Zhu Jianmin 3c83a848cb qcacld-3.0: Fix use after free in roaming disassoc rsp handler
During Rome LFR2 roaming, after pre-auth with new AP finished,
current AP is disassociated. In disassoc rsp handler:
csr_roam_roaming_state_disassoc_rsp_processor,
csr_roam_copy_profile is called after csr_dequeue_command.
In csr_dequeue_command, cmd from active list is removed, cmd from
pending cmd list is moved to active list and executed, if the cmd
is disassoc from wpa supplicant, pSession->pCurRoamProfile is
freed,  use after free happens in csr_roam_copy_profile

call stack when issue happens:

csr_roam_roaming_state_disassoc_rsp_processor
 ->csr_dequeue_command
    ->wlan_serialization_dequeue_cmd
       ->wlan_serialization_move_pending_to_active
          ->wlan_serialization_activate_cmd
             ->sme_ser_handle_active_cmd
                ->csr_roam_process_command
                   ->csr_roam_process_disassoc_deauth
                   -> csr_free_roam_profile
 ->csr_roam_copy_profile

Fixed by calling csr_dequeue_command after csr_roam_copy_profile

Change-Id: I903795e830c153b94a7dc0476a0e8ea5ecf6be2f
CRs-Fixed: 2205645
2018-03-16 05:26:20 -07:00

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