crypto_aesni_mb PMD found crash in access mb_mgr on primary process after secondary process launch scan/probe

https://bugs.dpdk.org/show_bug.cgi?id=934

Bug ID: 934
Summary: crypto_aesni_mb PMD found crash in access mb_mgr on
primary process after secondary process launch scan/probe
Product: DPDK
Version: 20.11
Hardware: x86
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: cryptodev
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---

This is a bug for AESNI_MB PMD in DPDK 20.11. The issue may have been resolved in latest DPDK, but wondering if a patch can be applied for 20.11.

The AESNI_MB PMD in DPDK 20.11 does not work well in supporting multi-process. The crash can be seen by this sequence:
1. The crypto_aesni_mb is started successfuly on primary process by rte_vdev_init.
2. The secondary process launches the scanning/prob procedure and the primary process received the sync req and replied the secondary process. The crypto_aesni_mb is also started by the probe on receiving the reply of the vdev_scan.
3. On primary process, the packet process tries to create the crypto session and it crashes on accessing the mb_mgr of dev->data->dev_private, in aesni_mb_set_session_auth_parameters()

It is found in cryptodev_aesni_mb_create(),
mb_mgr = alloc_init_mb_mgr(vector_mode);
can be triggered on both primary process and second process. Thus after the device is started on primary, the dev->data->dev_private->mb_mgr can be updated when second process started the device again. This is incorrect.

The mb_mgr allocation should be limited to primary process. The same should be applied to the qp->mb_mgr when setup the queue pair.

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