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The PBL array that hold the page DMA address is sized off umem->nmap. This can potentially cause out of bound accesses on the PBL array when iterating the umem DMA-mapped SGL. This is because if umem pages are combined, umem->nmap can be much lower than the number of system pages in umem. Use ib_umem_num_pages() to size this array. Cc: Potnuri Bharat Teja <bharat@chelsio.com> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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.