Revision b79f2dc5ffe17b03ec8c55f0d63f65e87bcac676 authored by Aharon Landau on 13 January 2021, 12:16:59 UTC, committed by Jason Gunthorpe on 14 January 2021, 16:50:17 UTC
rounddown_pow_of_two() is undefined when the input is 0. Therefore we need to avoid it in ib_umem_find_best_pgsz and return 0. Otherwise, it could result in not rejecting an invalid page size which eventually causes a kernel oops due to the logical inconsistency. Fixes: 3361c29e9279 ("RDMA/umem: Use simpler logic for ib_umem_find_best_pgsz()") Link: https://lore.kernel.org/r/20210113121703.559778-2-leon@kernel.org Signed-off-by: Aharon Landau <aharonl@nvidia.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Maor Gottlieb <maorg@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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