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[ Upstream commit 546ce0bdc91afd9f5c4c67d9fc4733e0fc7086d1 ] Since ecc_digits_from_bytes will provide zeros when an insufficient number of bytes are passed in the input byte array, use it to convert the r and s components of the signature to digits directly from the input byte array. This avoids going through an intermediate byte array that has the first few bytes filled with zeros. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Stable-dep-of: 3b0565c70350 ("crypto: ecdsa - Avoid signed integer overflow on signature decoding") Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.