mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array
authorBart Van Assche <bart.vanassche@sandisk.com>
Mon, 24 Apr 2017 22:15:28 +0000 (15:15 -0700)
committerDoug Ledford <dledford@redhat.com>
Mon, 17 Jul 2017 15:45:07 +0000 (11:45 -0400)
commit99975cd4fda52974a767aa44fe0b1a8f74950d9d
tree1083497346df50890e9d28ec884f7fed36b36e79
parent91647f4c2d66e16b30524613410a638c2c4532bf
mlx5: Avoid that mlx5_ib_sg_to_klms() overflows the klms[] array

ib_map_mr_sg() can pass an SG-list to .map_mr_sg() that is larger
than what fits into a single MR. .map_mr_sg() must not attempt to
map more SG-list elements than what fits into a single MR.
Hence make sure that mlx5_ib_sg_to_klms() does not write outside
the MR klms[] array.

Fixes: b005d3164713 ("mlx5: Add arbitrary sg list support")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Israel Rukshin <israelr@mellanox.com>
Cc: <stable@vger.kernel.org>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
drivers/infiniband/hw/mlx5/mr.c