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IB/core: Unregister notifier before freeing MAD security

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commit d60667fc39 upstream.

If the notifier runs after the security context is freed an access of
freed memory can occur.

Fixes: 47a2b338fe ("IB/core: Enforce security on management datagrams")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Jurgens
2019-02-02 11:09:42 +02:00
committed by Greg Kroah-Hartman
parent 0d7ae54867
commit 2fecdc27f5
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/core/security.c
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@ -732,9 +732,10 @@ void ib_mad_agent_security_cleanup(struct ib_mad_agent *agent)
if (!rdma_protocol_ib(agent->device, agent->port_num)) if (!rdma_protocol_ib(agent->device, agent->port_num))
return; return;
security_ib_free_security(agent->security);
if (agent->lsm_nb_reg) if (agent->lsm_nb_reg)
unregister_lsm_notifier(&agent->lsm_nb); unregister_lsm_notifier(&agent->lsm_nb);
security_ib_free_security(agent->security);
} }
int ib_mad_enforce_security(struct ib_mad_agent_private *map, u16 pkey_index) int ib_mad_enforce_security(struct ib_mad_agent_private *map, u16 pkey_index)