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

serial: max310x: fix NULL pointer dereference in I2C instantiation

When trying to instantiate a max14830 device from userspace:

    echo max14830 0x60 > /sys/bus/i2c/devices/i2c-2/new_device

we get the following error:

    Unable to handle kernel NULL pointer dereference at virtual address...
    ...
    Call trace:
        max310x_i2c_probe+0x48/0x170 [max310x]
        i2c_device_probe+0x150/0x2a0
    ...

Add check for validity of devtype to prevent the error, and abort probe
with a meaningful error message.

kernel.org https://git.kernel.org/stable/c/0d27056c24efd3d63a03f3edfbcfc4827086b110 [No types assigned]

kernel.org https://git.kernel.org/stable/c/12609c76b755dbeb1645c0aacc0f0f4743b2eff3 [No types assigned]

kernel.org https://git.kernel.org/stable/c/2160ad6861c4a21d3fa553d7b2aaec6634a37f8a [No types assigned]

kernel.org https://git.kernel.org/stable/c/5cd8af02b466e1beeae13e2de3dc58fcc7925e5a [No types assigned]

kernel.org https://git.kernel.org/stable/c/7d271b798add90c6196539167c019d0817285cf0 [No types assigned]

kernel.org https://git.kernel.org/stable/c/aeca49661fd02fd56fb026768b580ce301b45733 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c45e53c27b78afd6c81fc25608003576f27b5735 [No types assigned]