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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>
5f818d676a