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commit1ecdd37e30upstream. The aesni_gcm_enc/dec functions can access memory after the end of the AAD buffer if the AAD length is not a multiple of 4 bytes. It didn't matter with rfc4106-gcm-aesni as in that case the AAD was always followed by the 8 byte IV, but that is no longer the case with generic-gcm-aesni. This can potentially result in accessing a page that is not mapped and thus causing the machine to crash. This patch fixes that by reading the last <16 byte block of the AAD byte-by-byte and optionally via an 8-byte load if the block was at least 8 bytes. Fixes:0487ccac("crypto: aesni - make non-AVX AES-GCM work with any aadlen") Signed-off-by: Junaid Shahid <junaids@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.