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IB/hfi1: Ensure VL index is within bounds 

Improve the safety of the code and ensure the array cannot be indexed
out of bounds when picking the CPU for a given SDMA engine.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Michael J. Ruhl 2017-03-20 17:26:07 -07:00 committed by Doug Ledford
parent 44dcfa4b18
commit f7b4263372
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/hw/hfi1/sdma.c
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@ -962,6 +962,11 @@ ssize_t sdma_set_cpu_to_sde_map(struct sdma_engine *sde, const char *buf,
continue;
}
if (vl >= ARRAY_SIZE(rht_node->map)) {
ret = -EINVAL;
goto out;
}
rht_node = rhashtable_lookup_fast(dd->sdma_rht, &cpu,
sdma_rht_params);
if (!rht_node) {