RDMA/rdmavt: Use correct sizing on buffers holding page DMA addresses

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The buffer that holds the page DMA addresses 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 buffer.

Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Shiraz Saleem 2019-03-28 11:49:47 -05:00 • committed by Jason Gunthorpe

parent 93923d309b

commit 629e6f9db6

1 changed files with 1 additions and 1 deletions

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drivers/infiniband/sw/rdmavt/mr.c

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