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In ca8210_test_int_user_write() a user can request the transfer of a frame with a length field (command.length) that is longer than the actual buffer provided (len). In this scenario the driver will copy the buffer contents into the uninitialised command[] buffer, then transfer <data.length> bytes over the SPI even though only <len> bytes had been populated, potentially leaking sensitive kernel memory. Also the first 6 bytes of the command buffer must be initialised in case a malformed, short packet is written and the uninitialised bytes are read in ca8210_test_check_upstream. Reported-by: Domen Puncer Kugler <domen.puncer@samsung.com> Signed-off-by: Harry Morris <h.morris@cascoda.com> Tested-by: Harry Morris <h.morris@cascoda.com> Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> |
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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.