tree 8f7e9569df40f4b1b8ee7cae88ca9df8571ecaa6
parent 8688426ba6464f7079649f52cf9108856c419415
author Sebastian Sanchez <sebastian.sanchez@intel.com> 1490055898 -0700
committer Doug Ledford <dledford@redhat.com> 1491417909 -0400

IB/hfi1: NULL pointer dereference when freeing rhashtable

A NULL pointer dereference occurs when the driver
is unloaded, and the SDMA rhashtable is freed if
the rhashtable_init() function has not been called.
Prevent this by changing sdma_rht to be a pointer
to a dynamically allocated hash table. The NULL-ness
of the pointer serves as an indication that the hash
table was initialized and that it needs to be
destroyed.

Fixes: 0cb2aa690c7e ("IB/hfi1: Add sysfs interface for affinity setup")
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>