Merge branch 'net-rds-rdma-cm-event-handler-fixes-for-non-ib-devices'

Allison Henderson says:

====================
net/rds: RDMA-CM event handler fixes for non-IB devices

This is v4 of Aohan Mei's fix for the uninitialized transport pointer
in the RDMA-CM event handler (v1 at [1], v2 at [2], v3 at [3]), now a
two-patch set.

  Patch 1 is the fix itself.  v3 only rejected a connect request
  arriving on a non-IB device; the active side can bind an id to one
  as well, and resolving a route on an iWARP id leaves
  cm_id->route.path_rec unset, which the ROUTE_RESOLVED case
  dereferences.  Such a connection is now dropped at ADDR_RESOLVED
  instead of resolving a route.

  Patch 2 fixes a neighbouring problem in the same case: a synchronous
  rdma_resolve_route() failure was handed back to the rdma_cm, which
  then destroyed an id RDS still owns as ic->i_cm_id and would later
  disconnect and destroy again from the connection's shutdown.

On net-next the rdma_cm ids RDS creates are restricted to IB devices
(commit c7fca8aae6fe), which makes the non-IB cases impossible there;
these are the fixes stable kernels without that API need.

[1] https://lore.kernel.org/netdev/20260824111701.2979194-1-ljp1205831794@gmail.com/
[2] https://lore.kernel.org/netdev/20260825021223.3483044-1-ljp1205831794@gmail.com/
[3] https://lore.kernel.org/netdev/20260928044507.335883-1-achender@kernel.org/
====================

Link: https://patch.msgid.link/20261003163408.250568-1-achender@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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