IB/cma: Fix reference count leak when no ipv4 addresses are set
authorKalderon, Michal <Michal.Kalderon@cavium.com>
Thu, 6 Jul 2017 20:22:11 +0000 (23:22 +0300)
committerDoug Ledford <dledford@redhat.com>
Thu, 20 Jul 2017 15:24:13 +0000 (11:24 -0400)
commit963916fdb3e5ad4af57ac959b5a03bf23f7568ca
tree197b61b6b73cb5e661221f6307da2058867bc111
parente6e52aec494900912fedd7b595b8827ba70a670d
IB/cma: Fix reference count leak when no ipv4 addresses are set

Once in_dev_get is called to receive in_device pointer, the
in_device reference counter is increased, but if there are
no ipv4 addresses configured on the net-device the ifa_list
will be null, resulting in a flow that doesn't call in_dev_put
to decrease the ref_cnt.
This was exposed when running RoCE over ipv6 without any ipv4
addresses configured

Fixes: commit 8e3867310c90 ("IB/cma: Fix a race condition in iboe_addr_get_sgid()")

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
include/rdma/ib_addr.h