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

iio: magnetometer: ak8975: fix potential kernel stack memory leak

Currently in the AK8975 driver there are four instances where potential
uninitialized kernel stack memory leaks can occur. If
i2c_smbus_read_i2c_block_data_or_emulated() returns a value less than
the size of the buffer, uninitialized bytes are retained in the buffer
and later the buffer is passed on to IIO buffers, potentially leaking
memory to userspace.

Fix this by adding checks whether the return value of the function is
equal to the size of the buffer and subsequently if the value is
lesser than zero to distinguish from a returned error code.

https://git.kernel.org/stable/c/12848f4ded022963944c063e09a192549a4dad1e

https://git.kernel.org/stable/c/3d57672119525c59ed73ea21accb001ccbcd6cfd

https://git.kernel.org/stable/c/8cf346074533356d67a6a6a43a192328ad341f11

https://git.kernel.org/stable/c/9f920550abacedc7fc3163dea65ac2a7d0b0765d

https://git.kernel.org/stable/c/a9a00d727b7bbc5e913a919530a9dd468935bf95

https://git.kernel.org/stable/c/a9cf46054f81972f8c0f1dc2a79d2a141999dbce

https://git.kernel.org/stable/c/b974566803bceb72f0b9b5f1d7270b79ba963766

https://git.kernel.org/stable/c/fb27ebf81136e796c7b719303ef6fd7e1ae5d488

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