In the Linux kernel, the following vulnerability has been resolved: mfd: macsmc: Initialize mutex Initialize struct apple_smc's mutex in apple_smc_probe(). Using the mutex uninitialized surprisingly resulted only in occasional NULL pointer dereferences in apple_smc_read() calls from the probe() functions of sub devices.
https://git.kernel.org/stable/c/a1e9e299c0d9ea42ab1067b39fb72e976d3f1bdb
https://git.kernel.org/stable/c/414f65d6736342c77d4ec5e7373039f4a09250dd
https://git.kernel.org/stable/c/2d5932588f029f7787f52c29174fead9bbc6b2cf