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[ Upstream commit46a0dc10fb] ebu_nand_probe() read the value of u32 variable "cs" from the device firmware description and used it as the index for array ebu_host->cs that can contain MAX_CS (2) elements at most. That could result in a buffer overflow and various bad consequences later. Fix the potential buffer overflow by restricting values of "cs" with MAX_CS in probe. Found by Linux Driver Verification project (linuxtesting.org). Fixes:0b1039f016("mtd: rawnand: Add NAND controller support on Intel LGM SoC") Signed-off-by: Evgeny Novikov <novikov@ispras.ru> Co-developed-by: Kirill Shilimanov <kirill.shilimanov@huawei.com> Signed-off-by: Kirill Shilimanov <kirill.shilimanov@huawei.com> Co-developed-by: Anton Vasilyev <vasilyev@ispras.ru> Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20210903082653.16441-1-novikov@ispras.ru 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.