Public bug reported:

Description:

net/smc: fix neighbour and rtable leak in smc_ib_find_route()

-----------------------------------------------------------------------------

Symptom:       The handshake device gets hung during the cleanup after
the SMCR-v2 workload

Problem:       In smc_ib_find_route(), the neighbour found by
neigh_lookup() and rtable resolved by ip_route_output_flow() are not
released or put before return. It may cause the refcount leak.

Solution:      Release the neighbour found via neigh_release()

Upstream-ID:   2ddc0dd7fec86ee53b8928a5cca5fbddd4fc7c06

Author:        [email protected]

Component:     kernel

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Skipper Bug Screeners (skipper-screen-team)
         Status: New


** Tags: architecture-s39064 bugnameltc-212553 severity-high 
targetmilestone-inin2204

** Tags added: architecture-s39064 bugnameltc-212553 severity-high
targetmilestone-inin2204

** Changed in: ubuntu
     Assignee: (unassigned) => Skipper Bug Screeners (skipper-screen-team)

** Package changed: ubuntu => linux (Ubuntu)

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https://bugs.launchpad.net/bugs/2109601

Title:
  [UBUNTU 22.04] net/smc: fix neighbour and rtable leak in
  smc_ib_find_route()

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