omap_mpuio_drive

Details

In the Linux kernel, the following vulnerability has been resolved: gpio: omap: do not register driver in probe() Commit 11a78b794496 ("ARM: OMAP: MPUIO wake updates") registers the omap_mpuio_driver from omap_mpuio_init(), which is called from omap_gpio_probe(). However, it neither makes sense to register drivers from probe() callbacks of other drivers, nor does the driver core allow registering drivers with a device lock already being held. The latter was revealed by commit dc23806a7c47 ("driver core: enforce device_lock for driver_match_device()") leading to a potential deadlock condition described in [1]. Additionally, the omap_mpuio_driver is never unregistered from the driver core, even if the module is unloaded. Hence, register the omap_mpuio_driver from the module initcall and unregister it in module_exit().

References

• https://git.kernel.org/stable/c/03db4dc9ad6eb91e640b517e00373ce877682854
• https://git.kernel.org/stable/c/1c04c3a4de8d4bcb9202f94c44f26c57c2572308
• https://git.kernel.org/stable/c/2211d77892913804d16c28c7415b82804ab1e54c
• https://git.kernel.org/stable/c/32f08c3ddd6dda6cbb6c9d715de10f21dccde50f
• https://git.kernel.org/stable/c/53a76425e0764421ba93bb9045d2e454667d5687
• https://git.kernel.org/stable/c/57bcd3feffa79544c73a1a1872472389a391cc79
• https://git.kernel.org/stable/c/673dafb9a86349a12a93151fd467625614dc7e12
• https://git.kernel.org/stable/c/730e5ebff40c852e3ea57b71bf02a4b89c69435f
• https://git.kernel.org/stable/c/86588916e1887a5edb8a9161cd7ae81e47a7ed25
• https://git.kernel.org/stable/c/a29215961d833f4de33a09c3964d31ebc6083033