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idpf: fix idpf_vc_core_init error path

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In an event where the platform running the device control plane
is rebooted, reset is detected on the driver. It releases
all the resources and waits for the reset to complete. Once the
reset is done, it tries to build the resources back. At this
time if the device control plane is not yet started, then
the driver timeouts on the virtchnl message and retries to
establish the mailbox again.

In the retry flow, mailbox is deinitialized but the mailbox
workqueue is still alive and polling for the mailbox message.
This results in accessing the released control queue leading to
null-ptr-deref. Fix it by unrolling the work queue cancellation
and mailbox deinitialization in the reverse order which they got
initialized.

Fixes: 4930fbf419 ("idpf: add core init and interrupt request")
Fixes: 34c21fa894 ("idpf: implement virtchnl transaction manager")
Cc: stable@vger.kernel.org # 6.9+
Reviewed-by: Tarun K Singh <tarun.k.singh@intel.com>
Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Pavan Kumar Linga 2024-10-25 11:38:43 -07:00 committed by Tony Nguyen
parent 81d2fb4c7c
commit 9b58031ff9
2 changed files with 1 additions and 1 deletions
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1
drivers/net/ethernet/intel/idpf/idpf_lib.c
View File

@ -1786,6 +1786,7 @@ static int idpf_init_hard_reset(struct idpf_adapter *adapter)
*/
err = idpf_vc_core_init(adapter);
if (err) {
cancel_delayed_work_sync(&adapter->mbx_task);
idpf_deinit_dflt_mbx(adapter);
goto unlock_mutex;
}

1
drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
View File

@ -3063,7 +3063,6 @@ int idpf_vc_core_init(struct idpf_adapter *adapter)
adapter->state = __IDPF_VER_CHECK;
if (adapter->vcxn_mngr)
idpf_vc_xn_shutdown(adapter->vcxn_mngr);
idpf_deinit_dflt_mbx(adapter);
set_bit(IDPF_HR_DRV_LOAD, adapter->flags);
queue_delayed_work(adapter->vc_event_wq, &adapter->vc_event_task,
msecs_to_jiffies(task_delay));