releases/4.19.41/ib-core-fix-potential-memory-leak-while-creating-mad-agents.patch

   1 From 6e88e672b69f0e627acdae74a527b730ea224b6b Mon Sep 17 00:00:00 2001
   2 From: Daniel Jurgens <danielj@mellanox.com>
   3 Date: Sat, 2 Feb 2019 11:09:43 +0200
   4 Subject: IB/core: Fix potential memory leak while creating MAD agents
   5
   6 From: Daniel Jurgens <danielj@mellanox.com>
   7
   8 commit 6e88e672b69f0e627acdae74a527b730ea224b6b upstream.
   9
  10 If the MAD agents isn't allowed to manage the subnet, or fails to register
  11 for the LSM notifier, the security context is leaked. Free the context in
  12 these cases.
  13
  14 Fixes: 47a2b338fe63 ("IB/core: Enforce security on management datagrams")
  15 Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
  16 Reviewed-by: Parav Pandit <parav@mellanox.com>
  17 Reported-by: Parav Pandit <parav@mellanox.com>
  18 Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
  19 Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  21
  22 ---
  23  drivers/infiniband/core/security.c |    8 ++++++--
  24  1 file changed, 6 insertions(+), 2 deletions(-)
  25
  26 --- a/drivers/infiniband/core/security.c
  27 +++ b/drivers/infiniband/core/security.c
  28 @@ -711,16 +711,20 @@ int ib_mad_agent_security_setup(struct i
  29                                                 agent->device->name,
  30                                                 agent->port_num);
  31         if (ret)
  32 -               return ret;
  33 +               goto free_security;
  34
  35         agent->lsm_nb.notifier_call = ib_mad_agent_security_change;
  36         ret = register_lsm_notifier(&agent->lsm_nb);
  37         if (ret)
  38 -               return ret;
  39 +               goto free_security;
  40
  41         agent->smp_allowed = true;
  42         agent->lsm_nb_reg = true;
  43         return 0;
  44 +
  45 +free_security:
  46 +       security_ib_free_security(agent->security);
  47 +       return ret;
  48  }
  49
  50  void ib_mad_agent_security_cleanup(struct ib_mad_agent *agent)